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Old 03-10-2018, 07:07 PM
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BobH
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You can establish the CG at 30% MAC. Measure from the front of the top wing to the back of the bottom wing. This is the total dimension you are interested in.
Take 30% or 25% of that from the LE of the top wing and see where that point lies.
That will bet you pretty close to a decent CG.