What could be the last US manned aircraft project has just had it's STOVL
capability proven this week on its flight tests.
Here are some videos.
BF1_10P03140kntAppraochandLanding_ppt.wmv
F-35BHover_March17_10_ppt.wmv
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I'm not certain all what happened but my understanding is that the afterburner was accidentally applied during takeoff (not properly locked out in software I guess). When this happened the lift became unbalanced as the lift fan could not compensate. The tail rose rapidly moving into a backflip.
About half way through either the pilot or the computer system transfered to normal flight mode while still in full afterburner. The momentum pushed the aircraft 270 degrees from initial level position to pure vertical with the afterburner stopping the aircraft's descent.
Finally the momentum pushed the aircraft back to level flight (a full 360) and the full afterburner rocketed the F-35 off like a bat out of hell, just missing loosing enough altitude to hit the deck (yes the aircraft survived as far as could be seen on video).
I'm sure everyone involved required a change of pants. I wouldn't have believed it if I hadn't seen the video...
http://www.lockheedmartin.com/products/f35/
It'll probably never be used, unmanned vehicles performing all its missions.