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

Kerbodyne KR-2L+ "Rhino" Liquid Fuel Engine
Liquid fuel engine by Kerbodyne
Radial size		Extra large
Cost	(total)	25 000.00
Mass	(total)	9.000 t
Drag		0.2
Max. Temp.		2000 K
Impact Tolerance		7 m/s
Research		Very Heavy Rocketry
Unlock cost		68 000
Since version		0.23.5
Part configuration		part.cfg
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 /s
Thrust vectoring		4 °
Electricity generated		12.0 ⚡/s
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 I_sp 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 I_sp 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. — 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