need help with cg on bipe????
07-28-2002 | 11:20 PM
#2
Senior Member
Joined: May 2002
Posts: 387
Likes: 0
Received 0 Likes
on
0 Posts
From: Northern,
OH
need help with cg on bipe????
Not familiar with that model. BUT, biplanes are no mystery really.
Are your wings staggered ? If so , I'd balance at 25% from the leading edge of the OVERALL chord. In other words, say you have a 10 inch chord wing and 2 inches of positive stagger(top wing is 2 inches forward of the bottom), you'd balnce the plane as if it had a 12 inch chord, from the leading edge of the top wing. That would be 3 inches from the leading edge of the top wing. 25% may leave a little nose heavy but it's a good, safe place to start. If your wings have no stagger, then balance 25% from the leading edge of the top wing, as if it were just a high wing plane. This applies only to constant chord wings.
Whew, with all that said, if the wings are swept or tapered that's a hole 'nother animal. Then you need to start figuring out your MAC to find the proper CG. Hope this helps
Are your wings staggered ? If so , I'd balance at 25% from the leading edge of the OVERALL chord. In other words, say you have a 10 inch chord wing and 2 inches of positive stagger(top wing is 2 inches forward of the bottom), you'd balnce the plane as if it had a 12 inch chord, from the leading edge of the top wing. That would be 3 inches from the leading edge of the top wing. 25% may leave a little nose heavy but it's a good, safe place to start. If your wings have no stagger, then balance 25% from the leading edge of the top wing, as if it were just a high wing plane. This applies only to constant chord wings.
Whew, with all that said, if the wings are swept or tapered that's a hole 'nother animal. Then you need to start figuring out your MAC to find the proper CG. Hope this helps
