Mk-55 "Thud" Liquid Fuel Engine
| Mk-55 "Thud" Liquid Fuel Engine | ||
 | ||
| Liquid fuel engine by Rockomax Conglomerate | ||
| Radial size | Radial mounted | |
| Cost | (total) | 820.00 
|
| Mass | (total) | 0.900 t |
| Drag | 0.2 | |
| Max. Temp. | 2000 K | |
| Impact Tolerance | 7 m/s | |
| Research |  Advanced Rocketry
| |
| Unlock cost | 3 500
| |
| Since version | 0.16 | |
| Part configuration | liquidEngineMk55.cfg | |
| Maximum thrust | (1 atm) | 108.20 kN |
| (vacuum) | 120.00 kN | |
| Isp | (1 atm) | 275 s |
| (vacuum) | 305 s | |
| Fuel consumption | 8.02  /s
| |
| Thrust vectoring | 8 ° | |
| Testing Environments | ||
| On the surface | Yes | |
| In the ocean | Yes | |
| On the launchpad | Yes | |
| In the atmosphere | Yes | |
| Sub-orbital | Yes | |
| In an orbit | Yes | |
| On an escape | Yes | |
| Docked | No | |
| Test by staging | Yes | |
| Manually testable | Yes | |
| Packed volume | None | |
The Rockomax Mark 55 Radial Mount Liquid Engine is a liquid fuel rocket engine which does not attach at a node but rather to the side of other parts, typically a liquid fuel/oxidizer tank.
Usage
The Mark 55 is the third liquid fuel engine with thrust vector control that allows efficient control of the rocket during descent and landing. The Mk55 is fairly low-thrust. This is offset by its comparatively low weight, however. The engine has a TWR comparable to the LV-T45.
The low thrust and radial mounting makes a single Mk 55 unsuitable as a main engine on most lower stages, but it can be used to augment other engines. A common use of this engine is in lander designs, as it eliminates the need to have a vulnerable engine in an easily-damaged position. The Isp of this engine is adequate, being 320 s at 1 atm and 360 s in vacuum, not far behind the LV-T30 and LV-T45.
Additionally, landing legs can be added to these engines. This is an advantage shared between radial engines, such as the LV-1R, Rockomax 24-77 and Mark 55.
As of 0.90.0[outdated], this engine has for the highest range of gimbal at 5 degrees.
Product description
| “ | After an intensive search for an engineer crazy enough to plan and build a revolutionary new engine type, researchers turned to renowned engineer Eumon Kerman, one of the top minds in the industry. He failed miserably at the job, and this is what we ended up with. | ” |
| “ | After an intensive search for an engineer crazy enough to plan and build a revolutionary new engine type, researchers turned to renowned engineer Eumon Kerman, one of the top minds in the industry. He failed miserably at the job, and this is what we ended up with. — Rockomax Conglomerate, 0.24 |
” |
Changes
- Cost reduced from 850 to 800, Isp increased from 290 vacuum / 320 atmosphere to 360 vacuum / 320 atmosphere, gimbal range increased from 3° to 5°.
- Description changed
- Mass reduced from from 1.5 to 0.9, gimbal range increased to 3°, Isp curve changed from 330 vacuum/280 atmosphere to 320 vacuum/290 atmosphere, heat production increased from 300 to 350.
- Renamed 'Mark 55 Radial mount engine' to 'Rockomax Mark 55 Radial Mount Liquid Engine'
- Thrust increased from 80 kN to 120 kN.
- Manufacturer changed from Jebediah Kerman's Junkyard and Spaceship Parts Co. to Rockomax Conglomerate.
- Initial Release
