RE-I5 "Skipper" Liquid Fuel Engine

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RE-I5 "Skipper" Liquid Fuel Engine
Part image
Liquid fuel engine by
Rockomax Conglomerate

Radial size Large
Cost (total) 5 300.00 Funds
Mass (total) 3.00 t
Drag 0.2
Max. Temp. 2000 K
Volume  ?
Impact Tolerance 8 m/s
Research Tech tree heavy rocketry.png Heavy Rocketry
Unlock cost 14 000 Funds
Since version 0.20
Part configuration skipperLiquidEngine_v2.cfg
Liquid fuel engine
Maximum thrust (1 atm) 568.75 kN
(vacuum) 650.00 kN
Isp (1 atm) 280 s
(vacuum) 320 s
Fuel consumption 41.43 Units of fuel/s

Thrust vectoring 2 °
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

The Rockomax "Skipper" Liquid Engine is a 2.5m liquid fuel engine used to provide thrust for medium sized rockets and middle stages. It is typically fueled by large diameter rocket fuel tanks like the Rockomax X200-32 Fuel Tank and especially Rockomax Jumbo-64 Fuel Tank.

Product description

The smaller sibling of the Mainsail, the Skipper's power rivals that of... large cities. Combining high thrust with reasonable efficiency, this engine excels when used as a mid-stage booster.

Rockomax Conglomerate


The Skipper is a large-diameter rocket engine which fills the gap between the RE-L10 "Poodle" Liquid Fuel Engine and the RE-M3 "Mainsail" Liquid Fuel Engine. It is about three times as powerful as the Poodle while in turn having a bit more than a third of the power of the Mainsail. Its fuel efficiency and mass are also in between these two; its Isp is higher than the Poodle and lower than the Mainsail at 1 atm, but lower than the Poodle and higher than the Mainsail in vacuum. This makes it a good engine for intermediate stages of heavy lift rockets.



  • New texture and variants
  • Mass decreased from 4 to 3, cost increased from 850 to 2850, specific impulse increased from 300-350 to 320-370.
  • Initial Release