E
exoscientist
Guest
I was looking up info on the RD-0120 analogue of the shuttle SSME's when I came across this:
Energia EUS.
"Lox/LH2 propellant rocket stage. Loaded/empty mass 77,000/7,000 kg. Thrust 1,962.03 kN. Vacuum specific impulse 455 seconds."
http://www.astronautix.com/stages/eneiaeus.htm
But this is a better than 10 to 1 mass ratio for an LH2/LOX engine. That's sufficient for a SSTO.
Actually the Energia core also appears to have SSTO capability:
Energia Core.
"Lox/LH2 propellant rocket stage. Loaded/empty mass 905,000/85,000 kg. Thrust 7,848.12 kN. Vacuum specific impulse 453 seconds."
http://www.astronautix.com/stages/eneacore.htm
Bob Clark
Energia EUS.
"Lox/LH2 propellant rocket stage. Loaded/empty mass 77,000/7,000 kg. Thrust 1,962.03 kN. Vacuum specific impulse 455 seconds."
http://www.astronautix.com/stages/eneiaeus.htm
But this is a better than 10 to 1 mass ratio for an LH2/LOX engine. That's sufficient for a SSTO.
Actually the Energia core also appears to have SSTO capability:
Energia Core.
"Lox/LH2 propellant rocket stage. Loaded/empty mass 905,000/85,000 kg. Thrust 7,848.12 kN. Vacuum specific impulse 453 seconds."
http://www.astronautix.com/stages/eneacore.htm
Bob Clark