This part is from KK's Delta Pack
cost:
400
mass:
0.6
category:
Propulsion
TechRequired:
advRocketry
engine_data:
S1SRB
{"isp"=>{"vac"=>225.0, "atmo"=>140.0}, "propellant_ratios"=>{"SolidFuel"=>1.0}, "max_thrust"=>175.0}
resources:
SolidFuel
300.0