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http://edition.cnn.com/2005
Some nice info, takes 100 billion and 12 years... I want Von Braun back.... 'We will do that in 3 month'. |
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This is good ... our vision for humanity takes another "small step"
beyond Earth ... wrote: http://edition.cnn.com/2005 http://edition.cnn.com/2005/TECH/spa...oon/index.html Some nice info, takes 100 billion and 12 years... I want Von Braun back.... 'We will do that in 3 month'. |
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Of what our rusemasters have most recently made taboo/nondisclosure or
at best need-to-know is anything having to do with the topic of our doing the moon or of "Russia to mine the Moon?" Whereas Russia may have rediscovered that they have a few slight if not nearly insurmountable glitches to deal with. http://groups.google.com/group/sci.s...read/608f283f= 468439de/3e63740c002a9729?lnk=3Dst&q=3Dbrad+guth&rnum=3D1#3 e63740c002a9729 Can you moon-walk upon a surface-tension of 5 g/cm2 without sinking out of sight? Is such moon-dust actually clumping all that good, or what? At 1/6th G (1.623 m/s/s); what's compacting said moon-dust? I believe that mining our moon is going to suck even for a good Russian robot, that is unless you've got traction. As little as 5 g/cm2 worth of a bone-dry quicksand surface-tension isn't exactly promising. As for them Russians mining the moon isn't something that's going to transpire any time soon without their first getting a good number of their moonsuit butts safely onto the earthshine illuminated lunar deck and, that's going to become just a wee bit ticky by way of utilizing those yet unproven fly-by-rocket landers which don't seem to actually exist, not even for the likes of any of those Russian AI/robotic landers having since provided us with little more than pop-up books of depicting what supposedly transpired, that is since apparently their local R&D as recorded upon movie film which hadn't been invented yet. Even if such fly-by-rocket landers of any reasonable payload capacity existed, or if having to R&D create such from scratch as for accommodating the task at hand, whereas per tonnage of getting whatever robotics and certainly of those moonsuit butts safely deployed upon the moon, of then having to operate such mining technology machines, processing and thus extracting upon whatever and of getting the end product packaged and shipped back towards mother Earth is per tonne going to involve at least a good 1000+ tonnes worth of nasty pollution for mother Earth, and of that 1000:1 ratio of pollution contributing factor is not to mention the horrific amounts of raw energy that such efforts will have taken in the first place, thus having far out-stripped any recovery potential of He3. Without their first establishing a good lunar space elevator(LSE), the lunar surface is technically going to continually suck so much worse off than we've been informed. Of physics and science as having been based upon LLPOF worth of smoke and mirrors simply isn't going to make it happen, at least not any time soon. Mining and thereby extracting whatever away from our moon sucks big time even for a good robotic solution unless you've got traction, and perhaps one hell of a nifty periscope to boot. Operating within the sub-frozen nighttime environment of our moon, even with somewhat considerable earthshine and thereby some indirect benefit of secondary thermal influx might become just be the only CO2--dry-ice method of the lunar environment that'll achieve any measurable degree of moon-dirt binding or clumping. As otherwise there's none other drier quicksand to be found unless you're situated upon Mercury, as even a Venus class of hot and obviously bone dry quicksand isn't going to be without benefit of local elements as affording viable binders for sticking such hot and nasty sand together and, much unlike our electrostatic powder puff of a moon, as upon Venus there's certainly not any significant other forms of cosmic influx of sand or meteorites that could have significantly contributed to such terrestrial depth(s) becoming whatever's Venus sand, soil or dust. Perhaps the mostly Russian Venus Express mission will further define as to whatever's what with regard to the various depths and composition of the otherwise geologically hot and nasty Venus soils, plus identifying a few of those likely active mud flows and S8 sulphur vents. The Next Lunar Rover; may still manage to sink itself out of sight http://ares.jsc.nasa.gov/HumanExplor...cs/BeyondLEO/= leo194/rover.htm Having a dry mass of under 1000 kg and having six extremely large traction wheels seems a whole lot more doable, that is as long as their conditional laws of moon-physics of such nasty dust/soil remains as a relatively thin coating that's somehow magically clumping within the first 12.5 mm and apparently comprised of entirely nonreactive substance like nowhere other. However, along with another 1000 kg of payload brings the tally to nearly 2000 kg, thus 333 kg divided upon 6 wheels offering 56 kg/wheel is at least getting somewhat suggestive of what darn little mass that supposedly thin layer of such nicely auto-clumping moon-dirt of lunar cornmeal and portland cement can manage to support, and that's for using wheels offering better than 6 fold the surface contact area, thus in total accomplishing 10 times the traction of what those original Apollo rovers had to work with. Terrestrial ROLLING RESISTANCE isn't quite the same thing as for the moon. http://www.perfnet.com/haul_truck_83...timization/in= troduction_and_definitions.htm The following link provides us with a nifty traction and required energy calculator, although terrestrial based but otherwise especially interesting if using their "Sand Dune(.16)" consideration as to what a 150 kg tractor + 150 kg trailer for a combined mass of 300 kg represents at various grades. I also used 10 mph and 100 seconds as for the acceleration factor, zero ballast and a grade of 10%. You may want to utilize an overall efficiency of 0.25 instead of 0.85 just for good measure. http://www.talbertmfg.com/index2.html This is assuming and thus based upon a reasonable set of two extra/double-wide or that of the usual four large diameter and wide enough driving tires/axle of good tread design that are not sinking into whatever substance as being driven upon. It's obviously not considering the much lighter fluff or far less clumping nature of whatever actual moon-dust is all about, which may actually represent another factor of extremely slight moon-dust buoyancy issues as much as less surface-tension since their no good reason for such dust to have compacted, nor at least in any known manner of physics as for clumping that substance under the absolute best of situations wouldn't sustain more than 50 g/cm2 unless there's only a relatively thin layer of such moon-dust and/or sufficiently nearby bedrock upon which to drive. Whereas a wise assumption of unsupported and thus unclumping surface-tension might be a bit closer to 5 g/cm2. BTW; the absolute driest of terrestrial sand dunes would still have a million fold more moisture content as for accommodating whatever binding degree of clumping, thus walking and/or having to drive upon such a terrestrial substance that leaves no footprints nor of even sustaining any trace of tire tracks for long is still considerably better off than what even a 1/6th gravity and certainly more than bone dry situation upon what our scorching and otherwise terribly reactive moon has to offer. Lose sand upon Earth that's bone dry (least clumping) offers a flat surface rolling resistance of 15%, whereas going the least bit vertical adds considerable insult to injury, meaning that the rolling resistance can easily double due to a loss of traction and thus wheel spinning. A 10% grade upon a hard and smooth surface represents another 10% worth of base energy required for the same task of moving a given tire upon whatever asphalt/concrete substance, whereas on a truly lose sand or lunar composite dust that your tires have been sinking into may more than double if not four times that ratio. "The degree of traction between the tire and the ground is called the coefficient of traction." "Since there is never 100 percent adhesion, the coefficient is always less than 1.0. The result of multiplying the weight on the drive axle times the coefficient of traction represents the maximum force which can be transmitted before the tire spins out." "For example, a vehicle with 200,000 kg of weight on the drive axle and working on ground conditions having a coefficient of traction of 0.6 can deliver up to 120,000 kg (200,000 kg =D7 0.6) of force before the tires will spin out." Given roughly 1000 cm2 per set or pair of over-enlarged moonboots as having to walk upon such dusty locations offering a surface tension worth 50 g/cm2 represents that a given moonsuit EVA that's worth 25 kg should be doable at representing 25 g/cm2, although upon one moonboot foot at a time or 500 cm2 per step having to support the entire 25 kg is going to become nearly equal to whatever surface-tension that's supposedly capable of eventually supporting at 50 g/cm2, which represents that whatever moon-walking may require somewhat enlarged footprints that might otherwise represent a pair of clown shoes or those of compact snowshoes. Even though the surface tension is perhaps worthy of 0.05 kg/cm2, in places this may be somewhat like having to walk through