This part is from UTech Nuclear Science Ink.
cost:
21650
mass:
4.5
category:
Engine
TechRequired:
heavyRocketry
engine_data:
standard
{"isp"=>{"vac"=>28900.0, "atmo"=>0.0}, "propellant_ratios"=>{"DeuteriumFuel"=>1.3, "Helium3Fuel"=>1.0}, "max_thrust"=>290.0}