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Old 05-21-2014, 10:36 AM
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When all else reasonable fails, move the wing to the rear!
(I ended up doing that on an Alpha 40 electric powered trainer!)
That's far better than adding gobs of weight.
Remember that the approximate correct CG is located at about 25%-30% of the distance
from the leading edge to the trailing edge on a straight wing A/C.
You also have to consider the empty vs. full fuel tank effects.
Empty obviously applies to landing, and full to takeoff.
Trying to land or takeoff with a tail heavy condition was one of the big causes
of full size A/C fatal accidents for quite some time.