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For a while I have been wondering why there seem to be no
airplanes with a low wing and a high tail. Say for instance with a fuselage and epenage like the Zodiac 701, but with a low wing instead of the high wing. Then I read about deep stall, as illustrated he http://www.answers.com/topic/deep-stall-png Here deep stall is defined as a condition in which the main wing is stalled and the stabilizer is enveloped in the turbulent wake of the stalled wing so that the pilot has lost pitch control and thus cannot lower the nose to recover. For certain airframe geometries, (such as the illustration above) that condition can occur even if the aircraft is within the proper CG limits. My question regards the orientation that immediately precedes the deep stall. If the angle of attack at stall is exactly the same as the angle that puts the stabilizer in the shadow of the wing, that will precipitate a deep stall, right? What if the wing stalls at a lower AOA? Would the stabilizer then drop into the wake? ISTM that if the AOA that stalls the wing is higher than the AOA that puts the stabilizer in the wake of the wing then that aircraft is immune to this sort of deep stall, so long as it is flying within the CG limits, right? -- FF |
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