This part is from RN R7
cost:
1200
mass:
0.1
category:
Propulsion
TechRequired:
generalRocketry
engine_data:
standard
{"isp"=>{"vac"=>550.0, "atmo"=>450.0}, "propellant_ratios"=>{"LiquidFuel"=>0.9, "Oxidizer"=>1.1}, "max_thrust"=>2.0}