Nuke Posted July 13 Share Posted July 13 not nominal = you need to burn most of your propellant to put it where its supposed to be, shortening on-orbit life. otherwise they go to the home for wayward starlink satellites = anywhere they land. Quote Link to comment Share on other sites More sharing options...
RCgothic Posted July 13 Share Posted July 13 (edited) Using sat thrusters to recover a useful orbit is pretty much exactly how JMcD defines "useable". Edited July 13 by RCgothic Quote Link to comment Share on other sites More sharing options...
StrandedonEarth Posted July 13 Share Posted July 13 My overriding concern is how long this will ground the mighty Falcon 9, considering that it was a second stage issue, which is new every time. Quote Link to comment Share on other sites More sharing options...
darthgently Posted July 14 Share Posted July 14 I wonder if they are considering trading some payload for more thrust and/or propellant to mitigate these possibilities Quote Link to comment Share on other sites More sharing options...
tater Posted July 15 Share Posted July 15 Static fire of B12 Quote Link to comment Share on other sites More sharing options...
darthgently Posted July 15 Share Posted July 15 4 hours ago, tater said: Static fire of B12 Not as exciting as the recent dynamic static fire in the far east, but awesome just the same. Not bad for merely being of partial duration. Imagine the acceleration if those clamps failed with such a huge TWR given no SS and probably only partially fueled like that. Could really show China how a true dynamic static test is done, by golly Quote Link to comment Share on other sites More sharing options...
tater Posted July 15 Share Posted July 15 Quote Link to comment Share on other sites More sharing options...
Ultimate Steve Posted July 15 Share Posted July 15 20 minutes ago, darthgently said: Imagine the acceleration if those clamps failed with such a huge TWR given no SS and probably only partially fueled like that. Could really show China how a true dynamic static test is done, by golly If super heavy is 200 tons with 200 tons of propellant, the TWR would be about 19. Quote Link to comment Share on other sites More sharing options...
darthgently Posted July 15 Share Posted July 15 2 hours ago, Ultimate Steve said: If super heavy is 200 tons with 200 tons of propellant, the TWR would be about 19. That would be spectacular Quote Link to comment Share on other sites More sharing options...
JoeSchmuckatelli Posted July 15 Share Posted July 15 9 minutes ago, darthgently said: That would be spectacular I've already seen it go boom. Now I want to see it not go boom. Quote Link to comment Share on other sites More sharing options...
Nuke Posted July 16 Share Posted July 16 lets hope their roll control is top notch. Quote Link to comment Share on other sites More sharing options...
magnemoe Posted July 16 Share Posted July 16 21 hours ago, Ultimate Steve said: If super heavy is 200 tons with 200 tons of propellant, the TWR would be about 19. I guess they triple checked the hold down clamps and hard points on ship to ensure no unplanned flights. Did they not add extra hold down wires to the top on earlier tests? And obviously an kill trust if any of the clamps got issues. Thought earlier about what would happen if one of the clamps did not release, I say either the clamp or the hardpoint on ship would give very fast. Quote Link to comment Share on other sites More sharing options...
tater Posted July 17 Share Posted July 17 Quote Link to comment Share on other sites More sharing options...
darthgently Posted July 17 Share Posted July 17 49 minutes ago, tater said: I came here post this. Ha Quote Link to comment Share on other sites More sharing options...
RCgothic Posted July 17 Share Posted July 17 I wonder how much DV that dragon has as an independent vehicle Quote Link to comment Share on other sites More sharing options...
darthgently Posted July 18 Share Posted July 18 3 hours ago, RCgothic said: I wonder how much DV that dragon has as an independent vehicle Lunar tourist flybys would be cool Quote Link to comment Share on other sites More sharing options...
