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Rigging the flaps

bob888

Well Known Member
Is there any practical reason to consider the reflex (-3 deg) position as such rather than simply 0 degrees and go from there. It seems that programming the VP-X would be simpler if assuming flap deflection is 0 - 33 deg rather than -3 to +30 degrees. Am I missing something here?
 
It shouldn't matter one way or the other. I have the VP-200 and the Ray Allen sensor I used just provides a number from 0 to something like 255--the VP nor the sensor actually knows what deg the flap is at for a given reading. You tell it what number correlates to a given stop. In my own system, 0 (full up, reflex)correlates to -3 deg on the flap, and I have 3 stops after that: zero deg, half, and full.
 
Exactly what I did on my Skyview/Ray Allen sensor/FPS+ system.

4 Positions UP - 0, trail - 3, T/O - 18, Full - 33.

The whole thing with "Reflex" seems to unnecessarily complicate the everything. I understand that the "trail" position is not the same as fully up but nobody flies around at that setting in the cruise. The only thing I have done is to set my GA position to "3" rather than "Up" (or 0 rather than -3, if you prefer......;))
 
For those of us who fly flapped gliders, having negative flap positions is normal. Since the designer of the RV-10 and -14 airfoil, Steve Smith and Van are both long time glider pilots, they use the negative nomenclature.
 
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