This part is from Commonwealth Rockets - Stockalike British Rocketry
cost:
1500
mass:
1.0
TechRequired:
advRocketry
engine_data:
MainNozzles
{"isp"=>{"vac"=>324.0, "atmo"=>108.0}, "propellant_ratios"=>{"LiquidFuel"=>0.9, "Oxidizer"=>1.1}, "max_thrust"=>183.0}