Quote:
Originally Posted by ChrisD
I have a question. For IFT4 they didn't circularise the orbit and with perigee below ground they didn't have to do a reentry burn with the vacuum engines. However, IFT5 or later they will use the Rvac engines for circularise also reentry burns, but starship doesn't have Ullage motors so how will they settle the propellant before raptor ignition?
Chris
|
Good point
Maybe Starship is using a similar system to the Space Shuttle where the tanks had Zero G collection devices that work on surface tension and allowed enough fuel to initially ignite the engine and then rely on the helium bags to do the rest under some G ???
The hot staging system looks after ullage when booster falls away.
I’m not a rocket engineer, just a retired electrical engineer
Cheers
Martin