It's this turbulence which aircraft try to avoid, as abrupt changes in local wind speed or direction ( wind shear ) can expose the wings to high angle of attack, and make it easy to stall the lifting surfaces.
32.
The design had first been announced in " Flight " in 1937 as the Delta F . Certainly the Delta 8 was not a scale model of the proposed airliner, but the arrangement of its lifting surfaces was similar.
33.
The Scaled Composites Triumph was a twin-engine, business jet prototype designed and built for Beechcraft . The aircraft is a three lifting surface design, with both a small forward wing, and a small conventional horizontal stabilizer in a T-tail configuration.
34.
A configuration having three comparable lifting surfaces in tandem is more correctly referred to as a " three surface aircraft ", or sometimes a " tandem triple " or " tandem triplet ", and is not a triplane as such.
35.
"The Federal Aviation Administration ( FAA ) defines a glider as a heavier-than-air aircraft that is supported in flight by the dynamic reaction of the air against its lifting surfaces, and whose free flight does not depend on an engine.
36.
Each set of three wings was obtained by the direct reuse of the lifting surfaces of the triplane bomber Caproni Ca . 4; after the end of the war several aircraft of this type were cannibalized in order to build the Transaereo.
37.
Most origami paper darts tend to be flying within turbulent air in any case, and as such, are important to research into turbulent flow as are low-Re lifting surfaces found in nature such as leaves of trees and plants as well as the wings of insects.
38.
Starting with just the shape of the lifting surface and the general flow conditions ( airspeed, density, and angle of attack ), the existence of lift, the amount of lift, and all of the important details of the lifting flow have been predicted successfully by the theories.
39.
The "'Vought XF5U "'" Flying Flapjack " was an experimental U . S . Navy fighter aircraft designed by Charles H . Zimmerman for Vought during World War II . This unorthodox design consisted of a flat, somewhat disc-shaped body ( hence its name ) serving as the lifting surface.
40.
The classic " Farman " pusher had the propeller " mounted ( just ) behind the main lifting surface " with the engine fixed to the lower wing or between the wings, immediately forward of the propeller in a stub fuselage ( that also contained the pilot ) called a nacelle.
