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To borrow your phrase, it strikes me more as a cya thing because it did
get out to the market place. Greg Esres wrote: This is from "Cessna Wings for the World", by William D. Thompson, regarding the C-177: ==================================snip========== ============= The pitch-down motion in flaps-down sideslips was a more serious problem, however. Production test pilots became aware of a more noticeable waviness in some of the leading-edges of the wing, and occasionally, a 2-foot length of paint overspray that caused wing- dropping tendencies at the stall. This had to be corrected by applying body filler material on the leading-edge or rubbing compound to remove the almost invisible overspray. There was also questionable uniformity of the stabilators, giving as much as 15-mph deviations in minimum trim speeds. On some airplanes they reworked or actually replaced the stabilator with some improvement. This led to the decision to incorporate slots into the stabilators' leading edges so that they could tolerate a steeper downflow of air without stalling the under-surface of the stabilator. This solved the problem, and a fleetwide "Cardinal Rule" retrofit was planned at no cost to the customer. In the meantime, a service bulletin called for a temporary installation of a simple sheet metal plate that would limit the maximum flap deflection to 15 degrees. We were paying the price for these thin skins. ==================================snip========== ============= So this was more than just a stabilator stalling; it had more to do with production problems than an inherent design problem. A tail- stalling airplane wouldn't pass certification tests. |
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