You can see how thick the wing section is in this picture. The shape of the wing was chosen so it produces lift whether it is upright or upside down (inverted). It also makes it very strong
Here are the wings inside the plant. Note the long span of the ailerons. That gives a high roll rate.
Here are the elevators
And the rudder
And another shot of the wings with Mark Jeffries for size comparison.
William J. Halverson<email@example.com>