|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
Awesome video of the new Falcon reusable rocket launching and landing
"Behold the first test of the Falcon 9 Reusable rocket, launching and then
smoothly landing in another location--an entire rocket going up and landing back on Earth ready to be refilled and launched again. Unlike the Grasshopper, this thing is huge!" See: http://sploid.gizmodo.com/awesome-vi...284/+jesusdiaz |
#2
|
|||
|
|||
Awesome video of the new Falcon reusable rocket launching and landing
On Saturday, April 19, 2014 8:34:35 PM UTC-7, wrote:
"Behold the first test of the Falcon 9 Reusable rocket, launching and then smoothly landing in another location--an entire rocket going up and landing back on Earth ready to be refilled and launched again. Unlike the Grasshopper, this thing is huge!" See: http://sploid.gizmodo.com/awesome-vi...284/+jesusdiaz That's a terrific demonstration, as proof of accomplishing what other space agencies (including our NASA) still can not do. A truly reusable fly-by-rocket is a serious game changer. Wondering how much extra fuel was consumed. |
#3
|
|||
|
|||
Awesome video of the new Falcon reusable rocket launching and landing
In article ,
Brad Guth wrote: On Saturday, April 19, 2014 8:34:35 PM UTC-7, wrote: "Behold the first test of the Falcon 9 Reusable rocket, launching and then smoothly landing in another location--an entire rocket going up and landing back on Earth ready to be refilled and launched again. Unlike the Grasshopper, this thing is huge!" See: http://sploid.gizmodo.com/awesome-vi...able-rocket-la unchi-1564763284/+jesusdiaz That's a terrific demonstration, as proof of accomplishing what other space agencies (including our NASA) still can not do. A truly reusable fly-by-rocket is a serious game changer. Wondering how much extra fuel was consumed. Propellant usage would also be my top question -- followed by heat damage to the base of the rocket. 1. If you use such a large mass fraction of propellant backing down to landing, it loses all utility as a launch vehicle. It is nice to see that Space-X can maintain enough control to back down to a powered landing, but the utility question remains. 2. If the base gets so much heat and flame damage that it warps the structure, the vehicle is only semi-reusable. |
#4
|
|||
|
|||
Awesome video of the new Falcon reusable rocket launching and landing
|
#5
|
|||
|
|||
Awesome video of the new Falcon reusable rocket launching and landing
|
#6
|
|||
|
|||
Awesome video of the new Falcon reusable rocket launching and landing
In article ,
says... I'm going to be digging for info about the attempted water "landing" of the first stage of the Falcon used to launch Dragon last week. This is how SpaceX will demonstrate that there is enough residual fuel in Falcon to safely land following a successful launch. Both NASA and the Russians were watching this launch. From www.newspacejournal.com: When the launch does take place?be it today, tomorrow, or next week?it will be closely watched, and not just by spectators at Cape Canaveral and the usual radars and other tracking assets used for any launch. That?s because of SpaceX?s efforts to attempt to recover the vehicle?s first stage, testing maneuvers to slow down and ?land? the stage, albeit over the open ocean and not on land. ?When they do those braking maneuvers to come back and land on the surface of the ocean, those braking maneuvers will be supersonic thruster firings, which will be very similar to what we?ll have to do for braking for a large mass going into Mars,? said Bill Gerstenmaier, NASA associate administrator for human exploration and operations, in a presentation to a committee of the NASA Advisory Council on Monday, before that afternoon?s SpaceX launch attempt was scrubbed. He said NASA?s Langley Research Center would be flying three aircraft to observe those maneuvers, collecting data to incorporate into their Mars technology developments. ?So we?re actually getting data tonight to help us inform and get us ready for the entry, descent, and landing challenge of going to Mars,? he said. It wasn?t clear if the aircraft would also be on station for the launch today, given the weather conditions. While NASA watches from the air, the Russians may be watching from the sea. The Russian vessel Nikolay Chiker has been lurking in the waters off the coast from Cape Canaveral, the blog The Aviationist reported Thursday, appearing in March for earlier launch attempts and returning in time for the latest attempts. Some speculate the ship is there to monitor the Falcon 9 launch and stage recovery attempt, although it could be coincidental with other efforts, such as monitoring naval bases. Also, Elon tweeted the following on Apr 18: "Data upload from tracking plane shows landing in Atlantic was good! Several boats enroute through heavy seas." "Data upload from tracking plane shows landing in Atlantic was good! Several boats enroute through heavy seas." No word yet on whether or not the stage was found by the boats or if the boats would drag the stage back for inspection. Jeff -- "the perennial claim that hypersonic airbreathing propulsion would magically make space launch cheaper is nonsense -- LOX is much cheaper than advanced airbreathing engines, and so are the tanks to put it in and the extra thrust to carry it." - Henry Spencer |
