I Need to Find the C/G of a Pizza Box.

[Boss248]

I have a pizza box style plane that is 23.5" long by 22.5" wide. Can someone please tell me where the c/g is on this type of wing configuration???

[Ollie]

If you are talking about a rectangular planform then the aerodynamic center (AC) is 5-7/8 back from the leading edge. The CG should be ahead of the AC by an amount that gives the desired stability. If the model is aerodynamically "dirty" with exposed cylinder head, unfaired landing gear, exposed control horns, exposed linkages, etc. then the CG should be about 15% of the chord (3.5 inches) back from the leading edge. If the plane is aerodynamically clean then the CG should probably be about 20% (4.7") back from the leading edge. Start with a forward CG and move it back gradually between test flights until the desired reduction in stability results.