Hi Guy's, I know this topic has come up before with fliers having their prefered methods of getting the C of G right. I have always balanced high wing planes the right way up and low wing planes inverted and never had an issue with incorrect setup.

I have just finished my Cmpro Christen Eagle and was wondering how best to balance it as I have no idea. The factory measurement is 150mm back on the top wing. I know they are balanced using the top wing but are Bipe's balanced right way up or inverted??

It seems strange as I set it up on the balancer right way up and it just sat there, push the tail down and it returns to level, push down on the nose and it returns to level again. BUT to make it a little more nose heavy it requires heaps of lead for very little nose dropping. Maybe it is spot on, I just have not ever had a plane that did not need any balast, maybe I'm just suspicious.

Thanks guy's and as usual any input would be most appreciated.

Regards,
Rod.

Rod,
A bipe is balance on the top wing right side up. If you balance it upside down, there is too much weight over the top that would make it unstable. The reason the convention has you balancing high wings up and low wings down is because the fuse weight needs to be below the wing in both cases. I guess it doesn't matter when balancing mid-wings.

Thanks for that Garcay, much appreciated.

Rod

What is the best way to balance a mid-wing btw ? I always checked them inverted. But if there is a better way............?

Whichever way is more stable on the balancer. Most mid-wings are more stable with the gear on the bottom (right-side-up).

Jim