Just wondering how you are "supposed" to measure CG. Its funy, I have been building and flying for 13 years, and I never actually found out. My question relates to using a flexible tape that measures from the leading edge following the curvature of the airfoil, vs. my top down method of laying a rigid tape or ruler flat against it and measuring there. Thus far my CG's have always been fine, but my latest model has a VERY short range and a thick foil.

Thanks in advance,
Brett

If so maybe you can measure from the trailing edge forward?

Use the top-down method for best results.

use great planes CG balance machine, it works!!
I always go for strait line, so a ruler is in order.

Well that explains why its always been fine!! I never realized I wasn't sure until I built this particular plane. . . pretty funny I went this long without knowing. . .thanks!!!

Brett


Maiden flight of the ultimate in the morning. . . I am excited!!

The flexible tape wil place the CG SLIGHTLY forward of where you intended. Usually less than 1/8 inch difference.

Since a sligtly forward CG is rarely (practically NEVER) gong to destroy a model... its not a problem.

Remember... Nose-heavy = slugginsh performance. Tail-heavy = broken airplane. Its easier to fix noseheavy's result after landing than tailheavy's result after impact