This part is from Realism Overhaul
cost:
0
mass:
1
category:
Engine
TechRequired:
basicRocketry
engine_data:
standard
{"isp"=>{"vac"=>267.0, "atmo"=>235.0}, "propellant_ratios"=>{"PBAN"=>1.0}, "max_thrust"=>4092.0}
SC-MSRM
{"isp"=>{"vac"=>268.5, "atmo"=>243.0}, "propellant_ratios"=>{"PBAN"=>1.0}, "max_thrust"=>14780.0}