This part is from Stockalike Realism Overhaul
cost:
2250
mass:
2.2
category:
Engine
TechRequired:
hypersonicFlight
engine_data:
standard
{"isp"=>nil, "propellant_ratios"=>{"IntakeAir"=>8.0, "LiquidFuel"=>3.0}, "max_thrust"=>1200.0}