This part is from Hermes Interplanetary Spacecraft Dev Files With WIP MaV (Credit to xxhansonmaxx & OrbitalEscape)
cost:
1500
mass:
1.25
category:
Propulsion
TechRequired:
advScienceTech
engine_data:
MAV
{"isp"=>{"vac"=>300.0, "atmo"=>280.0}, "propellant_ratios"=>{"LiquidFuel"=>0.9, "Oxidizer"=>1.1}, "max_thrust"=>175.0}
resources:
LiquidFuel
180.0
Oxidizer
220.0
MonoPropellant
300.0