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In 1919 L. E. Baynes patented the first automatic variable-pitch airscrew. Wallace Rupert Turnbull of Saint John, New Brunswick, Canada is credited in Canada for creating the first variable pitch propeller in 1918. [5] The French aircraft firm Levasseur displayed a variable-pitch propeller at the 1921 Paris Air Show. The firm claimed that the ...
In marine propulsion, a variable-pitch propeller is a type of propeller with blades that can be rotated around their long axis to change the blade pitch. Reversible propellers—those where the pitch can be set to negative values—can also create reverse thrust for braking or going backwards without the need to change the direction of shaft revolution.
Early pitch control settings were pilot operated, either with a small number of preset positions or continuously variable. [1] The simplest mechanism is the ground-adjustable propeller, which may be adjusted on the ground, but is effectively a fixed-pitch prop once airborne. The spring-loaded "two-speed" VP prop is set to fine for takeoff, and ...
Variable-pitch propeller (aeronautics) Topics referred to by the same term This disambiguation page lists articles associated with the title Variable-pitch propeller .
A ground-adjustable propeller is a simple type of aircraft variable-pitch propeller where the blade angle can be adjusted between pre-set limits of fine and coarse pitch. [1] As its name implies, a ground-adjustable propeller may be adjusted only when the aircraft is on the ground and when the engine is not running.
The propulsion system incorporated the world's largest air propeller, spanning 21-foot, at the time of its introduction; manufactured by Hawker Siddeley Dynamics, this four-bladed variable-pitch propeller was composed of an aluminium-fibreglass composite. Studies on the topic of adopt even larger propellers was also conducted by the firm. [12]
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