This part is from Chaka Monkey Exploration Systems
cost:
2000
mass:
2.25
category:
Propulsion
TechRequired:
advMetalworks
engine_data:
RL-10A4-2
{"isp"=>{"vac"=>480.0, "atmo"=>300.0}, "propellant_ratios"=>{"LiquidFuel"=>0.9, "Oxidizer"=>1.1}, "max_thrust"=>486.0}