This part is from LongMarch-5（CZ-5）
cost:
25000
mass:
1
category:
Engine
TechRequired:
basicRocketry
engine_data:
YF77
{"isp"=>{"vac"=>310.0, "atmo"=>290.0}, "propellant_ratios"=>{"LiquidFuel"=>0.9, "Oxidizer"=>1.1}, "max_thrust"=>1100.0}
