This part is from Far Future Technologies
cost:
195000
mass:
56
category:
Engine
TechRequired:
nuclearPropulsion
engine_data:
FissionPulse
{"isp"=>{"vac"=>2900.0, "atmo"=>2900.0}, "propellant_ratios"=>{"FissionPulses"=>1.0}, "max_thrust"=>5000.0}