Jolly good thread, here's a couple more.....

3. There is no skyhook that you can hook a plane onto tokeep it in the air..

4. A plane flying straight and level, but do so with a "tail down" attitude is tail heavy...

5. Square, flat wing tips (such is found on most aerobatic planes ) are more aerodynamically efficent than ronded ones (such as on a Piper cub)..... or vice versa...

6. Flat tail feathers (i.e. sheet balsa) is not as good as a tailplane with a shaped (ribbed) profile....

7. Barn door ailerons are more efficient than strip ailerons....

8. Large elevators with little movement is better than small (thin) elevators with large movement...

That ought to throw a cat amongst the pigeons...

Cheers

Bundu</p>