Difference between revisions of "Kerbodyne KR-2L+ "Rhino" Liquid Fuel Engine"

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(Fix comparison against Mainsail (Isp is no longer equal in-atmosphere))
 
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{{:Kerbodyne KR-2L Advanced Engine/Box}}
 
{{:Kerbodyne KR-2L Advanced Engine/Box}}
  
The '''Kerbodyne KR-2L Advanced Engine''' is an extra large [[liquid fuel engine]] which has a high [[specific impulse]] compared to the thrust. While the specific impulse is lower than the [[Rockomax "Mainsail" Liquid Engine]] in atmosphere, the I<sup>sp</sup> in vacuum is higher than most of the engines, including the Mainsail and [[Rockomax "Skipper" Liquid Engine]]. Only the [[LV-N Atomic Rocket Motor]], [[Toroidal Aerospike Rocket]], [[LV-909 Liquid Fuel Engine]] and [[Rockomax "Poodle" Liquid Engine]] are more efficient, but only have 10% (at most) of this engine's thrust.
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The '''Kerbodyne KR-2L+ "Rhino" Liquid Fuel Engine''' is an extra large [[liquid fuel engine]] which has a high [[specific impulse]] compared to the thrust. While the specific impulse is lower than the [[Rockomax "Mainsail" Liquid Engine]] in atmosphere, the I<sub>sp</sub> in vacuum is higher than most of the engines, including the Mainsail and [[Rockomax "Skipper" Liquid Engine]]. Only the [[LV-N Atomic Rocket Motor]], [[Toroidal Aerospike Rocket]], [[LV-909 Liquid Fuel Engine]] and [[Rockomax "Poodle" Liquid Engine]] are more efficient, but only have 12.5% (at most) of this engine's thrust.
  
This, and the fact that it allows attaching parts on both sides of the engine, make it a very useful engine for upper stages. Especially because the [[S3 KS-25x4 Engine Cluster]] is the only other extra large engine in [[0.25]] but doesn't allow attaching parts below the engine. It has the second highest thrust of all engines available.{{Check version||0.25}}
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The ''KR-2L'' might be a reference to the [[w:J-2X|J-2X]], a planned upper stage engine for [[w:Space Launch System|Space Launch System]].
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This, and the fact that it allows attaching parts on both sides of the engine, make it a very useful engine for high-mass upper stages. Especially because the [[S3 KS-25x4 Engine Cluster]] is the only other extra large engine in [[0.25]] but doesn't allow attaching parts below the engine. It has the second-highest vacuum thrust of all engines available, after the [[S3 KS-25x4 "Mammoth" Liquid Fuel Engine]] and tied with the [[LFB KR-1x2 "Twin-Boar" Liquid Fuel Engine]], though the Twin-Boar has better atmospheric thrust.{{Check version||1.0.4}}
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The fact that the [[S3 KS-25x4 "Mammoth" Liquid Fuel Engine]], although it is on part part in-game, is technically just four [[S3 KS-25 "Vector" Liquid Fuel Engine|Vector Engines]], and the [[LFB KR-1x2 "Twin-Boar" Liquid Fuel Engine]], while only one part in-game, is technically two KR-1 Engines, makes this engine technically the largest single engine in the game.
  
 
== Product description ==
 
== Product description ==
{{Quote|This engine is Kerbodyne's first attempt at a super heavy lifting engine. Later models have been designed with multiple nozzles to prevent a single point of failure and reduce manufacturing costs.}}
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{{Quote|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.|manufacturer=KD}}
  
 
== Changes ==
 
== Changes ==
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;[[1.2]]
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* Specific impulse at sea level decreased from 255 to 205.
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;[[1.0.3]]
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* Cost increased from 21000 to 25000, mass increased from 8.5 to 9, specific impulse at sea level increased from 170 to 255.
 
;[[0.24|0.24]]
 
;[[0.24|0.24]]
 
* Cost increased from 2850 to 20850 (and made meaningful)
 
* Cost increased from 2850 to 20850 (and made meaningful)

Latest revision as of 23:09, 17 January 2019

Kerbodyne KR-2L+ "Rhino" Liquid Fuel Engine
Part image
Liquid fuel engine by
Kerbodyne
Radial size Extra large
Cost (total) 25 000.00 Funds
Mass (total) 9.00 t
Drag 0.2
Max. Temp. 2000 K
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 Size3AdvancedEngine
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 a high specific impulse compared to the thrust. While the specific impulse is lower than the Rockomax "Mainsail" Liquid Engine in atmosphere, the Isp in vacuum is higher than most of the engines, including the Mainsail and Rockomax "Skipper" Liquid Engine. Only the LV-N Atomic Rocket Motor, Toroidal Aerospike Rocket, LV-909 Liquid Fuel Engine and Rockomax "Poodle" Liquid Engine are more efficient, but only have 12.5% (at most) of this engine's thrust.

The KR-2L might be a reference to the J-2X, a planned upper stage engine for Space Launch System.

This, and the fact that it allows attaching parts on both sides of the engine, make it a very useful engine for high-mass upper stages. Especially because the S3 KS-25x4 Engine Cluster is the only other extra large engine in 0.25 but doesn't allow attaching parts below the engine. It has the second-highest vacuum thrust of all engines available, after the S3 KS-25x4 "Mammoth" Liquid Fuel Engine and tied with the LFB KR-1x2 "Twin-Boar" Liquid Fuel Engine, though the Twin-Boar has better atmospheric thrust.[outdated]

The fact that the S3 KS-25x4 "Mammoth" Liquid Fuel Engine, although it is on part part in-game, is technically just four Vector Engines, and the LFB KR-1x2 "Twin-Boar" Liquid Fuel Engine, while only one part in-game, is technically two KR-1 Engines, makes this engine 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.

Kerbodyne

Changes

1.2
  • Specific impulse at sea level decreased from 255 to 205.
1.0.3
  • Cost increased from 21000 to 25000, mass increased from 8.5 to 9, specific impulse at sea level increased from 170 to 255.
0.24
  • Cost increased from 2850 to 20850 (and made meaningful)
0.23.5
  • Initial release