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Blade pitch acts much like the gearing of the final drive of a car. Low pitch yields good low speed acceleration (and climb rate in an aircraft) while high pitch optimizes high speed performance and fuel economy. It is quite common for an aircraft to be designed with a variable-pitch propeller, to give maximum thrust over a larger speed range ...
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 French government had tested the device in a ten-hour run and that it could ...
The requirement for pitch variation is shown by the propeller performance during the Schneider Trophy competition in 1931. The Fairey Aviation Company fixed-pitch propeller used was partially stalled on take-off and up to 160 mph (260 km/h) on its way up to a top speed of 407.5 mph (655.8 km/h). [36]
The Grob G 115 is a general aviation fixed-wing aircraft, primarily used for flight training.It is built in Germany by Grob Aircraft (Grob Aerospace before January 2009). The E variant with a 3-blade variable pitch propeller is in service with the Finnish Air Force, [1] the Royal Navy and Army Air Corps for Flying Grading (a pre-EFT flying course) and in the Royal Air Force as part of No. 6 ...
Ground-adjustable propellers, which are mostly used on light and very light aircraft, are much cheaper and lighter than more sophisticated and versatile in-flight-adjustable propellers. A ground-adjustable propeller allows pitch changes to be made, although not in flight, to optimise the aircraft for current payload and flying conditions. [2]
Data from Jane's All the World's Aircraft 1958-59 General characteristics Crew: 2 Capacity: 3 Length: 10.8 m (35 ft 5 in) Wingspan: 13.53 m (44 ft 5 in) Height: 3.83 m (12 ft 7 in) Wing area: 25.1 m 2 (270 sq ft) Aspect ratio: 7.4 Airfoil: NACA 230 series Empty weight: 2,110 kg (4,652 lb) Gross weight: 2,994 kg (6,601 lb) Fuel capacity: 730 L (193 US gal; 161 imp gal) in two hull tanks ...
Lightly loaded propellers for light aircraft and human-powered boats mostly have two blades, motor boats mostly have three blades. The blades are attached to a boss (hub), and while it can be a big boss, it should be as small as the needs of strength allow – with fixed-pitch propellers the blades and boss are usually a single casting.
Propeller blade angle of attack (left) and propeller blade angle of attack change with aircraft pitch change, demonstrating asymmetrical load (right) P‑factor , also known as asymmetric blade effect and asymmetric disc effect, is an aerodynamic phenomenon experienced by a moving propeller , [ 1 ] wherein the propeller's center of thrust moves ...
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