certain density of powder snow, in that each step will have to sink into the more likely 5 g/cm2 composite of moon-dust before that surface tension becomes all that usable, thereby any rolling tire or other flat tread like tire is going to be transferring a great deal of material up and around that form of traction, whereas a camel like traveling machine might prove more acceptable, especially if it had six legs that were long enough so as to keeping it's payload and passengers above the thick dust. Traveling via robotic moon-camel isn't all that far fetched. Say if each of the six legged machines offered a m2 cupped foot per leg, that's potentially 6 m2 or 60,000 cm2 to work with. At half-loading is where that amount of area becomes worth 30,000 cm2, upon which 0.05 kg/cm2 =3D 1500 kg of moon mass or 9t Earth mass, although I have my doubts we'll actually have 50 g/cm2 to work with. A traction tread/belt as having perhaps 10 m2 of a working amount of surface contact should do as well if not a bit better as long as it's operating depth capacity isn't limited. Thus 100,000 cm2 X 0.05 kg/cm2 =3D 5,000 kg or at the same half-load capacity of 15t Earth mass. Excluding factors of buoyancy, at 1G the surface-tension of warm water is 72 dynes/cm; that's just 7.34e-2 g/cm2. Obviously terrestrial dry-quicksand is offering a great deal more surface-tension plus a better displacement degree of buoyancy, although uncompacted moon-dust may not support a surface-tension much better than 5 g/cm2. Dry Quicksand http://www.absoluteastronomy.com/enc..._quicksand.htm "Lohse found that a weighted ping pong ball (radius 2cm, mass 133g), when released from just above the surface of the sand, would sink to about five diameters. Lohse also observed a "straight jet of sand [shooting] violently into the air after about 100 ms". Objects are known to make a splash when they hit sand, but this type of jet has never been described before." That's roughly a total ball surface area of 50 cm2. Dividing that by 3 offers at most 17 cm2 worth of a supportive surface area that's having been somewhat offset by a slight buoyancy factor since the above weighted ball submerged itself to roughly a depth of 20 cm. As then we can deduce the notion that a 133 g mass had eventually obtained a dry-quicksand surface tension worthy of not more than 7.8 g/cm2, or 46.8 g/cm2 worth of terrestrial mass as having been situated upon the moon could become the case. However, being that the same dry-quicksand as otherwise situated within the same 1/6th G environment should also be taken into account, thus perhaps at the very optimum best 10 g/cm2 is about all we're ever going to obtain. Thereby not going by my previous 50 g/cm2 but having to use 10 g/cm2 if not 5 g/cm2 to safe should become the wise alternative as for keeping your moonsuit butt and head above such obviously extremely dry-quicksand of the moon, especially wise if that's having to involve the compression ratio of 5:1 as being worth taking note of. As for getting those two reasonably hefty moonsuits and especially of their lander at something that amounted to nearly 16 tonnes resting nicely upon 3 pads that looked as though each offered somewhat less than a square meter, thereby affording 0.9 m2 as having accommodated 900 kg/pad that barely managed to compress into the first couple of inches is suggestive of their having 6 out of six times set their fly-by-rocket craft down upon a relatively firm surface-tension of something that's certainly better than 100 g/cm2. This is either quite unexpected or damn lucky since in places the surface tension could have been less than 5 g/cm2 and otherwise at most 10 g/cm2, and of course their next generation lander that's getting proposed is going to have to become extremely robust for taking a payload of perhaps 3 astronauts plus a rather substantially larger and thus more of everything rover that's at least twice the capacity of what our Apollo teams had to work with, thus a combined terrestrial mass of certainly not less than 24 tonnes and most likely with the necessary de-orbit and down-range plus sufficient (what-if) spare fuel and the third person accommodation making it 27 tonnes, which computes out to 1500 kg/pad. Thus even with a 4 m2 landing pad is still having to bet the farm upon setting down upon a dry quicksand surface-tension of 37.5 g/cm2, which by all logic and certainly of the known laws of physics simply may not exist unless we're talking about mostly bedrock or at least significant piles of impact related shards that are sufficiently vertical in slope so as to have since been blown nearly clean by some 1200+km/s solar winds, that which should have easily reached the surface if there's actually as slight of atmosphere as having been reported. Getting this task of whatever safely to/from the moon down to a bit more realistic measure requires a lunar space elevator: Of any such new and "improved lunar landing architecture" needs exactly what the LSE-CM/ISS infrastructure has to offer, that is unless we're talking about one-way tickets to ride. As per the task of terraforming our moon into becoming a bit more robotically obtainable is certainly a doable task without ever risking a single astronaut. Over the past 6 years it has certainly become most interesting in that whenever individuals like myself have drawn upon the wisdom and hard-science of others for perfectly honest actions, as for our utilizing the best available hard-science and so much other expertise accomplished by so many as having been previously mainstream worshiped, in that if such science knowledge in any way provides rational though alternative interpretations that are the least outside their MI6/NSA~NASA box, whereas then all of the sudden the evidence exclusions and of those brown-nosed conditional laws of physics come into play. Why is that? Why are these mainstream wizards and of their mainstream God(s) (pagan or otherwise) so freaking terrestrial limited? Of what's become nondisclosure/taboo http://groups.google.com/group/soc.c...rm/thread/5d5= dd4ec128536f3/af7489fc47bbcc24?hl=3Den#af7489fc47bbcc24 Perhaps it's all another part of God's master plan, as to keeping us as Earthly ET minions as thoroughly sequestered and snookered as possible, thus every bit as terrestrial dumb and dumber to the dumbfounded point of no return. God's ideal formula of artificial population control via LLPOF collateral damage and the horrific carnage of the innocent, not to even mention upon artificially global-warming our sorry butts to our own demise. Sounds like quite a Godly sort of plan of action to me. It's almost as though the topic/author banishment is yet another part of God's LLPOF plan of action, or perhaps that of an orchestrated level of inaction that sucks and blows at the same time. Apparently, I'm getting myself closer to being God's equal, especially if banishment is all that remains for the mainstream status quo to use against my good intentions of sharing the truth and nothing but the truth. That's really too bad in more ways than you'd think, in that as of more than 5 years ago, at least I would have been matching the funding of dozens of such good intentioned efforts with nearly unlimited capacity, as towards making a difference that would have directly benefitted the greater good for the lower 99.9% humanity of this Earth (the upper most 0=2E1% simply don't need any benefits). But then what's another half decade or even several decades and of the trillions upon trillions of hard earned dollars down the proverbial drain worth these days? ~ Life upon Venus, a township w/bridge & ET/UFO Park-n-Ride Tarmac: http://guthvenus.tripod.com/gv-town.htm The Russian/China LSE-CM/ISS (Lunar Space Elevator) http://guthvenus.tripod.com/lunar-space-elevator.htm Venus ETs, plus the updated sub-topics; Brad Guth / GASA-IEIS http://guthvenus.tripod.com/gv-topics.htm "In war there are no rules" - Brad Guth |
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If our NASA or that of Russia, China or whomever is ever going to mine
the Moon; Here's another nagging tidbit of what's so gosh darn interesting, as well as remaining pesky about such fully exposed space travel. The same old to/from testy matter of folks having to deal with the hot and nasty portions of the Van Allan expanse is still giving such future space travel a royal DNA chopping pain in the butt, and even that's based upon not ever getting caught with your pants down shortly after another large solar zit lets go. The Van Allen Belts (MOS disinformation-R-us) http://image.gsfc.nasa.gov/poetry/tour/AAvan.html Outer Belt carry between 10 to 100 million volts of energy, on average. "Typical 'Belt' particles carry energies between 1 and 100 million volts. The rest of the particles that we can encounter near the earth barely have energies higher than 200,000 volts." "Space Shuttle and Space Station astronauts inside their crafts receive about 2 mRems of additional dosage each time they pass through the SAA. In one day they can accumulate 30 mRem of dosage. Over the course of a week, this adds up to 7 x 30 = 210 mRems which is just below the dosage you get at ground-level in a single year (about 350mRem)." "Apollo astronauts, however, were forced to traverse the most intense regions of the Belts in their journey to the Moon. Fortunately, the travel time was only about 30 minutes so their actual radiation exposures inside the Apollo space capsule were not much more than the total dose received by Space Shuttle astronauts." Unfortunately, "the