>There is a tendency for R/E models to pitch up when a turn is >initiated due to gyroscopic precession.
Yes. But this precession effect is very very weak. In my simulation of a BD being given a fast 30 degree rudder input, the nose pitches up by only 0.03 degrees. Nevertheless, in this ruddering maneuver of a r/e glider, there is indeed a sudden large AoA increase of about 3 degrees (more than enough to cause a "rudder stall"). But the cause is simply due to the linear inertia of the glider, not to precession. Imagine this sequence during a rudder turn, with the rotation angles exaggerated to show the effect: 1) Glider is flying level in a straight line. 2) Glider yaws to the right 45 degrees (while still moving along the straight line) 3) Glider rolls to the right 45 degrees along its now-yawed fuselage axis (while still moving along the straight line) You will see that the glider's belly now faces the oncoming wind along the original direction of motion, which constitutes an Angle of Attack increase. In reality, the glider's yaw, roll, and turn motions will all blend together with some lags between them, but the effect to cause the AoA increase will still be there. RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
