Help...

I remember there is a formula out there to help calculate how far the CG moves based on how you move a weighted object in the airframe....

ie: you move a battery that weighs 4 oz, 3 inches rearward, what is the new CG.....


I remember seeing a formula to calculate this all out....
it is NOT the standard "Calculate the CG" formula that is all over the place, this one actually dealt with moving objects in the airframe
Anyone know where I can find this?

Thanks
Exeter

I think this will work


CG shift = (weight of object moved) * (distance moved) / (total weight)

In your example assuming a 3 lb airplane

4oz * 3in / 48oz = .25in

Exeter,

I'm in a similar process designing floats for an older
trainer..and locating the CG and the balancing act thing.

I ran across this site: http://www.rrcc.org/downloads.htm

Down the page is a program by Mike Sayer,
called Model Aircraft Weight and Balance

And then I found this one which has helped me
the most, because it is simple: http://www.seniorpattern.com/pdf/BalancingAct.pdf

Hope this helps you.
Good luck, fly high be safe, later, bud

thanks gents... appreciate it!