Kerbodyne KR-2L+ "Rhino" Liquid Fuel Engine

From Kerbal Space Program Wiki
Jump to: navigation, search
Kerbodyne KR-2L+ "Rhino" Liquid Fuel Engine
Part image
Liquid fuel engine by

Radial size Extra large
Cost (total) 25 000.00 Funds
Mass (total) 9.00 t
Drag 0.2
Max. Temp. 2000 K
Volume  ?
Impact Tolerance 7 m/s
Research Tech tree very heavy rocketry.png Very Heavy Rocketry
Unlock cost 68 000 Funds
Since version 0.23.5
Part configuration part.cfg
Liquid fuel engine
Maximum thrust (1 atm) 1 205.88 kN
(vacuum) 2 000.00 kN
Isp (1 atm) 205 s
(vacuum) 340 s
Fuel consumption 119.97 Units of fuel/s

Thrust vectoring 4 °
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 Kerbodyne KR-2L+ "Rhino" Liquid Fuel Engine is an extra large liquid fuel engine which has high thrust and a high vacuum specific impulse. In atmosphere, its specific impulse is lower than other high thrust engines like the Mainsail. But in vacuum, the Rhino's Isp matches the efficient Dart, and is only outdone by the Terrier, NERV, and Poodle, which have respectively just 3%, 3%, and 12.5% of the Rhino's thrust.

Unlike the Mammoth, which is the only engine with higher thrust, the Rhino has an attachment node on the bottom. This, along with its high vacuum Isp and thrust, makes the Rhino a very useful engine for high-mass upper stages.

The KR-2L might be a reference to the J-2X, an upper stage engine that was intended for the cancelled Constellation program and later proposed for the Space Launch System.

Though each engine only counts as one part in-game, since the Mammoth is composed of four Vector engines, and the Twin-Boar uses two KR-1 engines, the Rhino is technically the largest single engine in the game.

Product description

This engine is Kerbodyne's first attempt at a highly advanced engine. The engineers couldn't get it to produce full efficiency at sea level without the engine exploding, so it was repurposed as an upper stage engine. The experience gained here with high efficiency has been repurposed for later models, which feature multiple combustion chambers at higher pressure (that don't go boom). This engine is optimized for lighting mid-flight, although it still provides respectable power at sea level.



  • Specific impulse at sea level decreased from 255 to 205.
  • Cost increased from 21000 to 25000, mass increased from 8.5 to 9, specific impulse at sea level increased from 170 to 255.
  • Cost increased from 2850 to 20850 (and made meaningful)
  • Initial release