This part is from eisenhower-astronautics
cost:
400
mass:
1.24
TechRequired:
generalRocketry
engine_data:
standard
{"isp"=>{"vac"=>318.0, "atmo"=>294.0}, "propellant_ratios"=>{}, "max_thrust"=>494.0}
rd191engine
{"isp"=>{"vac"=>337.0, "atmo"=>311.0}, "propellant_ratios"=>{"LiquidFuel"=>0.9, "Oxidizer"=>1.1}, "max_thrust"=>525.0}
