Vernor Engine

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Revision as of 06:49, 19 July 2014 by UmbralRaptor (talk | contribs) (*release info.)
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Vernor Engine
Part image
Reaction Control System by
Reaction Systems Ltd
Radial size Radial mounted
Cost (total) 150.00 Funds
Mass (total) 0.08 t [N 1]
Drag 0.01 [N 1]
Max. Temp. 2000 K
Impact Tolerance 15 m/s
Research Tech tree large control.png Specialized Control
Unlock cost 1 800 Funds
Since version 0.24
Part configuration vernorEngine
Maximum thrust (1 atm) 6.46 kN
(vacuum) 12.00 kN
Isp (1 atm) 140 s
(vacuum) 260 s
Fuel consumption 0.94 Units of fuel/s

Thrust vectoring × No
Thrust vectors 1 (zenith)

  1. 1.0 1.1 The mass and drag are from the part config, but the game handles it massless/dragless.

The Vernor Engine is the first stock reaction engine which does use the liquid fuel/oxidizer mixture but works like a RCS engine. Instead of being throttleable like all other stock engines using liquid fuel and oxidizer this engine reacts to movement commands for the normal RCS. Because the SAS does use the RCS if activated, the engines have a varying thrust when compensating rotation.

To the other two RCS engines previously available, this new engine has a higher specific impulse in atmosphere which makes them suitable to steer heavy craft while ascending. The thrust is also 12 times higher than one RCS port which allows only few thrusters to stabilize the craft. Because it does use liquid fuel and oxidizer the same fuel flow logic applies. Thus the part needs to be connected to a tank either directly or by a fuel transferring part.

The name seems to be a play on Vernier thruster which are used in real life like this part to control the craft.

Despite the listed mass, the part has the "PhysicsSignificance = 1" flag, and is therefore massless and dragless.


  • Initial release