Provides protection from ice accumulation on half of the wing span until needed for landing. Simulates high performance jet aircraft for economic pilot training. Can be used as test vehicle for full scale aerodynamic testing of new wing geometries on the extension sections. Drag reduction improves speed and efficiency. Glide distance is increased and best glide speed is lowered.
Touchdown speed is lowered.
Takeoff and landing speeds are reduced. Landing impact energy is greatly reduced. Extra aileron area improves handling and control at low speed.