finding G.C on glow plane
 

Hi! question for some one. My Dad and I were arguing about finding the G.C of a plane and the plane is glow and I say you find the G.C with the gas tank filled and he says empty who's right? any reply would be grateful thank you fellow r/cer's

RE: finding G.C on glow plane
 

Empty.

RE: finding G.C on glow plane
 

steelerscotty,

Score another one for us older guys. You always check the CG with the fuel tank empty.

RE: finding G.C on glow plane
 

You father is correct, unless your plane is a canard configuration.

The reason is that during flight the CG moves toward the tail as the fuel is used.
There is a limit for that aft position of the CG, beyong which the plane becomes very unstable.
Then, we measure the location of the CG for the worst condition (empty tank), when the CG is all the way back, but not beyond that limit.

This applies for glow, gas or any liquid fuel powered model.

Check this article out:

http://www.rcuniverse.com/magazine/a...article_id=601

Regards

RE: finding G.C on glow plane
 

empty