F-15 Air intakes.

[ny3d1]

I have a question regarding the F-15 Eagle. I have noticed that the air intakes on some models are not the same. Some face slightly downwards about 10 degree and other models are straight, facing forward. Is there a reason for this??

[draconus]

They are independent for each engine, movable parts depending on the angle of attack, Mach number, etc. to feed the engines with optimum subsonic flow of air. Look at them during engine start to see for yourself.

Edited July 27, 2018 by draconus

[mvsgas]

Short answer: they move.

 

Long answer;

Located on the outboard sides of the aircraft center fuselage, the F-

15C/D has an automatic independent air induction system (fig. 18-2) for

each engine. The air induction system is comprised of first, second, third,

and diffuser ramps; airflow bypass door; three actuators; an air inlet control

(AIC), bleed air exit louvers, and foreign object screens. During engine

operation, the first ramp pivots up and down to vary the inlet opening

according to engine air requirements. The AIC automatically controls ramp

movement and geometric size of the air intake passageway.

 

 

 

https://forums.eagle.ru/showthread.php?t=57574

https://forums.eagle.ru/showthread.php?t=21166

https://forums.eagle.ru/showthread.php?t=187306

https://forums.eagle.ru/showthread.php?t=117260

https://forums.eagle.ru/showthread.php?t=52536

Edited August 9, 2018 by mvsgas

[Banzaiib]

When the F-15 gets tired, they droop a little... working as intended [NOT A BUG].

[Ironhand]

[Mars Exulte]

That F-15 seems incredulous. What did you just say to it?

[Ironhand]

That F-15 seems incredulous. What did you just say to it?

 

:) Don’t look at me. Ask the guy down by its tail...

Edited August 6, 2018 by Ironhand

[Banzaiib]

Can you smell, what the F-15 is cookin?