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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 ...
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]
Unlike a standard one-piece boat or aircraft propeller, a modular propeller is made up of using a number of replaceable parts, typically: a set of matched blades; a propeller hub; and; an end cap to retain the blades and to secure the propeller as a solid unit. Ground-adjustable Arplast modular propeller on ARV Super2
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.
A ducted propeller, also known as a Kort nozzle, is a marine propeller fitted with a non-rotating nozzle. It is used to improve the efficiency of the propeller and is especially used on heavily loaded propellers or propellers with limited diameter. It was developed first by Luigi Stipa (1931) and later by Ludwig Kort (1934). The Kort nozzle is ...
Naval Weapons Station Earle, originally known as the Naval Ammunition Depot Earle, is a United States Navy base in Monmouth County, New Jersey, United States. Its distinguishing feature is a 2.1-mile (3.4 km) pier in Sandy Hook Bay where ammunition can be loaded and unloaded from warships at a safe distance from heavily populated areas.
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