Variable-Pitch Propeller: A propeller the angle of whose blades may be varied while it is in rotation.
Vee Engine: An aero-engine with two banks of cylinders arranged in the form of a "V," either upright or inverted.
VARIABLE-PITCH PROPELLER - Usually a propeller in which the blades can be set to two positions a fine-pitch setting for take-off and landing, and a coarse-pitch setting for economic cruise performance.
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Constant-speed propeller A variable-pitch propeller with a governor. The governor controls the angle of the propeller blades to maintain a constant RPM.
There are two types of variable-pitch propellers adjustable and controllable. The adjustable propeller's pitch can be changed only by a mechanic to serve a particular purpose-speed or power.
was insulated, to reduce engine noise levels inside the plane, and it featured such amenities as upholstered seats and a hot water heater to make flying more comfortable to passengers. Eventually, Boeing also gave the 247 variable-pitch propellers, ...
 See also: Aviation, Direct, Speed, Plane, Pitch
  
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