This part is from UTech Nuclear Science Ink.
cost:
36800
mass:
6.4
category:
Engine
TechRequired:
heavyRocketry
engine_data:
standard
{"isp"=>{"vac"=>31600.0, "atmo"=>0.0}, "propellant_ratios"=>{"name =HydrogenFuel"=>1.0, "Lithium7Fuel"=>0.92}, "max_thrust"=>920.0}