most insense regions" for 30 minutes each way wasn't by any means their only significant portion of that Van Allen zone of death trek. It took nearly a good 10,000 seconds or at the very least 2.5 hours each way to get entirely through the Van Allen badlands, and that's 5 hours stacked on top of their getting secondary/recoil radiated by all of the hard-X-ray energy coming off the solar illuminated moon, that which even from orbiting at 100+km couldn't have been a good thing, much less having those EVA/moonsuit walks directly upon what by all methods of known radiation physics and of more recent terrestrial satellite measurements of the solar illuminated moon was in fact a highly reactive and otherwise an extremely dark (nearly coal like darkness) and nasty albedo environment, not to mention hotter than hell. The worst portion of the Van Allen zone that they claim as having spent their 30 minute within each way was perfectly capable of being worth 200e3 rads/year, which boils down to a perfectly survivable worth of 23 rads/hr as situated behind 2 g/cm2 worth of aluminum shielding, and it certainly takes a great deal of extra shielding as to cut that dosage in half, such as having a 0.7" layer of lead in all directions. Thus even via extremely mild solar hours within the entire trek of their getting to/from the moon is going to be worth a whole lot more than the mere 30 minutes each way as having been touted as to why they'd received such slight amounts of a TBI dosage. Of course, since we still have no instruments that are openly reporting the honest hard-science dosage levels of such space travel zones, much less from the lunar surface, as such there's no viable way that others can prove me wrong without their spilling a few more of their brown-nosed perpetrated cold-war beans. ~ Life upon Venus, a township w/Bridge & ET/UFO Park-n-Ride Tarmac: http://guthvenus.tripod.com/gv-town.htm The Russian/China LSE-CM/ISS (Lunar Space Elevator) http://guthvenus.tripod.com/lunar-space-elevator.htm Venus ETs, plus the updated sub-topics; Brad Guth / GASA-IEIS http://guthvenus.tripod.com/gv-topics.htm War is war, thus "in war there are no rules" - In fact, war has been the very reason of having to deal with the likes of others that haven't been playing by whatever rules, such as GW Bush. |
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Though it is true that these magnetic belts can be potentially
dangerous, didn't astronauts travel through them in the 1970's with the Apollo program? If we really wanted to know it the belts are harmful, then why didn't NASA do medical tests on the astronauts that came back? I would seem to me that they would have, and if they did and found something, that they would have cancelled the program. Maybe I am mistaken or naive, but I would expect that since the journey to the moon has already been accoplished in a more primitive spacecraft, that going back to the moon with new technology could only be better. |
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Alfred A. Aburto Jr and pantel,
It seems of what our cloak and dagger rusemasters have most recently made into further hocus-pocus and/or of taboo/nondisclosure, or at best another need-to-know sort of sequestered topic is upon anything having to do with the honest notions of this "NASA to reveal moon plan" or "Russia to mine the Moon?" or you name it if it involves the truth and nothing but the truth. Unlike those having to assume that we've been there and done that moon thing, I'm not having to assume anything that's not of physics-101, or perhaps even duh-101 hard-science. Of course, having seen a little of the hard-science about the harsh solar illuminated environment of our moon as being a whole lot more than just thermally hot and nasty isn't exactly helping the cause of folks eventually habitating upon or even within the moon because, no matters what, you still have to get these folks and whatever stuff safely to/from the lunar surface without involving the somewhat negative PR aspects of such passengers impacting and vaporising upon their arriving at moon-base whatever. Even the earthshine environment upon the moon is potentially lethal if almost anything physical comes along, such as per arriving out of nowhere as represented as a wide-open-field of 360 X 180 degrees worth of exposure, that which so much as an arriving dust-bunny could nail your moonsuit butt, or even from a secondary meteorite shard that's still capable of making better than 2 km/s isn't exactly a warm and fuzzy sort of reassuring notion. Thus I totally agree with Jordan's "If you are naked on the Lunar surface, you have far more urgent concerns than the sunburn!", as for being within a robust moonsuit is essentially still nearly butt naked if you're having any contest between yourself and that of an arriving 30+km/s speck of dust. Consider the ratio of crater diameter per size of meteorite and lo and behold, you could be looking at one hell of a nasty hole in your moonsuit, or perhaps at the very least a hefty dent that should easily knock you onto your moonsuit butt. Thus a mere spec of sand might easily become termination of life as you know it, whereas the head-on velocity of some of those specs of sand can become worth 100 km/s. Therefore the more natural plus artifically generated atmosphere the better, even it it's got a good amount of the radon(Ra-222) element as a portion of that surface atmosphere. In fact, for the sake of defending yourself, the more radon gas the better. If anything, my robust LSE-CM/ISS is all about the viable aspects of eventually colonizing our Moon. For starters having the LSE up and running is certainly a good thing, whereas from that point on we could easily pulverise the moon with itself, thus releasing megatonnes of O2/year from the raw basalt that's getting efficiently vaporised by merely releasing a tonne at a time of lunar basalt away from being roughly 60,000 km off the deck, thus without a kg of rocket fuel or any other form of dedicated propulsion we'd obtain at the very least a 1000:1 ratio of each impact making O2 available. Therefore, per tonne as having been gently tossed away from a few km below the CM/ISS that's residing roughly 64,000 km off the deck would potentially release 1000 tonnes of O2, whereas eventually this mostly robotic process of perhaps releasing 3t/24 hrs would create and sustain perhaps as much as 0.17 bar that's quite possibly breathable, that is if the lower atmospheric layer of radon gas isn't remaining quite as extensive as some have thought. However, life should be good within the 50e6t CM/ISS abode or that of keeping yourself sequestered 15+ meters deep and/or within hollow rilles or hopefully a few ready-made geode pockets that could be easily reconfigured as underground lakes of salty water, whereas this life underground notion might be a whole lot more doable than we'd thought. BTW; earthshine isn't an insignificant amount of illumination, at roughly 50 fold greater off than what the best moonshine arrives upon the surface of Earth is actually offering a fairly good standard by which to work by, and there's even a touch of secondary IR earthshine to warm your soul. I seem to recall that moonshine is supposedly worth 0=2E1=B0C upon the surface of Earth, thus perhaps as great as shifting the average lunar nighttime surface temperature that's supposedly -153=B0C by +5=B0C worth of earthshine could be the case, which is still damn cold but, we can technically deal with being cold a whole lot easier than being too warm. Jordan; I'm not sure what you mean by "surface-tension." Did you mean to = say "gravity?" Gravity is certainly another factor but not the key point of what dry quicksand surface-tension is all about. A GOOGLE search for the surface-tension of water, then try a search for the surface-tension of dry quicksand, then start running off the math as to a 1/6th gravity and that of an extremely bone dry environment that by all the regular laws of physics shouldn't clump all that well and, much less explain as to such a slight layer of dust as though the moon isn't very old nor so freaking naked to whatever's coming along. Perhaps then you tell me how your folks are going to be walking upon and/or snorkeling their way through such fluffy and perhaps electrostatic sorts of nasty stuff. I'm thinking that Russia may have rediscovered that they'll have to deal with a few slight if not nearly insurmountable glitches along the way. http://groups.google.com/group/sci.s...read/608f283f= 468439de/3e63740c002a9729?lnk=3Dst&q=3Dbrad+guth&rnum=3D1#3 e63740c002a9729 Such as; Can you even moon-walk upon a surface-tension of 5 g/cm2 without sinking out of sight? Is such moon-dust actually clumping all that good, or what? (where's the hard-science?) At 1/6th G (1.623 m/s/s); what's available for compacting or otherwise binding said moon-dust? What happens as a result of mining the moon, as to the artificially created moon-dust? I believe that the task of mining our moon is even going to suck the life out of a good Russian robot, that is unless you've got traction, a periscope or perhaps a good set of stilts. Because, 5 g/cm2 worth of a bone-dry quicksand surface-tension in places isn't exactly promising. As for them Russians mining the moon isn't something that's going to transpire any time soon without their first getting a good number of their moonsuit butts safely onto the earthshine illuminated lunar deck and, that's going to become just a wee bit ticky by way of having