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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 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 then triggered to coarse once in cruise, the propeller remaining coarse for the remainder of the flight.
Reversible propellers are those where the pitch can be set to negative values. This creates reverse thrust for braking or going backwards without the need to change the direction of shaft revolution. While some aircraft have ground-adjustable propellers, these are not considered variable-pitch.
In adjustable-pitch propeller control system, the pilot has to adjust the propeller pitch angle and thus angle of attack of the propeller blades (typically with a lever) to achieve the desired propeller rotational speed. The increased pitch (blade angle of attack) increases the load on the engine and therefore slows it down, and vice versa.
Ivoprop produce both in-flight adjustable and ground-adjustable propellers of unusual design. Whereas conventional variable-pitch propellers rotate at the blade root, the Ivoprop design has its blade fixed. The blade is hollow, containing a steel torsion rod fixed to the blade tip.
[7] [8] During World War II, McCauley manufactured 20,000 ground-adjustable solid-steel propellers. [1] In 1946, the company invented the forged aluminum propeller. [7] [8] In 1947, McCauley developed the first all-metal propeller for light aircraft (such as single-engine Cessnas and Piper Cubs) — a fixed-pitch prop using the trade name "MET ...
Originally the A-22 came fitted with a 40-litre inboard fuel tank behind the seats, although later models have wing tanks holding 37.5 litres per side. The propeller is a 3-blade composite ground adjustable KievProp. Dual controls are standard, using a single central "Y" yoke or optionally twin yoke control system.
Ground-adjustable Arplast modular propeller on ARV Super2 Modular propellers may be fitted to aircraft as well as boats. [ 1 ] The benefits of a modular propeller are that its specifications (such as blade pitch or propeller diameter) may be altered to suit varying conditions; and it becomes much easier to replace damaged elements, such as a ...
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related to: ground adjustable propeller definition aviation