| 21. | When the angle of attack on the wing of an aircraft reaches the stalling angle the aircraft is at risk of autorotation.
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| 22. | At level flight, it could enter a 1.4g bank turn with the rotor in autorotation, increasing rotor rpm.
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| 23. | Since the tail rotor is driven by the main rotor transmission during autorotation, heading control is maintained as in normal flight.
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| 24. | Pescara is credited for being one of the first people to successfully utilize autorotation for the safe landing of a damaged helicopter.
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| 25. | Several factors affect the rate of descent in autorotation : density altitude, gross weight, rotor rotational speed, and forward airspeed.
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| 26. | But Iraqi troops suffered only 25 percent autorotation during that 40-day bombing mission, according to Air Force reports following the conflict.
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| 27. | During vertical autorotation, the rotor disc is divided into three regions the driven region, the driving region, and the stall region.
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| 28. | Because the main rotor has very little mass and inertia, autorotation in an R22 requires careful and proper execution to assure a successful outcome.
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| 29. | In the event of engine failure and the resulting autorotation, the pilot may not have enough cyclic control to flare properly for the landing.
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| 30. | :: : : : Autorotation is something extensively practiced by helicopter pilots, but would work best if the tail rotor failure is gradual.
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