Bill: I have used washout on several wings but only if the plane had a tendancy to tip stall. I put a bit of washout in with the heat gun and go fly. If it still tip stalls, I put in a bit more until I have a plane that is enjoyable to fly. The idea is to use only an amount of washout to cure the problem. There is such a thing as aerodynamical washout where a different airfoil is used near the tips (typically a similar airfoil to the root but with somewhat less camber). The ideal is where the stall pattern on the wing starts at the root and progresses rapidly to the tip. Any additional washout is causing excess drag. I use Compufoil to create a rib set. I set the root airfoil to "Ideal angle of attack" defined in Compufoil which is typically 0 to +1.5 degrees. Then I work with the washout as above. All in all it is not very difficult and the planes usually fly with the help of God's thermals. :-) Lynford Reno Flightline RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
