RE: Hangar-9 Sopwith Camel Build Thread
After following this discussion on CG, I can't help but get the feeling you guys are getting all wrapped around the axle.
25% MAC on the Camel is 3.5" back from the LE of the top wing. Tape a line level (those little plastic green bubble levels you can get from Home Depot) to the bottom of the LOWER wing and suspend the bird with your finger tips. It will give you an accurate balance this way. (The lower wing is closer to reference CL than the upper.)
After flying at 25% for a long time, I felt the bird was too hard to slow down, tended to nose over a lot on landings and was squirrely on takeoff. I moved the CG back to 4" per the book, and she flies great. Trick is not to get too slow, as she will drop the tail on you and get all goofy. Moving the CG back should be done in steps to stay out of trouble.
Mine balanced at this point with two 6S 3000 packs in the cowl, and a Turnigy G60 motor. Aluminum prop nut. Brass prop nut is the difference between 4" and 3.5"
Fly on!!