Spaceflight Simulator Wiki

The Hawk Engine is a high thrust, low efficiency engine, normally used in the first stage of a rocket. It's the first stage counterpart to the Valiant Engine, and the smaller version of the Titan Engine.

Hawk Engine firing in 1.5

The engine burns 5 tons of kerolox in 7.5 seconds. On Earth, it can lift up to 115 tons.


The Hawk Engine, previously named RB-48 Liquid Fuel Engine, was the one of the first two engines in Spaceflight Simulator, the other one being the Valiant Engine.


  • This engine likely burns kerolox (kerosene and liquid oxygen), because kerolox powered engines give off an opaque plume.
  • The engine is likely based off of the real life Merlin 1D engine.

Image Gallery

Basics ParachuteCapsuleHawk EngineValiant EngineKolibri EngineFuel TanksSeparatorSide SeparatorAerodynamic Nose ConeLanding Leg
6 Wide 6 Wide Aerodynamic Nose ConeFuel TanksTitan EngineSeparator
8 Wide 8 Wide Aerodynamic Nose ConeFuel TanksSeparator
10 Wide Fuel TanksSeparator
12 Wide Fuel TanksSeparator
Engines Hawk EngineValiant EngineKolibri EngineTitan EngineFrontier EngineRCS ThrustersIon Engine
Aerodynamic Parts ParachuteSide ParachuteAerodynamic Nose ConeAerodynamic Fuselage
Fairings Fairing
Structural Structural Part
Other Docking PortLanding LegsIon EngineProbeRCS ThrustersRover WheelsSolar Panel
Currently discontinued in Version 1.5
BatteryRadioisotope Thermoelectric Generator