to utilizing those yet unproven fly-by-rocket landers which don't seem to actually exist, not even for the likes of any of those Russian AI/robotic landers having since provided us with little more than pop-up books depicting what supposedly transpired, that is since apparently all of their R&D as should have been easily recorded upon movie film hadn't been invented yet. Even if such fly-by-rocket landers of any reasonable payload capacity existed, or if having to R&D create such from scratch as for accommodating the task at hand, whereas per tonnage of getting whatever robotics and certainly of those moonsuit butts safely deployed upon the moon, of then having to operate such mining technology of such machines, processing and thus extracting upon whatever (such as He3) and of getting the end product packaged and shipped back towards mother Earth is per tonne going to involve at least a good 1000+ tonnes worth of nasty pollution for mother Earth, and of that 1000:1 ratio of pollution contributing factor is not to mention the horrific amounts of raw energy that such efforts will have taken from Earth in the first place, thus likely having far out-stripped any recovery potential of He3. Without their first establishing a good lunar space elevator(LSE), the lunar surface is technically going to continually suck so much worse off than we've been informed. Of physics and science as having been based upon LLPOF worth of smoke and mirrors simply isn't going to make such happen, at least not any time soon. Mining and thereby extracting whatever away from our moon sucks big time energy and dollars even for a good robotic solution unless you've got one of good traction, and perhaps one hell of a nifty periscope to boot. Operating within the sub-frozen nighttime environment of our moon, even with somewhat considerable earthshine and thereby some indirect benefit of secondary thermal influx might become the only CO2--dry-ice--CO2 (day-night-day) cycle of any method that worth improving the lunar environment that'll achieve any measurable degree of moon-dirt binding or clumping. As otherwise there's none other drier or fluffier quicksand to be found unless you're situated upon Mercury, as even a Venus class of hot and obviously bone dry quicksand isn't going to be without benefit of the local elements affording viable binders for sticking such hot and nasty Venus soil together and, much unlike that of our electrostatic powder puff of a moon, as upon Venus there's certainly not any significant forms of cosmic or solar influx of sand or meteorites that could have significantly contributed to such terrestrial depth(s) becoming whatever's Venus sand, soil or dust. In other words, I believe that Venus is mostly Venus unless you're talking about a time before things got all geologically hot and nasty and subsequently developed that absolutely terrific atmospheric shield. Perhaps the mostly Russian Venus Express mission will help to further define as to whatever's what with regard to the various depths and composition(s) of the otherwise geologically hot and nasty Venus soils, plus identifying a few of those likely active lava and/or mud flows plus S8 sulphur vents that should be atmospherically interactive enough for the onboard science instruments to sample. The Next Lunar Rover; may still manage to sink itself out of sight http://ares.jsc.nasa.gov/HumanExplor...cs/BeyondLEO/= leo194/rover.htm Having a dry mass of under 1000 kg and having six extremely large traction wheels seems a whole lot more doable, that is as long as their conditional laws of moon-physics of such nasty dust/soil remains as a relatively thin coating that's somehow magically clumping within the first 12.5 mm and apparently comprised of entirely nonreactive substance like nowhere other. However, along with accommodating another 1000 kg of payload brings the tally to nearly 2000 kg, thus 333 kg divided upon 6 wheels is still counting upon 56 kg/wheel which is at least getting somewhat suggestive of what darn little mass that supposedly thin layer of such nicely auto-clumping moon-dirt of lunar cornmeal and portland cement can manage to support, and that's for using wheels offering better than 6 fold the surface contact area, thus in total accomplishing the task at roughly 10 times the traction of what those original Apollo rovers had to work with. Terrestrial ROLLING RESISTANCE isn't quite the same thing as for the moon. http://www.perfnet.com/haul_truck_83...timization/in= troduction_and_definitions.htm The following link provides us with a nifty traction and required energy calculator, although terrestrial based but otherwise especially interesting if using their "Sand Dune(.16)" consideration as to what a 150 kg tractor + 150 kg trailer for a combined mass of 300 kg represents at various grades. I also used 10 mph and 100 seconds as for the acceleration factor, zero ballast and a grade of 10%. You may want to utilize an overall efficiency of 0.25 instead of 0.85 just for good measure. http://www.talbertmfg.com/index2.html This is assuming and thus based upon a reasonable set of two extra/double-wide or that of the usual four large diameter and wide enough driving tires/axle of good tread design that are not sinking into whatever substance as being driven upon. It's obviously not considering the much lighter fluff or far less clumping nature of whatever actual moon-dust is all about, which may actually represent another factor of extremely slight moon-dust buoyancy issues as much as less surface-tension since their no good reason for such dust to have compacted, nor at least in any known manner of physics as for clumping that substance under the absolute best of situations wouldn't sustain more than 50 g/cm2 unless there's only a relatively thin layer of such moon-dust and/or sufficiently nearby bedrock upon which to drive. Whereas a wise assumption of unsupported and thus unclumping surface-tension might be a bit closer to 5 g/cm2. BTW; the absolute driest of our terrestrial sand dunes would still have a million fold more moisture content as for their accommodating whatever binding degree of soil/sand clumping, thus walking and/or having to drive upon such a terrestrial substance that leaves no footprints nor of even sustaining any trace of tire tracks for long is still a surface-tension that's considerably better off than what even a 1/6th gravity and certainly more than bone dry situation upon what our scorching hot and otherwise terribly solar and cosmic reactive moon has to offer. Keeping in mind, that if Earth didn't have the magnitosphere and a sufficiently thick amount of atmosphere, Earth too would be even more reactive because of the average densitiy being greater than that of the moon. Thus if the moon is not reactive in your good book it's because of having a sufficient atmosphere. So make up you mind, does it or doesn't have an atmosphere? According to http://www.talbertmfg.com/index2.html Supposedly sand upon Earth terrain that's bone dry (least clumping) offers a flat surface rolling amount of extra resistance being worth 15%, whereas without taking into account as for tires sinking into said sand but just for going the least bit vertical adds considerable insult to injury, meaning that the rolling resistance can easily double due to a loss of traction and thus wheel spinning. A 10% grade upon a hard and smooth surface represents another 10% worth of base energy required for the same task of moving a given tire upon whatever asphalt/concrete substance, whereas on a truly lose sand or lunar composite dust that your tires have been sinking into may more than double if not require four times that ratio. "The degree of traction between the tire and the ground is called the coefficient of traction." "Since there is never 100 percent adhesion, the coefficient is always less than 1.0. The result of multiplying the weight on the drive axle times the coefficient of traction represents the maximum force which can be transmitted before the tire spins out." "For example, a vehicle with 200,000 kg of weight on the drive axle and working on ground conditions having a coefficient of traction of 0.6 can deliver up to 120,000 kg (200,000 kg =D7 0.6) of force before the tires will spin out." Given roughly 1000 cm2 per set or pair of over-enlarged moonboots as having to walk upon such dusty locations offering a surface tension worth 50 g/cm2 represents that a given moonsuit EVA that's worth 25 kg should be doable at representing 25 g/cm2, although upon one moonboot foot at a time or perhaps 500 cm2 applied per step would be having to support the entire 25 kg is going to become nearly equal to whatever the best possible surface-tension that's supposedly capable of clumping moon-dirt eventually supporting at greater than 50 g/cm2, which represents that whatever moon-walking may require somewhat enlarged footprints that could represent a pair of clown shoes or those of compact snowshoes unless the hard stuff is always an inch or so below the dusty surface. I'm thinking that, Even though the surface-tension is perhaps worthy in certain places of supporting as much as 0.05 kg/cm2, in other places this may be somewhat like having to walk through a dry fluff density of powder snow, in that each step will have you sinking through the more than likely a 5 g/cm2 composite of moon-dust before that amount of magic clumping moon-dirt worth of soil compression becomes worthy of sustaining even that 5 g/cm2 amount of surface-tension and thus becomes all that usable, thereby