ORIGINAL: tashley
That was exactly my question earlier. The pointer will show the models cg but it will not show TRUE cg unless the model's datum line is level. Nose up, forward cg. Nose down, rearward cg.
What I actually said was:
ORIGINAL: krossk
Not quite - the plumb-bob will always point through the center of gravity, regardless of the plane's orientation. That is why it doesn't really matter how you suspend the model.
The true CG will not be located on surface of the model, but rather somewhere between the top and bottom surfaces. If you want to locate the
projection of the CG on the top surface, then the datum line must be horizontal (perpendicular to the plumb line).