This part is from RocketMotorMenagerie
cost:
36000
mass:
1.43
TechRequired:
veryHeavyRocketry
engine_data:
ssme50_150_vac
{"isp"=>{"vac"=>460.0, "atmo"=>200.0}, "propellant_ratios"=>{"LqdHydrogen"=>1.5, "Oxidizer"=>0.1}, "max_thrust"=>581.0}
ssme50_150_SL
{"isp"=>{"vac"=>446.0, "atmo"=>389.0}, "propellant_ratios"=>{"LqdHydrogen"=>1.5, "Oxidizer"=>0.1}, "max_thrust"=>563.0}