any rolling tire or other flat tread like tire or belt/tred is going to be transferring a great deal of material up and around that form of wheel/tire traction, whereas a camel like traveling machine might prove more acceptable, especially if it had six legs that were long enough so as to keeping it's payload and passengers above the thick dust that has got to be worth 10+ meters in places. Traveling via robotic (six legged) moon-camel isn't all that far fetched. Say if each of the six legged machines offered a m2 cupped foot per leg, as that's potentially giving 6 m2 or 60,000 cm2 to work with. At half-loading is where that amount of area becomes worth 30,000 cm2, upon which 0.05 kg/cm2 =3D 1500 kg of moon mass or 9t Earth mass, although I seriously have my doubts we'll actually have nearly as good as 50 g/cm2 to work with unless you've bottomed out. A traction tread/belt as having perhaps 10 m2 of a working amount of surface contact should do as well if not a bit better as long as it's submerged operating depth capacity isn't limited. Thus 100,000 cm2 X 0=2E05 kg/cm2 =3D 5,000 kg or at the same half-load capacity of 15t Earth mass. As background info; excluding factors of buoyancy, at 1G the terrestrial surface-tension of warm water is 72 dynes/cm. That's worthy of just 7.34e-2 g/cm2. Obviously terrestrial dry-quicksand is offering a great deal more surface-tension plus a better displacement degree of buoyancy, although uncompacted moon-dust may not support a surface-tension much better than 5 g/cm2. Dry Quicksand http://www.absoluteastronomy.com/enc..._quicksand.htm "Lohse found that a weighted ping pong ball (radius 2cm, mass 133g), when released from just above the surface of the sand, would sink to about five diameters. Lohse also observed a "straight jet of sand [shooting] violently into the air after about 100 ms". Objects are known to make a splash when they hit sand, but this type of jet has never been described before." That's roughly a total ball surface area of 50 cm2. Dividing that by 3 offers at most 17 cm2 worth of a supportive surface area that's having been somewhat offset by a slight buoyancy factor since the above weighted ball submerged itself to roughly a depth of 20 cm before being supported. As then we can deduce the notion that a 133 g mass had eventually obtained a dry-quicksand surface tension worthy of not more than 7.8 g/cm2, or 46.8 g/cm2 worth of terrestrial mass as having been situated upon the moon could become the case. However, being that the same dry-quicksand as otherwise situated within the same 1/6th G environment should also be taken into account, thus perhaps at the very optimum best 10 g/cm2 is about all we're ever going to obtain. Thereby not going by my previous 50 g/cm2 but having to use 10 g/cm2 if not 5 g/cm2 to safe should become the wise alternative as for keeping your moonsuit butt and head above such obviously extremely dry-quicksand of the moon, especially wise if that's having to involve the compression ratio of 5:1 as being worth taking note of. As for getting those two reasonably hefty moonsuits and especially of their lander at something that amounted to nearly 16 tonnes resting nicely upon 4 pads that looked as though each offered roughly a square meter (10,000 cm2/pad), thereby having to accommodate 675 kg/pad that barely managed to compress past the first inch is suggestive of their having 6 out of six times set their fly-by-rocket craft down upon a relatively firm surface-tension of something that's certainly indicating as better than 100 g/cm2. This is either quite unexpected or damn lucky since in places the surface-tension could have been less than 5 g/cm2 and otherwise at most 10 g/cm2, and of course their next generation lander that's getting proposed is going to have to become extremely robust for taking a payload of perhaps 3 astronauts plus a rather substantially larger and thus more of everything rover that's at least twice the capacity of what our Apollo teams had to work with, thus a combined terrestrial mass of certainly not less than 24 tonnes and most likely with the necessary de-orbit and down-range plus sufficient (what-if) spare fuel and the third person accommodation making it worth 27 tonnes, which computes out to 1125 kg/pad. Thus even with each 4 m2 landing pad is still having to bet the farm upon setting down upon a dry quicksand surface-tension of better than 28 g/cm2, which by all logic and certainly of the known laws of physics simply may not exist unless we're talking about mostly bedrock or at least situated upon significant piles of impact related shards that are sufficiently vertical in slope so as to have since been blown nearly clean by some 1200+km/s solar winds, that which should have easily reached and reacted with the surface if there's actually as slight of atmosphere as having been reported. I believe getting this task of whatever safely to/from the moon surface down to a bit more realistic measure requires a lunar space elevator: Of any such new and "improved lunar landing architecture" certainly needs exactly what the LSE-CM/ISS infrastructure has to offer, that is unless we're talking about one-way tickets to ride. As per the task of terraforming our moon into becoming a bit more robotically obtainable is certainly a doable task without ever risking a single astronaut. Jordan; The Moon is _not_ particularly "radioactive." In fact it is _less_ radioactive than is the Earth. Please offer your basis (other than based upon those NASA/Apollo bible scriptures) for this conclusion because, even NASA's new guard has science published as to the average lunar bedrock that is considerably more "radioactive" than upon Earth. Thus instead of our receiving a local geological based dosage of 0.5 mr/day, as per existing here upon Earth, you'd be looking at several mr/day, plus whatever's cosmmic and solar contributed, plus whatever's of secondary/recoil dosage that's smack dab in the hard-X-ray spectrum and, every time earth is situated directly between yourself and the sun is when you'll get an extra taste of what our outter most Van Allen zone of death can contribute, as somewhat the lunar SAA sort of booster TBI shot. All and all, if things should get a little bit testy, having banked bone marrow should save the day. Jordan; I don't have a _clue_ as to what you mean by "reactive" in this co= ntext. Search for secondary/recoil radiation, or perhaps secondary/recoil photons. You'll find more info than this usenet cold hope to store. Basically the direct solar radiation for the most part isn't of what's going to nail your sorry DNA/RNA hide to the wall, although a quick shot of whatever's being expedited along by a 1200~2400 km/s solar wind isn't even a fair contest because, your DNA will lose big-time. ~ Life on Venus includes your basic Township, Bridge & Tarmac: http://guthvenus.tripod.com/gv-town.htm Russian/Chinese LSE-CM/ISS (Lunar Space Elevator) http://guthvenus.tripod.com/lunar-space-elevator.htm A few other sub-topics of interest by; Brad Guth / GASA-IEIS http://guthvenus.tripod.com/gv-topics.htm |
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Brad Guth wrote:
Alfred A. Aburto Jr and pantel, It seems of what our cloak and dagger rusemasters have most recently made into further hocus-pocus and/or of taboo/nondisclosure, or at best another need-to-know sort of sequestered topic is upon anything having to do with the honest notions of this "NASA to reveal moon plan" or "Russia to mine the Moon?" or you name it if it involves the truth and nothing but the truth. Unlike those having to assume that we've been there and done that moon thing, I'm not having to assume anything that's not of physics-101, or perhaps even duh-101 hard-science. Of course, having seen a little of the hard-science about the harsh solar illuminated environment of our moon as being a whole lot more than just thermally hot and nasty isn't exactly helping the cause of folks eventually habitating upon or even within the moon because, no matters what, you still have to get these folks and whatever stuff safely to/from the lunar surface without involving the somewhat negative PR aspects of such passengers impacting and vaporising upon their arriving at moon-base whatever. Even the earthshine environment upon the moon is potentially lethal if almost anything physical comes along, such as per arriving out of nowhere as represented as a wide-open-field of 360 X 180 degrees worth of exposure, that which so much as an arriving dust-bunny could nail your moonsuit butt, or even from a secondary meteorite shard that's still capable of making better than 2 km/s isn't exactly a warm and fuzzy sort of reassuring notion. Thus I totally agree with Jordan's "If you are naked on the Lunar surface, you have far more urgent concerns than the sunburn!", as for being within a robust moonsuit is essentially still nearly butt naked if you're having any contest between yourself and that of an arriving 30+km/s speck of dust. Consider the ratio of crater diameter per size of meteorite and lo and behold, you could be looking at one hell of a nasty hole in your moonsuit, or perhaps at the very least a hefty dent that should easily knock you onto your moonsuit butt. Thus a mere spec of sand might easily become termination of life as you know it, whereas the head-on velocity of some of those specs of sand can become worth 100 km/s. Therefore the more natural plus artifically generated atmosphere the better, even it it's got a good amount of the radon(Ra-222) element