[Sharkie]

When I took my ground school for my full sized pilots license, they taught the Bernoulli principle. It doesn't take too much to realize that it's not going to produce enough lift to fly a typical airplane. Our Grumman Traveller had a wing loading of 41 pounds per square foot of wing. The model in the video has a wing loading of about 12 OUNCES per square foot of wing. The difference is in the reynolds numbers. In other words, the air molecules don't scale down when you scale down the airplane. Even with a light wing loading like that, Bernoulli style lift only plays a MINOR part in lifting the plane. One other thing that isn't apparent is the fully symmetrical airfoil on the model. If the wing is the same shape top and bottom, how would air travel further over the top as opposed to the bottom? Obviously it couldn't. In normal flight, a positive angle of attack must be maintained in order to produce lift. This is what makes a plane fly.

What makes the model in the video fly when it's not in normal forward flight is raw power. The plane has a power to weight ratio of between 2.5 and 3 to 1. This allows it to "hang on the prop" and do a lot of the other maneuvers that are seen. Huge control surfaces, such as AILERONS allow it to maneuver very quickly at high speed, and allow it to maneuver at all at virtually zero speeds. Without the large surfaces, most of the maneuvers being flown could still be done, but the ones where the plane is moving very slowly would be much more difficult because there wouldn't be much control available.

Jim