Ultimate Steve Posted July 18 Share Posted July 18 3 hours ago, RCgothic said: I wonder how much DV that dragon has as an independent vehicle They were kind enough to give us all of the info, I forget where, but presumably at the presentation they did. 30 tons wet, 16 tons of fuel. At least at the last time they gave us the numbers, Draco has 300s of isp. 2.24km/s. Falcon Heavy expendable would leave this in lko with about 30 tons of propellant left in s2. That would be roughly 2350m/s. Allowing for slop, this craft could reach a Moon flyby with 1440m/s remaining. That's comparable to Orion. Granted you can't just straight up put crew on this as it would probably not have a functional abort system due to the trunk depending on how it is attached. But this could very well be an audition to replace Orion. Quote Link to comment Share on other sites More sharing options...
Minmus Taster Posted July 18 Share Posted July 18 8 hours ago, tater said: Very Kerbal looking, guessing that the capsule portion isn't reusable Quote Link to comment Share on other sites More sharing options...
bigyihsuan Posted July 18 Share Posted July 18 1 hour ago, darthgently said: Lunar tourist flybys would be cool I wonder what the fastest trajectory is to the Moon and back? Free-return trajectory and 5 days (Apollo 13)? Imagine taking the week off of work for a casual swing-by of the Moon Quote Link to comment Share on other sites More sharing options...
tater Posted July 18 Share Posted July 18 Tower 2 Quote Link to comment Share on other sites More sharing options...
Nuke Posted July 18 Share Posted July 18 which one is going to be sacrificed to the rocket catching gods? Quote Link to comment Share on other sites More sharing options...
tater Posted July 18 Share Posted July 18 2 hours ago, Nuke said: which one is going to be sacrificed to the rocket catching gods? Good question. Mechazilla hungers! Quote Link to comment Share on other sites More sharing options...
tater Posted July 18 Share Posted July 18 https://twitter.com/PolarisProgram/status/1813926194510786670 Quote Link to comment Share on other sites More sharing options...
magnemoe Posted July 19 Share Posted July 19 On 7/18/2024 at 4:54 AM, Ultimate Steve said: They were kind enough to give us all of the info, I forget where, but presumably at the presentation they did. 30 tons wet, 16 tons of fuel. At least at the last time they gave us the numbers, Draco has 300s of isp. 2.24km/s. Falcon Heavy expendable would leave this in lko with about 30 tons of propellant left in s2. That would be roughly 2350m/s. Allowing for slop, this craft could reach a Moon flyby with 1440m/s remaining. That's comparable to Orion. Granted you can't just straight up put crew on this as it would probably not have a functional abort system due to the trunk depending on how it is attached. But this could very well be an audition to replace Orion. To me this lock like they have removed the heat shield and mated the capsule to the double length trunk who now is full of fuel tanks and has lots of extra drako engines. I assume they done this not only to save weight but also to have one common fuel system. Docking this will require more fuel than an normal dragon as its much heavier. Using this to the moon. Use crew version, so two fuel systems, trunk and capsule. For abort, perhaps has the trunk split halfway up. lower part holds the fuel tanks with tanks expand up into upper part who holds radiators and solar cells making the lower trunk an extra stage. Quote Link to comment Share on other sites More sharing options...
darthgently Posted July 19 Share Posted July 19 (edited) 6 hours ago, magnemoe said: To me this lock like they have removed the heat shield and mated the capsule to the double length trunk who now is full of fuel tanks and has lots of extra drako engines. I assume they done this not only to save weight but also to have one common fuel system. Docking this will require more fuel than an normal dragon as its much heavier. Using this to the moon. Use crew version, so two fuel systems, trunk and capsule. For abort, perhaps has the trunk split halfway up. lower part holds the fuel tanks with tanks expand up into upper part who holds radiators and solar cells making the lower trunk an extra stage. As long as separating capsule fuel from trunk, make the trunk methalox with vacuum raptor merlin and put the heat shield back on the capsule. So trunk is basically stage 3. Edited July 19 by darthgently Quote Link to comment Share on other sites More sharing options...
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