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Great job SpaceX
Nice launch.
Alain Fournier |
#2
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Great job SpaceX
On Saturday, May 30, 2020 at 9:24:25 PM UTC-4, Alain Fournier wrote:
Nice launch. Alain Fournier This rocket is a lot bigger than it looks, it is taller than the Saturn 1B and has greater payload to low Earth orbit. |
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Great job SpaceX
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#4
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Great job SpaceX
On Sunday, May 31, 2020 at 12:32:42 PM UTC-4, Jeff Findley wrote:
In article , says... On Saturday, May 30, 2020 at 9:24:25 PM UTC-4, Alain Fournier wrote: Nice launch. This rocket is a lot bigger than it looks, it is taller than the Saturn 1B and has greater payload to low Earth orbit. Yep. Falcon 9/Merlin first stage is quite a bit more advanced than the Saturn 1B first stage (cluster's last stand) which was made from existing tanks clustered together and was therefore less mass efficient than a "clean sheet" would have been. The upper stages are just different (kerosene on Falcon upper stage versus LH2 on the Saturn), so hard to tell which one is "better". Saturn 1B is clearly old technology, I just thought it was an interesting comparison, that now we have a modern working rocket that exceeds its payload capacity. Saturn 1B was huge and it dwarfed the Titan 3C, which was a large rocket in its own right. |
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Great job SpaceX
On 2020-05-31 10:05 PM, Scott Kozel wrote:
On Sunday, May 31, 2020 at 12:32:42 PM UTC-4, Jeff Findley wrote: In article , says... On Saturday, May 30, 2020 at 9:24:25 PM UTC-4, Alain Fournier wrote: Nice launch. This rocket is a lot bigger than it looks, it is taller than the Saturn 1B and has greater payload to low Earth orbit. Yep. Falcon 9/Merlin first stage is quite a bit more advanced than the Saturn 1B first stage (cluster's last stand) which was made from existing tanks clustered together and was therefore less mass efficient than a "clean sheet" would have been. The upper stages are just different (kerosene on Falcon upper stage versus LH2 on the Saturn), so hard to tell which one is "better". Saturn 1B is clearly old technology, I just thought it was an interesting comparison, that now we have a modern working rocket that exceeds its payload capacity. Saturn 1B was huge and it dwarfed the Titan 3C, which was a large rocket in its own right. ....The times they are a'changin.... Of note: I think it was Doug H. that mentioned in yesterday's presser that F9 2nd stage was a rougher ride than shuttle when on SSME's only. It might be that combustion flow through the MVac Merlin 1D leads to more vibration of the engine, but it could also have been due to the lower overall mass of the vehicle as well. Too bad all the surviving Apollo astronauts are now too old to fly. I'd love to have had a comparison. I'd bet $ that F9 is helluva lot smoother ride than a Saturn 5 or a Saturn 1B. Can we talk Walt Cunningham into a free ticket to ISS? Heck 88 is the new 58 right? I'd get the feeling he'd say, "What? Are we even moving?" :-) Dave PS: Good job SpaceX, looked like a nice ride from what I could see. |
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Great job SpaceX
In article , says...
