rabidrue1
May 17, 2007, 07:01 AM
I have for years used the folowing method to test C/G proof models. Mostly i build a profile balsa sheet glider 1/4 to1/3 size. I ues a spring binder clip for adjustable balist. Often i test them inside of our repair shop,if ican get the cars and harleys out of the way ihave 90 x50 ft. open space. To launch them i use a rubberband slingshot board. Board is 36" x5" with 12" of sig 1/8" contest rubber tacked at one end. Ihave found this method takes alot less time to pin down C/G location because by pulling the model back to the same mark every time all launchs are the same. Sofar this method allowed me to find accurate C/G for some realy strange looking and oddly configured planes that when built to full size at least the C/G was ok.We wont talk about my dumb thumbs or some of the odd flight habits some of them had. But what the hell at least the first time ther was daylight under the wheels the C/G was right its a start.