What could the Kozlov’s Aerosmena project blimp add to fuel saving if space rockets were launched from it? Where would you place the rocket and airship on this chart?
If a rocket using cryogenic fuel and oxidizer is launched from a blimp, no fuel will be saved.
During the blimp flight from ground to launch height, the rocket will loose a lot of fuel by evaporation.
A rocket to reach an orbit at 400 km height and 8 km/s speed saves only very, very little fuel when launched from about 10 km height provided by a blimb.
So much more fuel is wasted by evaporation than saved by the increased launch height.