Hi It seems to me that the ONLY sensible place to measure from is the wing leading edge.
Given that the wing chord is 48 inches and wings are pretty standard, the centre of lift will be at a known point relative to the leading edge. You can make the plane longer or shorter, and that may alter the CG but it won't alter the centre of lift, so you should always refer back to the leading edge. It's a bit different once a plane is in service, you can choose to measure the CG from where ever you like, as long as you know were the CG should be relative to your datum, but for first flight you must refer the CG back to the wing. Pete > > I received an e-mail that suggested my last post on determining c.g. > might have been a bit confusing when I said "referencing back to the > lead edge of the wing". >
