This part is from lonesomerobots
cost:
3000
mass:
3.1
category:
Propulsion
TechRequired:
heavyRocketry
engine_data:
standard
{"isp"=>{"vac"=>300.0, "atmo"=>268.0}, "propellant_ratios"=>{"LiquidFuel"=>0.9, "Oxidizer"=>1.1}, "max_thrust"=>856.8}