This Information Sheet covers current gear design practices as they are applied to airvehicles and spacecraft.
The material included goes beyond the design of gear meshes and presents the broad spectrum of factors
which combine to produce a working gear system, whether it be a power transmission or special purpose
mechanism. Although a variety of gear types, such as wormgears, face gears and various proprietary tooth
forms are used in aerospace applications, this document covers only spur, helical, and bevel gears.
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