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Hartzell Propeller is an American manufacturer that was founded in 1917 by Robert N. Hartzell as the Hartzell Walnut Propeller Company. [1] It produces composite and aluminum propellers for certified , homebuilt , and ultralight aircraft.
A constant-speed propeller is a variable-pitch propeller that automatically changes its blade pitch in order to maintain a chosen rotational speed, regardless of the operational conditions of the aircraft. This is achieved by use of a constant-speed unit (CSU) or propeller governor, which automatically changes the propeller's blade pitch.
Robert Norris Hartzell (born June 3, 1896 in Ohio, died December 11, 1968) was an American entrepreneur who started Hartzell Propeller in 1917, a company that produces aircraft propellers. [ 1 ] [ 2 ]
Hartzell Propeller developed their "Q-tip" propeller used on the Piper PA-42 Cheyenne and several other fixed-wing aircraft types by bending the blade tips back at a 90-degree angle to get the same thrust from a reduced diameter propeller disk; the reduced propeller tip speed reduces noise, according to the manufacturer. [48]
Haw Propeller - Germany; Helices E-PROPS - Electravia - France (2008–present) Hélices Halter - France (1987-2014) Hamilton Standard - United States (1929-1999) Hamilton Sundstrand - United States (1999-2012) Hartzell Propeller - United States (1917–present) Hegy Propellers - United States; Heine Propellers - Germany; Helix-Carbon - Germany ...
A governor, or speed limiter or controller, is a device used to measure and regulate the speed of a machine, such as an engine.. A classic example is the centrifugal governor, also known as the Watt or fly-ball governor on a reciprocating steam engine, which uses the effect of inertial force on rotating weights driven by the machine output shaft to regulate its speed by altering the input flow ...
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The major difference is the choice of propeller, with the CS using a Hartzell two-blade aluminum constant speed prop and the XLS using an MT composite three-blade unit. [ 3 ] [ 4 ] Capacity is available for up to 1,000 aircraft a year to be produced with certification by the European Aviation Safety Agency in 2008.