Frontier Engine

Parts Expansion Required
Some or all of the parts and/or features on this page require the Parts Expansion in-app purchase.

Frontier Engine
Code name	Engine Frontier
Mass (t)	6 (Easy/Hard) 3 (Realistic)
Heat tolerance (°C)	300
Thrust (t)	100
Specific impulse (s)	290 (Easy/Hard) 435 (Realistic)
Fuel consumption (t/sec)	0.344
Gimbal angle (deg)	2
TWR	16.67 (Easy/Hard) 33.3 (Realistic)

The sound produced by the Frontier engine

The flame produced by the Frontier engine

The Frontier Engine is a high-efficiency moderate-thrust engine used mainly for the upper stages of orbital-class rockets. It is the upper-stage counterpart of the Titan Engine and the larger equivalent of the Valiant Engine. It has the second highest efficiency after the Ion Engine.

The engine most likely represents a hydrolox fuel engine, which uses liquid hydrogen alongside liquid oxygen to produce thrust. This is most readily apparent from the transparent blue hue and visible shock diamond of its plume.

Trivia

• This engine most likely represents the RS-25 SSME, Rocketdyne J-2, or the Rocketdyne J-2X.
• Before 1.5, the Frontier Engine used the Hawk Engine/Titan Engine's sound as a placeholder. This was changed in 1.5.
• Four clipped Frontier Engines can be a replacement for the Titan Engine. It consumes 18% less fuel than the Titan Engine, but it weighs twice as much as the Titan engine.

Gallery

• Exhaust until 1.35. Note a faint color difference to post-1.35's exhaust.

1/3