#7
|
|||
|
|||
Awesome video of the new Falcon reusable rocket launching and landing
On Sunday, April 20, 2014 5:41:25 PM UTC-7, Orval Fairbairn wrote:
In article , Brad Guth wrote: On Saturday, April 19, 2014 8:34:35 PM UTC-7, wrote: "Behold the first test of the Falcon 9 Reusable rocket, launching and then smoothly landing in another location--an entire rocket going up and landing back on Earth ready to be refilled and launched again. Unlike the Grasshopper, this thing is huge!" See: http://sploid.gizmodo.com/awesome-vi...able-rocket-la unchi-1564763284/+jesusdiaz That's a terrific demonstration, as proof of accomplishing what other space agencies (including our NASA) still can not do. A truly reusable fly-by-rocket is a serious game changer. Wondering how much extra fuel was consumed. Propellant usage would also be my top question -- followed by heat damage to the base of the rocket. 1. If you use such a large mass fraction of propellant backing down to landing, it loses all utility as a launch vehicle. It is nice to see that Space-X can maintain enough control to back down to a powered landing, but the utility question remains. 2. If the base gets so much heat and flame damage that it warps the structure, the vehicle is only semi-reusable. Perhaps a brief refueling in LEO before attempting its fly-by-rocket landing. Of course we'd have to place a sufficient spare amount of HTP plus a little something else of a hydrocarbon on orbit first. |
#8
|
|||
|
|||
Awesome video of the new Falcon reusable rocket launching and landing
"Brad Guth" wrote in message
... On Sunday, April 20, 2014 5:41:25 PM UTC-7, Orval Fairbairn wrote: In article , Brad Guth wrote: On Saturday, April 19, 2014 8:34:35 PM UTC-7, wrote: "Behold the first test of the Falcon 9 Reusable rocket, launching and then smoothly landing in another location--an entire rocket going up and landing back on Earth ready to be refilled and launched again. Unlike the Grasshopper, this thing is huge!" See: http://sploid.gizmodo.com/awesome-vi...able-rocket-la unchi-1564763284/+jesusdiaz That's a terrific demonstration, as proof of accomplishing what other space agencies (including our NASA) still can not do. A truly reusable fly-by-rocket is a serious game changer. Wondering how much extra fuel was consumed. Propellant usage would also be my top question -- followed by heat damage to the base of the rocket. 1. If you use such a large mass fraction of propellant backing down to landing, it loses all utility as a launch vehicle. It is nice to see that Space-X can maintain enough control to back down to a powered landing, but the utility question remains. 2. If the base gets so much heat and flame damage that it warps the structure, the vehicle is only semi-reusable. Perhaps a brief refueling in LEO before attempting its fly-by-rocket landing. Of course we'd have to place a sufficient spare amount of HTP plus a little something else of a hydrocarbon on orbit first. You just made the problem much harder. The fuel you need to get the 1st stage into orbit is what you would use for landing. And if you get it into orbit, it has a LOT more energy you have to lose before landing. -- Greg D. Moore http://greenmountainsoftware.wordpress.com/ CEO QuiCR: Quick, Crowdsourced Responses. http://www.quicr.net |
#9
|
|||
|
|||
Awesome video of the new Falcon reusable rocket launching and landing
|
#10
|
|||
|
|||
Awesome video of the new Falcon reusable rocket launching andlanding
On 4/22/2014 7:39 AM, Jeff Findley wrote:
Some people are making this whole thing out to be harder than it really is. Losing a satellite, or putting it into the wrong orbit, because one out of nine engines fails is absolutely unacceptable. To mitigate this, Falcon 9's first stage*already* needs to carry extra fuel in order to handle engine out scenarios. OK I'm reaching a bit here but just for the sake of discussion... I realize that you can't anticipate every possible failure, but one risk that I see with the Space-X many-engine format is the possibility of a major engine failure taking out adjacent engines. Could there be a possibility of shuttle-style scenarios to return the rocket, payload and all, following (say) the loss of two or three engines rendering orbit impossible? Control under asymmetric thrust conditions might be one obvious deal-killer, plus the CG of the entire package would be totally different. The shroud could be sacrificed before landing to reduce weight. Second stage fuel dumping would also be theoretically possible, at the price of increased complexity. |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
SpaceX video showing Falcon 9 stages and Dragon performing avertical landing | David Spain | Policy | 14 | October 15th 11 09:51 PM |
SpaceX video showing Falcon 9 stages and Dragon performing avertical landing | Space Cadet[_1_] | Policy | 7 | October 6th 11 09:00 PM |
Large rocket engines cannot be reusable | Andrew Nowicki | Technology | 10 | December 2nd 05 07:05 AM |
SpaceX Announces the Falcon 9 Fully Reusable Heavy Lift Launch Vehicle | [email protected] | News | 0 | September 12th 05 05:21 PM |
Launching a small model rocket | Niko Holm | Space Shuttle | 10 | January 8th 04 11:48 PM |