The zero lift angle should still be negative, and decalage is measured by the profiles respective zero lift angle, not their bottoms! For most stabilisator airfoils they are the same, as flat plate is very common, but flat plate wings are rare! And even the angle from LE to TE isn't the zero lift angle, unless the airfoil is symmetrical. I doubt you have the tips at a negative decalage, but you might. Under high loads many wings twist and asume a more or less zero-lift angle on the outer panels, thus reducing maximum lift, thus prevents wing breakage under load! Test by fly fast on a slope so you can stand behind the aircraft and at the same level. IF the wingtips do bend downward you do have a problem, if not, let it be for the time being! Could always be adjusted by reheating the covering! Tord, Sweden -- If reply difficulties - use [EMAIL PROTECTED] Tord S. Eriksson, Ovralidsg.25:5, S-422 47 Hisings Backa, Sweden RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
