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In flight dynamics, a spin is a special category of stall resulting in autorotation (uncommanded roll) about the aircraft's longitudinal axis and a shallow, rotating, downward path approximately centred on a vertical axis. Spins can be entered intentionally or unintentionally, from any flight attitude if the aircraft has sufficient yaw while at the stall…
History, Aircraft design & Unrecoverable spins
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spin aircraft recovery stall spins airplane wing pilot rudder angle flight attack may recover spinning centre yaw airplanes stalled must
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| a spin-recovery parachute specially installed in the tail of the airplane | instance of | any spin may prove unrecoverable except by using some special spin-recovery device | 0.80 | text |
| a tail parachute | instance of | and the test aircraft must be equipped with some spin-recovery device | 0.80 | text |
| jettisonable ballast | instance of | and the test aircraft must be equipped with some spin-recovery device | 0.80 | text |
| or some method of rapidly moving the centre of gravity forward.Agricultural airplanes are typically certificated in the normal category at a moderate weight | instance of | and the test aircraft must be equipped with some spin-recovery device | 0.80 | text |
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