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Airmaster Propellers - New Zealand; The Airscrew Company - UK; AKS Inc - United States; Alisport, Italy (Idrovario Propellers) American Propeller Manufacturing Company - United States; Arplast Helice - France; Aymar-DeMuth Propellers - United States; Aurusropellers - Aurus Design S.r.l.s. - Italy; Avia Propeller - Czech Republic; Aviation ...
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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.
Heath developed and first mass-produced airplane propellers at APMC. In 1922 he founded Paragon Engineers inc, and demonstrated the first engine-powered and controlled, variable and reversible pitch propeller. AMPC was initially founded in Washington D.C to build low-production experimental and custom propellers under the name Paragon. [4]
The two companies were merged in 1929 by the United Aircraft and Transport Corporation. [ 1 ] In the early 1930s, Frank W. Caldwell of Hamilton Standard led a team that developed a variable-pitch propeller, using hydraulic pressure and centrifugal force to change the angle of attack of the blades.
McCauley Propeller Systems is an American aircraft propeller manufacturer, founded in Dayton, Ohio in 1938 by Ernest G. McCauley. [1] At its peak, it was reportedly the world's largest aircraft propeller manufacturer, [2] or at least the largest manufacturer of general aviation propellers.