On 2020-05-31 10:05 PM, Scott Kozel wrote: On Sunday, May 31, 2020 at 12:32:42 PM UTC-4, Jeff Findley wrote: In article , says... On Saturday, May 30, 2020 at 9:24:25 PM UTC-4, Alain Fournier wrote: Nice launch. This rocket is a lot bigger than it looks, it is taller than the Saturn 1B and has greater payload to low Earth orbit. Yep. Falcon 9/Merlin first stage is quite a bit more advanced than the Saturn 1B first stage (cluster's last stand) which was made from existing tanks clustered together and was therefore less mass efficient than a "clean sheet" would have been. The upper stages are just different (kerosene on Falcon upper stage versus LH2 on the Saturn), so hard to tell which one is "better". Saturn 1B is clearly old technology, I just thought it was an interesting comparison, that now we have a modern working rocket that exceeds its payload capacity. Saturn 1B was huge and it dwarfed the Titan 3C, which was a large rocket in its own right. ...The times they are a'changin.... Of note: I think it was Doug H. that mentioned in yesterday's presser that F9 2nd stage was a rougher ride than shuttle when on SSME's only. It might be that combustion flow through the MVac Merlin 1D leads to more vibration of the engine, but it could also have been due to the lower overall mass of the vehicle as well. Too bad all the surviving Apollo astronauts are now too old to fly. I'd love to have had a comparison. I'd bet $ that F9 is helluva lot smoother ride than a Saturn 5 or a Saturn 1B. Can we talk Walt Cunningham into a free ticket to ISS? Heck 88 is the new 58 right? I'd get the feeling he'd say, "What? Are we even moving?" :-) Dave PS: Good job SpaceX, looked like a nice ride from what I could see. I'd guess the Saturn IB and Saturn V would be a smoother ride (same upper stage really), simply because LOX/LH2 likely makes complete mixing easier resulting in more complete combustion. But, it certainly would be more apples to apples than the shuttle due to the in-line stage design and the single engine. The shuttle had that giant, heavy, ET structure hanging off the side that likely dampened some of the vibrations (it certainly did when the SRBs were firing!). An in-line design is more likely to transmit vibrations straight from the engine to the capsule with the propellant acting to dampen a bit of that out. Remember the horrible time NASA had trying to dampen the vibrations of Ares I? That's about as bad as it gets. Giant SRB in- line with a smallish upper stage. Jeff -- All opinions posted by me on Usenet News are mine, and mine alone. These posts do not reflect the opinions of my family, friends, employer, or any organization that I am a member of. |
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Great job SpaceX
On Tuesday, June 2, 2020 at 7:34:35 AM UTC-4, Jeff Findley wrote:
In article , says... Saturn 1B was huge and it dwarfed the Titan 3C, which was a large rocket in its own right. Here's a picture I found on Reddit showing various crewed launch vehicles to scale: https://www.reddit.com/r/nasa/commen...asa_human_spac eflight/ Falcon 9 really is a beast. It doesn't look like much compared to the Saturn IB, but to quote Han Solo: "She may not look like much, but she's got it where it counts, kid." But when you compare Saturn V to SLS 1A and SLS 1B (remains to be seen if the EUS for 1B will ever be built), SLS falls short in the performance department. NASA keeps boasting that SLS is "more powerful" than Saturn V, but that's only liftoff thrust. The fact is those SRBs do have high thrust, but their casings are *heavy* and their ISP is terrible, leading to worse performance compared to something like the Saturn V's first stage (LOX/kerosene like Falcon 9). FWIW, Wikipedia has these figures, whereby payload to LEO is slightly higher for SLS Block 2. The Space Launch System (SLS) is a US super heavy-lift expendable launch vehicle. Payload to LEO. Block 1: 95 t (93 long tons; 105 short tons); Block 2: 130 t (130 long tons; 140 short tons) Fully fueled, the Saturn V weighed 6.5 million pounds (2,950,000 kg) and had a low Earth orbit payload capacity originally estimated at 261,000 pounds (118,000 kg), but was designed to send at least 90,000 pounds (41,000 kg) to the Moon. |
#9
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Great job SpaceX
Alain Fournier suggested that ...
Nice launch. Nice approach to station, too. I'm reviewing the NASA tubes of the docking (I went to bed after crew wakeup). It was hard to see thruster firings until departure from Waypoint 2. Also, am I correct that the hinge for the nose cap is on the side opposite the hatch and main window ports? /dps -- Killing a mouse was hardly a Nobel Prize-worthy exercise, and Lawrence went apopleptic when he learned a lousy rodent had peed away all his precious heavy water. _The Disappearing Spoon_, Sam Kean |
#10
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Great job SpaceX
On Sunday, Snidely queried:
Alain Fournier suggested that ... Nice launch. Nice approach to station, too. I'm reviewing the NASA tubes of the docking (I went to bed after crew wakeup). It was hard to see thruster firings until departure from Waypoint 2. Also, am I correct that the hinge for the nose cap is on the side opposite the hatch and main window ports? And the apatosaurus was in seat #4 during docking? /dps -- I have always been glad we weren't killed that night. I do not know any particular reason, but I have always been glad. _Roughing It_, Mark Twain |
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