This part is from H2
cost:
5420
mass:
0.5
category:
Propulsion
TechRequired:
heavierRocketry
engine_data:
LE9_double
{"isp"=>{"vac"=>426.0, "atmo"=>236.0}, "propellant_ratios"=>{"LqdHydrogen"=>15.0, "Oxidizer"=>1.0}, "max_thrust"=>776.0}