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J-404 "Panther" Afterburning Turbofan

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J-404 "Panther" Afterburning Turbofan
Part image
Jet engine by
C7 Aerospace Division
Radial size Small
Cost (total) 2 000.00 Fund
Mass (total) 1.20 t
Drag 0.2
Max. Temp. 2000 K
Impact Tolerance 7 m/s
Research Supersonic flight.png Supersonic Flight
Unlock cost 9000 Fund
Since version 1.0.5
Part configuration jetEngines
Maximum thrust 85 kN
Isp (max) 9000 s
Fuel con­sumption 0.01 units of fuel/s
Intake air consumption 0.18 Air unit/s
Thrust vectoring 10 °
Maximum thrust 130 kN
Isp (max) 4000 s
Fuel con­sumption 0.04 units of fuel/s
Intake air consumption 0.62 Air unit/s
Thrust vectoring 10 °

The J-404 "Panther" Afterburning Turbofan is a jet engine added in version 1.0.5. It has two modes: The first, Dry mode, is similar to that of the J-33 "Wheesley" Basic Jet Engine, with a bit more thrust. The second, Wet mode, uses the afterburner to produce thrust almost equal to the J-X4 "Whiplash" Turbo Ramjet Engine, but at a considerably reduced fuel efficiency. This can make it a good alternative for when you want something that can be controllable and doesn't need excessive heat shielding, but still need to be able to go incredibly fast if necessary, at the expense of increased fuel consumption. It seems to be based on the General Electric F-404 Afterburning Turbofan, which shares the same name and maximum thrust (85 kN dry).


Visualization of the thrust multiplier curves for velocity
Visualization of the thrust multiplier curves for atmospheric pressure

Note that you need to activate the afterburner ("Wet Mode") manually. You can do that by right-clicking the engine and clicking "Toggle Mode." Alternatively, you can assign the afterburner toggle (labelled "switch mode") to an action group if you wish to activate it with a hotkey. This is particularly useful for pairs of engines, since this makes it possible to keep the thrust equal when activating the afterburners. Be aware that heat buildup can gradually become a problem when the afterburners are used in sustained flight.

A well-designed jet with this engine and with the afterburner lit, flown properly, can momentarily climb to 30Km altitude. Or it can supercruise at three times the speed of an equivalent Wheesley jet (with nearly equal fuel efficiency) at 15Km altitude. Which makes this engine ideal for those missions which require doing many science activities above particular altitudes.

It's also worth noting that this engine has the widest thrust vectoring range of all of the jet engines, with a full 10-degree range in all directions. This makes jets built using this engine considerably more maneuverable. For comparison, the second most maneuverable engine is the CR-7 R.A.P.I.E.R. with a thrust vectoring range of only 3 degrees. Under some circumstances, you may want to reduce the engine gimbal range or disable it altogether, particularly when flying at high speeds (e.g. 600+ m/s) and low altitudes (e.g. below 5,000 m), since the engine's extreme maneuverability may allow the aircraft to perform turns sharply enough to break up in flight.

Product description

A high performance jet engine with a variable geometry thrust vectoring nozzle and an afterburner for extra thrust.


  • Initial release