Xin mời Quý vị xem chiếc phi cơ tối tân nhất của Không lực Hoa Kỳ F.22 Raptor , biểu diển ( demonstration ).
The following link will give you the option to download ( ENJOY ) a 5 minute video of the F-22 demonstration at the Langley Air Show. It is really impressive.
Xin CLICK vào LINK dưới đây:
The aircraft's design provided for subsonic and super-sonic air flows, without stagnation or compressor stalls. Supersonic in itself was a big challenge because they had to use shock waves to slow the intake air mass to sub-sonic before it hit the compressor blades, or they would stall. The designers' 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 but that snap maneuver doesn't hold a candle to what this two-dimensional vectored-thrust fighter with fat independent horizontal stabilizers can do at low speed. If this is what the aircraft can show in public demonstrations, I can only guess what tricks it has up its sleeve in the high subsonic dogfight speed range. --
God Bless America!!!