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 Date: 2010-05-21 12:20:15Helicopter Tail rotor Autorotation Hard landing Bell XV-15 Cougar Helicopters Flight 91 Aircraft Aviation Aerospace engineering |
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| First Page | Document Content | |
|---|---|---|
Date: 2010-05-21 12:20:15Helicopter Tail rotor Autorotation Hard landing Bell XV-15 Cougar Helicopters Flight 91 Aircraft Aviation Aerospace engineering |
Add to Reading List |
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