J-90 "Goliath" Turbofan Engine

J-90 "Goliath" Turbofan Engine
Jet engine by C7 Aerospace Division
Radial size		Radial mounted
Cost	(total)	2 600.00
	(dry)	2 600.00
Mass	(total)	4.517 t
	(dry)	4.517 t
Drag		0.2
Max. Temp.		2000 K
Impact Tolerance		7 m/s
Research		Heavy Aerodynamics
Unlock cost		15 000
Since version		1.0.5
Part configuration		jetEngineBig.cfg
Intake speed		30 m/s
Intake area		3 m2
Maximum thrust		360.00 kN
Isp	(max)	12600 s
Fuel consumption		0.58 /s
Intake air consumption		132.27 /s
Thrust vectoring		No
Electricity generated		16 ⚡/s
Testing Environments
On the surface		Yes
In the ocean		Yes
On the launchpad		Yes
In the atmosphere		Yes
Sub-orbital		No
In an orbit		No
On an escape		No
Docked		No
Test by staging		Yes
Manually testable		Yes
Intake air		3

The J-90 "Goliath" Turbofan Engine is a large jet engine added with version 1.0.5 of Kerbal Space Program. It is based on the Rolls-Royce Trent 800 and the GE90 high bypass turbofan engines.

Usage

It is the only jet engine with large radial size, and built in air intake. This airliner engine's thrust and multiplier curve for velocity make this engine ideal for subsonic large Mk3 airplanes, but also limits its role this purpose. Note that this engine is capable of going into reverse, much like the J-33 "Wheesley" Turbofan Engine, which makes it useful for rapid deceleration during landing and for backing into hangars. Since aircraft are usually built with more than one of this engine, it can also be handy for making sharp turns on the ground, since one engine can be put into reverse while the other continues pushing forwards. However, reversing on one side should be avoided in flight, as severe changes in lift on certain areas of the airframe will occur, possibly leaving the flight unrecoverable.

Visualization of the thrust multiplier curve for velocity

Visualization of the thrust multiplier curve for atmospheric pressure

Product description

“

The largest and highest thrust jet engine ever built. This engine works best at low cruising speeds and altitudes. — C7 Aerospace Division

”

Trivia

• The J-90 is the only jet engine shown with moving fan/turbocompressor.
• Although this engine can run at Mach 1.5 with no problems, real-life turbofans can not go past Mach 0.89 usually due to the fact that this puts excessive stress on the mechanical components of the engine and would lead to inevitable engine disintegration. Low-bypass turbofans can go past Mach 1.0 but they quickly lose efficiency as the airspeed increases.
• No matter how many engines are on a plane, they all rotate the same direction. This would in theory cause the plane to roll in the direction of the engine rotation. This is also not represented in KSP 1.0.5.

Changes

1.0.5

• Initial release

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The table of the jet engines' thrust multiplier curves

Part	Velocity curve(s)	Atmosphere curve(s)
J-20 "Juno" 20.0 kN
J-33 "Wheesley" 120.0 kN
J-404 "Panther" Dry Mode: 85.0 kN Wet Mode: 130.0 kN
J-X4 "Whiplash" 130.0 kN
J-90 "Goliath" 360.0 kN
CR-7 R.A.P.I.E.R. 105.0 kN