as a portion of that surface atmosphere. In fact, for the sake of defending yourself, the more radon gas the better. If anything, my robust LSE-CM/ISS is all about the viable aspects of eventually colonizing our Moon. For starters having the LSE up and running is certainly a good thing, whereas from that point on we could easily pulverise the moon with itself, thus releasing megatonnes of O2/year from the raw basalt that's getting efficiently vaporised by merely releasing a tonne at a time of lunar basalt away from being roughly 60,000 km off the deck, thus without a kg of rocket fuel or any other form of dedicated propulsion we'd obtain at the very least a 1000:1 ratio of each impact making O2 available. Therefore, per tonne as having been gently tossed away from a few km below the CM/ISS that's residing roughly 64,000 km off the deck would potentially release 1000 tonnes of O2, whereas eventually this mostly robotic process of perhaps releasing 3t/24 hrs would create and sustain perhaps as much as 0.17 bar that's quite possibly breathable, that is if the lower atmospheric layer of radon gas isn't remaining quite as extensive as some have thought. However, life should be good within the 50e6t CM/ISS abode or that of keeping yourself sequestered 15+ meters deep and/or within hollow rilles or hopefully a few ready-made geode pockets that could be easily reconfigured as underground lakes of salty water, whereas this life underground notion might be a whole lot more doable than we'd thought. BTW; earthshine isn't an insignificant amount of illumination, at roughly 50 fold greater off than what the best moonshine arrives upon the surface of Earth is actually offering a fairly good standard by which to work by, and there's even a touch of secondary IR earthshine to warm your soul. I seem to recall that moonshine is supposedly worth 0.1°C upon the surface of Earth, thus perhaps as great as shifting the average lunar nighttime surface temperature that's supposedly -153°C by +5°C worth of earthshine could be the case, which is still damn cold but, we can technically deal with being cold a whole lot easier than being too warm. Jordan; I'm not sure what you mean by "surface-tension." Did you mean to say "gravity?" Gravity is certainly another factor but not the key point of what dry quicksand surface-tension is all about. A GOOGLE search for the surface-tension of water, then try a search for the surface-tension of dry quicksand, then start running off the math as to a 1/6th gravity and that of an extremely bone dry environment that by all the regular laws of physics shouldn't clump all that well and, much less explain as to such a slight layer of dust as though the moon isn't very old nor so freaking naked to whatever's coming along. Perhaps then you tell me how your folks are going to be walking upon and/or snorkeling their way through such fluffy and perhaps electrostatic sorts of nasty stuff. I'm thinking that Russia may have rediscovered that they'll have to deal with a few slight if not nearly insurmountable glitches along the way. http://groups.google.com/group/sci.s...d/608f283f4684 39de/3e63740c002a9729?lnk=st&q=brad+guth&rnum=1#3e63740 c002a9729 Such as; Can you even moon-walk upon a surface-tension of 5 g/cm2 without sinking out of sight? Is such moon-dust actually clumping all that good, or what? (where's the hard-science?) At 1/6th G (1.623 m/s/s); what's available for compacting or otherwise binding said moon-dust? What happens as a result of mining the moon, as to the artificially created moon-dust? I believe that the task of mining our moon is even going to suck the life out of a good Russian robot, that is unless you've got traction, a periscope or perhaps a good set of stilts. Because, 5 g/cm2 worth of a bone-dry quicksand surface-tension in places isn't exactly promising. As for them Russians mining the moon isn't something that's going to transpire any time soon without their first getting a good number of their moonsuit butts safely onto the earthshine illuminated lunar deck and, that's going to become just a wee bit ticky by way of having to utilizing those yet unproven fly-by-rocket landers which don't seem to actually exist, not even for the likes of any of those Russian AI/robotic landers having since provided us with little more than pop-up books depicting what supposedly transpired, that is since apparently all of their R&D as should have been easily recorded upon movie film hadn't been invented yet. Even if such fly-by-rocket landers of any reasonable payload capacity existed, or if having to R&D create such from scratch as for accommodating the task at hand, whereas per tonnage of getting whatever robotics and certainly of those moonsuit butts safely deployed upon the moon, of then having to operate such mining technology of such machines, processing and thus extracting upon whatever (such as He3) and of getting the end product packaged and shipped back towards mother Earth is per tonne going to involve at least a good 1000+ tonnes worth of nasty pollution for mother Earth, and of that 1000:1 ratio of pollution contributing factor is not to mention the horrific amounts of raw energy that such efforts will have taken from Earth in the first place, thus likely having far out-stripped any recovery potential of He3. Without their first establishing a good lunar space elevator(LSE), the lunar surface is technically going to continually suck so much worse off than we've been informed. Of physics and science as having been based upon LLPOF worth of smoke and mirrors simply isn't going to make such happen, at least not any time soon. Mining and thereby extracting whatever away from our moon sucks big time energy and dollars even for a good robotic solution unless you've got one of good traction, and perhaps one hell of a nifty periscope to boot. Operating within the sub-frozen nighttime environment of our moon, even with somewhat considerable earthshine and thereby some indirect benefit of secondary thermal influx might become the only CO2--dry-ice--CO2 (day-night-day) cycle of any method that worth improving the lunar environment that'll achieve any measurable degree of moon-dirt binding or clumping. As otherwise there's none other drier or fluffier quicksand to be found unless you're situated upon Mercury, as even a Venus class of hot and obviously bone dry quicksand isn't going to be without benefit of the local elements affording viable binders for sticking such hot and nasty Venus soil together and, much unlike that of our electrostatic powder puff of a moon, as upon Venus there's certainly not any significant forms of cosmic or solar influx of sand or meteorites that could have significantly contributed to such terrestrial depth(s) becoming whatever's Venus sand, soil or dust. In other words, I believe that Venus is mostly Venus unless you're talking about a time before things got all geologically hot and nasty and subsequently developed that absolutely terrific atmospheric shield. Perhaps the mostly Russian Venus Express mission will help to further define as to whatever's what with regard to the various depths and composition(s) of the otherwise geologically hot and nasty Venus soils, plus identifying a few of those likely active lava and/or mud flows plus S8 sulphur vents that should be atmospherically interactive enough for the onboard science instruments to sample. The Next Lunar Rover; may still manage to sink itself out of sight http://ares.jsc.nasa.gov/HumanExplor...BeyondLEO/leo1 94/rover.htm Having a dry mass of under 1000 kg and having six extremely large traction wheels seems a whole lot more doable, that is as long as their conditional laws of moon-physics of such nasty dust/soil remains as a relatively thin coating that's somehow magically clumping within the first 12.5 mm and apparently comprised of entirely nonreactive substance like nowhere other. However, along with accommodating another 1000 kg of payload brings the tally to nearly 2000 kg, thus 333 kg divided upon 6 wheels is still counting upon 56 kg/wheel which is at least getting somewhat suggestive of what darn little mass that supposedly thin layer of such nicely auto-clumping moon-dirt of lunar cornmeal and portland cement can manage to support, and that's for using wheels offering better than 6 fold the surface contact area, thus in total accomplishing the task at roughly 10 times the traction of what those original Apollo rovers had to work with. Terrestrial ROLLING RESISTANCE isn't quite the same thing as for the moon. http://www.perfnet.com/haul_truck_83...ization/introd uction_and_definitions.htm The following link provides us with a nifty traction and required energy calculator, although terrestrial based but otherwise especially interesting if using their "Sand Dune(.16)" consideration as to what a 150 kg tractor + 150 kg trailer for a combined mass of 300 kg represents at various grades. I also used 10 mph and 100 seconds as for the acceleration factor, zero ballast and a grade of 10%. You may want to utilize an overall efficiency of 0.25 instead of 0.85 just for good measure. http://www.talbertmfg.com/index2.html This is assuming and thus based upon a reasonable set of two extra/double-wide or that of the usual four large diameter and wide enough driving tires/axle of good tread design that are not sinking into whatever substance as being driven upon. It's obviously not considering the much lighter fluff or far less clumping nature of whatever actual moon-dust is all about, which may actually represent