Take a look at a DeHaviland Twin Otter (DHC-6) with full flaps selected. You will see that the trailing section has rotated approx 80 degrees from the "up" position. This plane has full span double sloted Fowler flaps. The aileron sections also function as flaperons. Tremendous short field capabilities (STOL). Take-offs in less than the length of the plane, I've seen it done. Not bad for full scale.