This part is from eisenhower-astronautics
cost:
400
mass:
1.24
TechRequired:
generalRocketry
engine_data:
rd191Vengine
{"isp"=>{"vac"=>366.0, "atmo"=>56.0}, "propellant_ratios"=>{"LiquidFuel"=>0.9, "Oxidizer"=>1.1}, "max_thrust"=>525.0}