This part is from rocapsules
cost:
800
mass:
4.493
category:
Propulsion
TechRequired:
generalRocketry
engine_data:
standard
{"isp"=>{"vac"=>311.0, "atmo"=>155.0}, "propellant_ratios"=>{"MMH"=>0.499, "MON3"=>0.501, "Helium"=>10.4}, "max_thrust"=>3.92}