Vernor Engine
| Vernor Engine | ||
 | ||
| Reaction Control System by Reaction Systems Ltd | ||
| Radial size | Radial mounted | |
| Cost | (total) | 150.00 
|
| Mass | (total) | 0.080 t [1] |
| Drag | 0.01 [1] | |
| Max. Temp. | 2000 K | |
| Impact Tolerance | 15 m/s | |
| Research |  Specialized Control
| |
| Unlock cost | 1 800
| |
| Since version | 0.24 | |
| Part configuration | vernorEngine.cfg | |
| Maximum thrust | (1 atm) | 6.46 kN |
| (vacuum) | 12.00 kN | |
| Isp | (1 atm) | 140 s |
| (vacuum) | 260 s | |
| Fuel consumption | 0.94  /s
| |
| Thrust vectoring | No | |
| Packed volume | 30 l | |
| ||
The Vernor Engine (officially known as the VR-N1ER Veer-Governor in the product description) is a RCS thruster used for craft rotation and translation. Unlike other RCS thrusters, it is fueled by liquid fuel and oxidizer.
Although it uses rocket fuel, it is not a reaction engine.
Product description
| “ | The VR-N1ER Veer-Governor, or "Vernor" Engine is an attitude control thruster. These motors are linked to RCS controls, but are powered by a Fuel+Oxidizer mix, making them significantly more powerful than MonoPropellant-powered RCS thrusters. They are fairly more bulky in comparison though, and feature only one nozzle facing outwards, although most agree that is an acceptable trade-off for the additional punch they pack. — Reaction Systems Ltd |
” |
Usage
Compared 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 a few thrusters to stabilize the craft. Because it uses 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.
Although it uses a different fuel, the Vernor Engine acts identically to monopropellant-based RCS ports, like the Place-Anywhere 7 Linear RCS Port.
Despite the listed mass, the part has the "PhysicsSignificance = 1" flag, making it a physicsless part; its mass and drag are added to the part it is mounted on.
Trivia
- The name seems to be a play on Vernier thruster which are used in real life like this part to control the craft.
Changes
- New model and texture
- entryCost decreased from 4200 to 1800
- Cost decreased cost from 1400 to 150
- Tolerance decreased cost from 50 to 15
- Initial release
References
- “Kerbal Space Program - 0.24 Early Access - Even More Updates” by Scott Manley released on July 14, 2014
