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A toroidal propeller is a type of propeller that is ring-shaped with each blade forming a closed loop. The propellers are significantly quieter at audible frequency ranges, between 20 Hz and 20 kHz, while generating comparable thrust to traditional propellers. In practice, toroidal propellers reduce noise pollution in both aviation and maritime ...
Roughly bounded by the NJ-NY state line and State Highway 23. between Port Jervis, New York and Wantage Township, New Jersey 41°17′16″N 74°41′40″W / 41.287778°N 74.694444°W / 41.287778; -74.694444 ( High Point State
Hartzell introduced a turboprop propeller in 1961 and, in 1975, certified a 5-bladed propeller for the Short 330. [9] [12] In 1978, the company produced a composite aramid fiber propeller for the CASA 212. [13] In 1989, Hartzell produced sixteen-foot propellers for the Boeing Condor, another record-breaking aircraft. [11]
Whirl Wind Propellers Corporation, is an American manufacturer of composite propellers for homebuilt and light-sport aircraft. The company headquarters is located in Piqua Ohio. [1] The company makes composite ground adjustable aircraft propellers as well as replacement blades for the Nanchang CJ-6's V530 propeller and also airboat propellers ...
Powerfin produces carbon fiber two, three, four and five-bladed propellers for two-stroke and four-stroke engines up to the Rotax 914 of 115 hp (86 kW). [2] [4] [5] [6]The company is noted for its use of the Clark Y airfoil, infinite blade angle adjustment, as well as for the very low rotating inertia of its designs, a key wear factor on lightweight engine gearboxes.
The Voith Schneider propeller was originally a design for a hydro-electric turbine. [2] Its Austrian inventor, Ernst Schneider, had a chance meeting on a train with a manager at Voith's subsidiary St. Pölten works; this led to the turbine being investigated by Voith's engineers, who discovered that although it was no more efficient than other water turbines, Schneider's design worked well as ...