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An equilibrium glide, achieving a constant airspeed and glide angle, is harder to obtain as animal size increases. Larger animals need to glide from much higher heights and longer distances to make it energetically beneficial. [9] Gliding is also very suitable for predator avoidance, allowing for controlled targeted landings to safer areas.
[8] [9] The curved profile of the "wing" is comparable to the aerodynamic shape of a bird wing. [10] The fish is able to increase its time in the air by flying straight into or at an angle to the direction of updrafts created by a combination of air and ocean currents. [8] [9] Snakes of the genus Chrysopelea are also known by the common name ...
The illustrated encyclopedia of helicopters. New York: Bonanza Books. ISBN 0-517-43935-2. Best, Martin S. (September 2014). "A History of the Fairchild Hiller FH-1100 Helicopter: Part 2: Development and Operation of the FH-1100". Air-Britain Archive. pp. 107– 122. ISSN 0262-4923. Donald, David (1998). The complete encyclopedia of world ...
It is a common emergency procedure taught to helicopter pilots as part of their training. In normal powered helicopter flight, air is drawn into the main rotor system from above and forced downward, but during autorotation, air moves into the rotor system from below as the helicopter descends.
Sperm is produced at the 9th segment, and is transferred to the secondary genitalia prior to mating. The male holds the female behind the head using a pair of claspers on the terminal segment. In females, the genital opening is on the underside of the eighth segment, and is covered by a simple flap (vulvar lamina) or an ovipositor , depending ...
A Washington, D.C. man has been arrested for threatening flight attendants on a United Airlines plane traveling from Houston to New Jersey. Kedus Yacob Damtew, 38, was charged with one count of ...
In late 1971, the Army Air Mobility Research and Development Laboratory, which later became a part of the Army Research Laboratory, awarded Sikorsky a contract for the development of the first prototype. [citation needed] The S-69 was the demonstrator for the Advancing Blade Concept (ABC). [1]
A stowaway who made it all the way from New York to Paris on a flight is expected to be brought back to the U.S. Wednesday afternoon escorted by French security officials.