another factor of extremely slight moon-dust buoyancy issues as much as less surface-tension since their no good reason for such dust to have compacted, nor at least in any known manner of physics as for clumping that substance under the absolute best of situations wouldn't sustain more than 50 g/cm2 unless there's only a relatively thin layer of such moon-dust and/or sufficiently nearby bedrock upon which to drive. Whereas a wise assumption of unsupported and thus unclumping surface-tension might be a bit closer to 5 g/cm2. BTW; the absolute driest of our terrestrial sand dunes would still have a million fold more moisture content as for their accommodating whatever binding degree of soil/sand clumping, thus walking and/or having to drive upon such a terrestrial substance that leaves no footprints nor of even sustaining any trace of tire tracks for long is still a surface-tension that's considerably better off than what even a 1/6th gravity and certainly more than bone dry situation upon what our scorching hot and otherwise terribly solar and cosmic reactive moon has to offer. Keeping in mind, that if Earth didn't have the magnitosphere and a sufficiently thick amount of atmosphere, Earth too would be even more reactive because of the average densitiy being greater than that of the moon. Thus if the moon is not reactive in your good book it's because of having a sufficient atmosphere. So make up you mind, does it or doesn't have an atmosphere? According to http://www.talbertmfg.com/index2.html Supposedly sand upon Earth terrain that's bone dry (least clumping) offers a flat surface rolling amount of extra resistance being worth 15%, whereas without taking into account as for tires sinking into said sand but just for going the least bit vertical adds considerable insult to injury, meaning that the rolling resistance can easily double due to a loss of traction and thus wheel spinning. A 10% grade upon a hard and smooth surface represents another 10% worth of base energy required for the same task of moving a given tire upon whatever asphalt/concrete substance, whereas on a truly lose sand or lunar composite dust that your tires have been sinking into may more than double if not require four times that ratio. "The degree of traction between the tire and the ground is called the coefficient of traction." "Since there is never 100 percent adhesion, the coefficient is always less than 1.0. The result of multiplying the weight on the drive axle times the coefficient of traction represents the maximum force which can be transmitted before the tire spins out." "For example, a vehicle with 200,000 kg of weight on the drive axle and working on ground conditions having a coefficient of traction of 0.6 can deliver up to 120,000 kg (200,000 kg × 0.6) of force before the tires will spin out." Given roughly 1000 cm2 per set or pair of over-enlarged moonboots as having to walk upon such dusty locations offering a surface tension worth 50 g/cm2 represents that a given moonsuit EVA that's worth 25 kg should be doable at representing 25 g/cm2, although upon one moonboot foot at a time or perhaps 500 cm2 applied per step would be having to support the entire 25 kg is going to become nearly equal to whatever the best possible surface-tension that's supposedly capable of clumping moon-dirt eventually supporting at greater than 50 g/cm2, which represents that whatever moon-walking may require somewhat enlarged footprints that could represent a pair of clown shoes or those of compact snowshoes unless the hard stuff is always an inch or so below the dusty surface. I'm thinking that, Even though the surface-tension is perhaps worthy in certain places of supporting as much as 0.05 kg/cm2, in other places this may be somewhat like having to walk through a dry fluff density of powder snow, in that each step will have you sinking through the more than likely a 5 g/cm2 composite of moon-dust before that amount of magic clumping moon-dirt worth of soil compression becomes worthy of sustaining even that 5 g/cm2 amount of surface-tension and thus becomes all that usable, thereby any rolling tire or other flat tread like tire or belt/tred is going to be transferring a great deal of material up and around that form of wheel/tire traction, whereas a camel like traveling machine might prove more acceptable, especially if it had six legs that were long enough so as to keeping it's payload and passengers above the thick dust that has got to be worth 10+ meters in places. Traveling via robotic (six legged) moon-camel isn't all that far fetched. Say if each of the six legged machines offered a m2 cupped foot per leg, as that's potentially giving 6 m2 or 60,000 cm2 to work with. At half-loading is where that amount of area becomes worth 30,000 cm2, upon which 0.05 kg/cm2 = 1500 kg of moon mass or 9t Earth mass, although I seriously have my doubts we'll actually have nearly as good as 50 g/cm2 to work with unless you've bottomed out. A traction tread/belt as having perhaps 10 m2 of a working amount of surface contact should do as well if not a bit better as long as it's submerged operating depth capacity isn't limited. Thus 100,000 cm2 X 0.05 kg/cm2 = 5,000 kg or at the same half-load capacity of 15t Earth mass. As background info; excluding factors of buoyancy, at 1G the terrestrial surface-tension of warm water is 72 dynes/cm. That's worthy of just 7.34e-2 g/cm2. Obviously terrestrial dry-quicksand is offering a great deal more surface-tension plus a better displacement degree of buoyancy, although uncompacted moon-dust may not support a surface-tension much better than 5 g/cm2. Dry Quicksand http://www.absoluteastronomy.com/enc..._quicksand.htm "Lohse found that a weighted ping pong ball (radius 2cm, mass 133g), when released from just above the surface of the sand, would sink to about five diameters. Lohse also observed a "straight jet of sand [shooting] violently into the air after about 100 ms". Objects are known to make a splash when they hit sand, but this type of jet has never been described before." That's roughly a total ball surface area of 50 cm2. Dividing that by 3 offers at most 17 cm2 worth of a supportive surface area that's having been somewhat offset by a slight buoyancy factor since the above weighted ball submerged itself to roughly a depth of 20 cm before being supported. As then we can deduce the notion that a 133 g mass had eventually obtained a dry-quicksand surface tension worthy of not more than 7.8 g/cm2, or 46.8 g/cm2 worth of terrestrial mass as having been situated upon the moon could become the case. However, being that the same dry-quicksand as otherwise situated within the same 1/6th G environment should also be taken into account, thus perhaps at the very optimum best 10 g/cm2 is about all we're ever going to obtain. Thereby not going by my previous 50 g/cm2 but having to use 10 g/cm2 if not 5 g/cm2 to safe should become the wise alternative as for keeping your moonsuit butt and head above such obviously extremely dry-quicksand of the moon, especially wise if that's having to involve the compression ratio of 5:1 as being worth taking note of. As for getting those two reasonably hefty moonsuits and especially of their lander at something that amounted to nearly 16 tonnes resting nicely upon 4 pads that looked as though each offered roughly a square meter (10,000 cm2/pad), thereby having to accommodate 675 kg/pad that barely managed to compress past the first inch is suggestive of their having 6 out of six times set their fly-by-rocket craft down upon a relatively firm surface-tension of something that's certainly indicating as better than 100 g/cm2. This is either quite unexpected or damn lucky since in places the surface-tension could have been less than 5 g/cm2 and otherwise at most 10 g/cm2, and of course their next generation lander that's getting proposed is going to have to become extremely robust for taking a payload of perhaps 3 astronauts plus a rather substantially larger and thus more of everything rover that's at least twice the capacity of what our Apollo teams had to work with, thus a combined terrestrial mass of certainly not less than 24 tonnes and most likely with the necessary de-orbit and down-range plus sufficient (what-if) spare fuel and the third person accommodation making it worth 27 tonnes, which computes out to 1125 kg/pad. Thus even with each 4 m2 landing pad is still having to bet the farm upon setting down upon a dry quicksand surface-tension of better than 28 g/cm2, which by all logic and certainly of the known laws of physics simply may not exist unless we're talking about mostly bedrock or at least situated upon significant piles of impact related shards that are sufficiently vertical in slope so as to have since been blown nearly clean by some 1200+km/s solar winds, that which should have easily reached and reacted with the surface if there's actually as slight of atmosphere as having been reported. I believe getting this task of whatever safely to/from the moon surface down to a bit more realistic measure requires a lunar space elevator: Of any such new and "improved lunar landing architecture" certainly needs exactly what the LSE-CM/ISS infrastructure has to offer, that is unless we're talking about one-way tickets to ride. As per the task of terraforming our moon into becoming a bit more robotically obtainable is certainly a doable task without ever risking a single astronaut. Jordan; The Moon is _not_ particularly "radioactive." In fact it is _less_ radioactive than is the