1. Lift-based wind turbines typically have lifting surfaces moving perpendicular to the flow. 2. The larger lifting surface reduces wing loading, hence further reducing the stalling speed. 3. In a typical canard aircraft both fore and aft planes are lifting surfaces . 4. Compound rotorcraft may also include additional thrust engines or propellers and static lifting surfaces . 5. Digital DATCOM cannot analyze three lifting surfaces at once, such as a canard-wing-horizontal tail configuration. 6. Zimmerman's research also posited aircraft having flat circular bodies, sans wings, as their lifting surface . 7. This problem can be addressed by superposition of lifting surfaces through the experimental input option. 8. One or more lifting surfaces can be attached to a fuselage by means of features called " anchors ". 9. Because wakes are shed from lifting surfaces , their potential is only associated to constant doublet panels of known intensity. 10. A hybrid tethered craft comprising both a lighter-than-air balloon as well as a kite lifting surface is called a kytoon.