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Old 06-10-2007 | 07:13 PM
  #19  
jrf
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Default RE: Where to add Stall strip

One more point you might want to consider if you plan on doing any aerobatics:

Stall strips are the only solution that will work the same upside down. Washout, raised barn door ailerons and leading edge droops will all make the airplane more likely to tip stall when it is inverted.

About now you are probably wondering why most of the Caps, Extras, Edges, Yaks, pattern planes, and sport planes with tapered wings don't have this problem. The answer is careful selection of root and tip airfoils (They are not the same.) to calibrate the stall characteristics at the root and the tip. A good sport aerobat will have the tip stall first, but gently, and the root later but more abruptly. The result is a wing that will stall flat if the stall is approached slowly and will snap roll either way if the pull up is more radical. The pilot can then control the stall characteristics by the speed and magnitude of his elevator inputs, and control the direction of the snap with the rudder.

The CMP Chipmunk, unfortunately, seems to have been designed by someone who doesn't understand that.

Jim