flight

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flight

(flīt)
1. The motion of an object through air.
2. Escape.
[O.E. flyht]

flight

any locomotion through air, either active or passive (gliding). Active flight is brought about by the movement of wings by muscles as in bats, birds and insects; gliding involves a minimum of muscular effort and is found only in some larger birds and certain mammals adapted for flight, such as the flying lemur or flying fox. In birds, muscles are attached directly to the wings and are of two main types: depressor muscles which produce the downstroke and run from the humerus to the STERNUM, and elevator muscles which produce the upstroke and are attached to the upper surface of the HUMERUS by a tendon which runs through the pectoral girdle to the sternum. In insects such as bees, wasps, flies, beetles and bugs, the muscles raising and lowering the wing are attached to the walls of the thorax (indirect flight muscles) and not to the wings and are called asynchronous fibrillar muscles. Direct flight muscles attached to the wings alter the angle and adjust the wings to the resting position. In other insects, for example, the dragonflies, the flight muscles are called synchronous muscles, being attached directly to the wings. Asynchronous wing beats are much slower than synchronous ones.
References in periodicals archive ?
Michael, 16, studied topics including the principles of flight, satellite communications, pilot navigation, airframes and other engineering and aviation related topics.
These precise, systematic experiments resulted in the true mathematical principles of flight and provided the foundation of aeronautical engineering.
And to mark the 100th anniversary of the first manned flight, Professor Egghead and his assistant Birdbrain will guide you through the principles of flight.
During qualification exercises aboard Essex (CV 9), an F9F-2 Panther defied all of the accepted principles of flight and performed a feat that would win a bet from any aircraft designer.
Organised and written as an accessible study guide for student pilots wishing to take commercial ground examinations to obtain ATPL or CPL licenses, Principles of Flight for Pilots also provides a reliable up-to-date reference for qualified and experienced personnel wishing to further improve their understanding of the Principles of Flight and related subjects.
He brought along a scale model of the Angel of the North to explain the principles of flight and to explore whether the Antony Gormley sculpture could actually fly.

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