Earth. Please offer your basis (other than based upon those NASA/Apollo bible scriptures) for this conclusion because, even NASA's new guard has science published as to the average lunar bedrock that is considerably more "radioactive" than upon Earth. Thus instead of our receiving a local geological based dosage of 0.5 mr/day, as per existing here upon Earth, you'd be looking at several mr/day, plus whatever's cosmmic and solar contributed, plus whatever's of secondary/recoil dosage that's smack dab in the hard-X-ray spectrum and, every time earth is situated directly between yourself and the sun is when you'll get an extra taste of what our outter most Van Allen zone of death can contribute, as somewhat the lunar SAA sort of booster TBI shot. All and all, if things should get a little bit testy, having banked bone marrow should save the day. Jordan; I don't have a _clue_ as to what you mean by "reactive" in this context. Search for secondary/recoil radiation, or perhaps secondary/recoil photons. You'll find more info than this usenet cold hope to store. Basically the direct solar radiation for the most part isn't of what's going to nail your sorry DNA/RNA hide to the wall, although a quick shot of whatever's being expedited along by a 1200~2400 km/s solar wind isn't even a fair contest because, your DNA will lose big-time. Nope, still no clue penetration into the guthbrain. [guth links flushed] -- Official Associate AFA-B Vote Rustler "The original human being was a female hermaphrodite with both male and female genitalia." "Human beings CAN NOT live in a solar system without a sun with a ferrite core and a planet without a solid iron core." -- Alexa Cameron, Kook of the Year 2004 |
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Roboposters of disinformation and of their beeing mainstream status quo
damage-control cops like Art Deco and his incest cloned borg collective might actually know more than yourself "pantel", as they certainly know far more than any God that I've ever heard of. They just don't want to share and share alike, other than sharing as much masty flak as they can muster. As usual, I'm one of the usenet village idiots that's never quite sure about many such things; such as, should this one become another usenet topic or sub-topic? KODAK's PHOTOCHROMATIC/AI FILM TO THE BLOODY RESCUE of NASA's SORRY BUTT For mere starters, the Kodak grey card offers a neutral albedo of 0.18(18%), which is somewhat similar to that of new PVC gray pipe (mid tone as illuminated by the atmospherically filtered sunlight and subsequently perceived by the human eye). A lunar form of 12% albedo as a gray-scale tone is getting more into a mid-charcoal or deep slate gray. Photographic examples of albedo as based upon various real world cement/concrete composites, each image having the 18% gray background as color and albedo reference. http://www.epa.gov/heatisland/resour...ce_chap3&4.pdf Because I'm such a nice guy, I've often used the earthshine albedo/flux as being a conservative 50 fold that of moonshine. However, the full Earth along with a typical amount of cloud cover being worth nearly aan lbedo of 38% can actually represent a bit more like 80 times better off than moonshine upon the surface of Earth. Thus 80+lux or lumena or perhaps roughly 8.5 w/m2 and, each watt/m2 (depending upon spectrum or frequency) can contribute 3.8e18 photons/s, thus portions of nighttime upon our moon is getting quite nicely illuminated by earthshine. Earthshine is also somewhat of a bluish tint and thus offers by fare the most sensitivity as to being photo recorded upon film that's extremely extra sensitive to the blue and near-blue spectrum, that which the human eye isn't all that sensitive to, thus all such photographics should have been impacted by their being a fairly noticeable degree of a bluish shift or tint, and/or at the very least the as-is blue of any American flag should have been a fluorescent (extra bright illuminating) glowing amount of blue. http://cc.ysu.edu/physics-astro/star...arch22003.html "The light from the full Earth as seen from the Moon is about 80 times brighter than the light of the full Moon from the surface of Earth." As for "The solar radiation spectrum and Transmission through different media" http://almashriq.hiof.no/lebanon/600...drc/01-09.html http://almashriq.hiof.no/lebanon/600...drc/10-19.html Terrestrial surface UV-a contributes 0.6 to 1.5 mw/cm2 (6 w/m2 to 15 w/m2) as having been extensively filtered/moderated by our atmosphere, however much less of the UV-b get through and almost none of the UV-c passing through the atmospheric gauntlet that's keeing us alive by doing such a good job of being our radiation shield that's worth roughly 10t/m2, but even that's worth a whole lot mot than any artificial methods such a water that's a thousand fold more dense and thus a whole lot more secondary/recoil capable of generating those nasty hard-X-rays. A bright-white moonsuit offers an albedo of 80%, although with extra brighteners (retroreflective additives or micro prism like chemical elements) can push most any super-white moonsuit to better than 85%. An ultra white photo reflectance board is officially worth 0.9(90%) albedo. Truly retroreflective elements of a micro corner cube like coating of such additives can exceed 0.95(95%) albedo, and from that point on it'll take polished aluminum in order to exceed the 0.95 mark. Thus it's reasonably safe to conclude of moonsuits and a good number of white painted items of those Apollo missions can and should be utilized as the albedo reference bench mark, that plus those official photographic gray-scale strips that were actually incorporated within certain images is obviously offering us yet another observational validation as to how gosh darn reflective the average lunar landscape of 55+% for as far as the unfiltered Kodak eye could see was the case, with certain areas or patches as having clearly exceeded 65% (a few even seem nearly a glaring 75%) as compared to a given moonsuit plus other artificial items that we know of for certain were of 80% albedo, and also because supposedly there's insufficient atmosphere as for moderating the illumination intensity and/or having color/spectrum shifting affect upon whatever was included in each of the frames. However, without an atmosphere and taking on the the raw solar UV influx of 118 w/m2 that simply had to have been reacting with everything in sight, plus fairly darn good chances of some of that UV energy creating the near-blue photons of exactly what the secondary/recoil photons should have been creating is somewhat of a mystery, since in none of the images was there any hint of a bluish color skew or that of any black-light generated near-blue, not even fringing of blue or under any direct lighting, shadow or shadow-fill (thus secondary) illumination offered us an example of what the raw solar influx should have provided, especially as being photo recorded without and color spectrum blocking filters or even that of an optical sharp UV cut-off filter, yet the Kodak film somehow managed to exclude all of the UV-a, extra solar near-blue, secondary near-blue and even the bluish earthshine had a zero affect upon what had been recorded. In other words, apparently Kodak had invented their first full-spectrum photochromatic/AI film and ever since having lost that formula. OK folks, someone walked upon a nearly colorless/monotone moon that simply wasn't our moon, thus we're even better at this space-race game and of all the required talents and expertise than anyone ever thought possible, so damn good that we even tossed out all of the fly-by-rocket R&D and every one of the working prototypes. Apparently the moon we'd walked upon had a Xenon spectrum illuminating sun, that of an Earth like planet that was either a bit smaller and/or much further away and at times even having been situated a bit near the horizon, that plus there was no such nearby Venus or the likes of any extremely Kodak bluish-white bright Sirius star system. On this other moon there wasn't but at most a couple of inches of highly clumping moon-dirt that offered nearly 100 g/cm2 worth of easily compacted surface-tension, and lo and behold, it wasn't even the least bit electrostatic nor even all that dark because, the nearby sun had little if any iron or carbon to spare. To top all of that off is that the moon had an invisible atmosphere that nicely protected astronauts from being physically nailed or even the least bit TBI impacted, whereas this was accomplished in part because the density of that moon wasn't the least bit reactive because it must have been made of anti-matter, clumping anti-matter none the less. Silly me, as here I'd though we'd been snookered, when in fact these NASA/Apollo guys are freaking wizards that are beyond any known realms of the ordinary laws of physics. I guuess you don't need any stinking remorse if you're damn near a God like our resident warlord(GW Bush). ~ Life upon Venus, a township w/Bridge & ET/UFO Park-n-Ride Tarmac: http://guthvenus.tripod.com/gv-town.htm The Russian/China LSE-CM/ISS (Lunar Space Elevator) http://guthvenus.tripod.com/lunar-space-elevator.htm Venus ETs, plus the updated sub-topics; Brad Guth / GASA-IEIS http://guthvenus.tripod.com/gv-topics.htm War is war, thus "in war there are no rules" - In fact, war has been the very reason of having to deal with the likes of others that haven't been playing by whatever rules, such as GW Bush. |
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