Right here’s a uncommon take a look at “magic” of the F-15 Eagle’s shifting air intakes.
The video on this put up is kind of exceptional: shot throughout a current rehearsals of the Gifu Air Base Air Competition (that may happen subsequent weekend), it reveals an F-15J of Flight Improvement and Experiment Wing of the JASDF (Japan Air Self-Protection Pressure), based mostly at Gifu, throughout a sequence of pitch-up/pitch-down maneuvers whose objective is to indicate the impact of the elevators.
The F-15’s air intakes are engineered in such a method the ramps can transfer up and down, in order to alter their angle throughout flight and provides the optimum air movement for the engines beneath the present mixture of airspeed, altitude, and throttle setting. The air intakes additionally embrace a diffuser ramp and a bypass door that transfer not solely to feed the compressor with the correct amount of air, but additionally to decelerate the airflow and make it subsonic earlier than it reaches the engine, thus stopping shock/stress waves on the compressor and keep away from stalls.
Variable geometry air consumption of F-15 pic.twitter.com/KvQBwmrAYh
— Harvey Blanquisco (@ChonkyBoi562) November 5, 2023
Whereas you will discover different movies of the air consumption ramp pivoting up and down, you not often get an opportunity to obviously watch it shifting so quick.
By the best way, you may watch one of many F-15J’s follow shows right here.