What are the types of propellers used in general aviation?
There are three basic types of an aircraft propeller, each with its own variations – the fixed pitch propeller, constant speed propeller or the ground adjustable propeller. Fixed Pitch Propeller. These propellers are made with the angle (pitch) built into the propeller, it cannot be changed.
What is aircraft propeller clearance?
There must be a clearance of at least seven inches (for each airplane with nose wheel landing gear) or nine inches (for each airplane with tail wheel landing gear) between each propeller and the ground with the landing gear statically deflected and in the level takeoff, or taxiing attitude, whichever is most critical.
What oil comes through the center passage of the propeller shaft?
Propeller governor oil, taken from the engine oil supply and boosted in pressure by the engine-driven propeller governor, is directed against the inboard side of the propeller piston. It acts as the counterforce, which can move the blades toward higher pitch.
What is airplane propeller?
Description. An aircraft propeller is an aerodynamic device which converts rotational energy into propulsive force creating thrust which is approximately perpendicular to its plane of rotation. The rotational energy can be produced by a piston or gas turbine engine or, in limited applications, by an electric motor.
What are propeller blades called?
Also called a rotor blade. ii. A rotating airfoil driven by an aircraft engine to produce a thrust force approximately in line with the longitudinal axis of the aircraft. Also called a propeller blade.
How do I get a propeller clearance?
Procedures to measure Propeller Drop :- The poker gauge is placed between the last and second last stern tube seals (aft- near the propeller). The reading is taken every dry dock and recorded. A hole is provided on top of the seal which is closed by a plug.
Why do propellers have counterweights?
Variable pitch propellers have either counterweights or a lock to limit unwanted blade angle movement to low pitch after failures. Counterweights are attached to the blade at a position that will cause the centrifugal loads on the counterweights to drive the blades towards higher pitch (towards feather).
What causes mechanical vibration in a propeller?
Vibration originating from the propeller is usually caused by a mass imbalance. A mass imbalance is when the center of gravity of the propeller is not in the same location as the center of rotation of the propeller.
What type of propeller is used in light sport aircraft?
Light sport aircraft (LSA) use multiblade fixed-pitch composite propellers on up to medium size turbo prop aircraft with reversing propeller systems. Larger transport and cargo turbo prop aircraft use propeller systems with dual or double-acting governors and differential oil pressure to change pitch.
Do any planes still use fixed pitch propellers?
An increasing number of light aircraft are designed for operation with governor-regulated, constant-speed propellers. Significant segments of general aviation aircraft are still operated with fixed-pitch propellers.
Who is propeller service of Miami?
Just after the end of World War II, Propeller Service of Miami Inc. (which was later acquired by Aviation Propellers Inc.) overhauled many military and transport type aircraft acquired a vast quantity of surplus parts. Some of these parts are available for sale today!
What is a propeller governor?
A propeller governor is used to sense propeller and engine speed and normally provides oil to the propeller for low pitch position. [Figure 1] There are a couple of nonfeathering propellers that operate opposite to this. Figure 1. Parts of a governor