>The Allegro Lite is another case in point. >It is designed for Monokote on the center panel >for torsional stiffness.
This design choice was made before I had any real torsional stiffness numbers. After I built the center panel I measured the torsional stiffness before and after covering with transparent Monokote. The D-tube was about 5x stiffer per weight than the covering. The conclusion is that on any D-tube wing, the clearly most efficient choice is to use the lightest covering, and put the weight saved into denser D-tube balsa. More bang for the buck ... er ... gram. - Mark RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
