Biplane CG Calculations??????
 

I am currently building a 1/6th scale Fokker D VII and am in need of a way to calculate the CG. The wings are of constant but different chords and of different lengths. Any suggestions on how to do this :confused: ????

Re: Biplane CG Calculations??????
 

If it's a true 1/6th scale with scale outlines, you can balance it about 4" back from the leading edge of the top wing. Or, with most biplanes, directly up from the leading edge of the bottom wing is usually a good place to start.

Mine is 4" back from the leading edge of the top wing (which is also directly above the leading edge of the bottom wing). Flies very well with that CG.

Daren

interesting information
 

Here is some interesting info on CG calculation

http://www.pcisys.net/~mrmike/mac.htm

Rod

Biplane CG Calculations??????
 

go 25 % back from the leading edge of top wing and the same for the bottomwing.....put your balance spot in the middle of that and you will be in the neighbor hood...then fine tune it[cg] as you fly[you know if ya run out of elevator on landing move the cg back,etc,etc]...but,if ya have plans ,you will always go off of the recommended cg. this method has always worked for me on those swap meet bipes we all pick up from time to time

Biplane CG Calculations??????
 

What the axeman says.. Works in the side view or the top view!
And on one of my sites:
http://home.earthlink.net/~pjburke1/cg.htm