#1
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לפני 18 שנים
Fast (super-cruise) and stealthy, and integrated avionics are cool, but what
really impressed me was the F-22s low speed stability and maneuverability.
In the late 40s and to early 60s aeronautical engineers were going nuts on
how to shape intakes to handle both subsonic and super-sonic air flows,
without stagnation or compressor stalls. Supersonic in itself was a big
challenge because you had to use shock waves to slow the intake air mass to
sub-sonic before it hit the compressor blades, or they would stall. We
figured it out, but the solution was keeping a lot of air going in the front
end to make sure the all hot air kept going out the back end. As I watch
this Mach 2 airplane suspend motionless in air and do tail slides, I am in
awe of the engines and intakes.
I used to think the Su-27 / Su-31 Cobra maneuver was the epitome of 3rd to
4th generation fighter maneuverability. That snap maneuver doesnt hold a
candle to what this two-dimensional vectored-thrust fighter with fat
independent horizontal stabilators can do at low speed. I am sure there are
far more tricks up its sleeve in the high subsonic dogfight speed range.
This video is about 5 minutes long but the last 30-40 seconds are priceless.
http://www.f22-raptor.com/media/video_gallery/videos/F22_AirShow_Langley.wmv
ACC just approved the Raptors new DEMO profile. This was the first show.
Five minute video.
Watch the elevators of the airplane in this demo. They work independently.
It also has vectored thrust.
ACC = Air Combat Command (for the non-Air Force folks)
really impressed me was the F-22s low speed stability and maneuverability.
In the late 40s and to early 60s aeronautical engineers were going nuts on
how to shape intakes to handle both subsonic and super-sonic air flows,
without stagnation or compressor stalls. Supersonic in itself was a big
challenge because you had to use shock waves to slow the intake air mass to
sub-sonic before it hit the compressor blades, or they would stall. We
figured it out, but the solution was keeping a lot of air going in the front
end to make sure the all hot air kept going out the back end. As I watch
this Mach 2 airplane suspend motionless in air and do tail slides, I am in
awe of the engines and intakes.
I used to think the Su-27 / Su-31 Cobra maneuver was the epitome of 3rd to
4th generation fighter maneuverability. That snap maneuver doesnt hold a
candle to what this two-dimensional vectored-thrust fighter with fat
independent horizontal stabilators can do at low speed. I am sure there are
far more tricks up its sleeve in the high subsonic dogfight speed range.
This video is about 5 minutes long but the last 30-40 seconds are priceless.
http://www.f22-raptor.com/media/video_gallery/videos/F22_AirShow_Langley.wmv
ACC just approved the Raptors new DEMO profile. This was the first show.
Five minute video.
Watch the elevators of the airplane in this demo. They work independently.
It also has vectored thrust.
ACC = Air Combat Command (for the non-Air Force folks)
התייחס למטוס שלך כמו לאהובתך.... היכנס אליו חמש פעמים ביום, העלה אותו לגבהים והחזר אותו חזרה לקרקע!
IAF.Perry
IAF.Perry
