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Modular propellers may be fitted to aircraft as well as boats. [1] The benefits of a modular propeller are that its specifications (such as blade pitch or propeller diameter) may be altered to suit varying conditions; and it becomes much easier to replace damaged elements, such as a broken blade. Traditional one-piece propellers may be ...
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.
[clarification needed] The choice between using thrusters or traditional propellers to propel marine vessels is a compromise between versatility and efficiency. Propellers are designed to work in-line with a propulsion plant and produce one-directional thrust while thrusters are more customizable and have a more versatile application.
The Kamewa waterjets are still traded by Kongsberg Maritime under that name and are offered in five product lines in two product series.. Previous products from Kamewa has been the A-series, a mix flow pump in aluminum, the SII and P62 pumps in stainless steel and the Kamewa Advanced Propulsion Systems (APS) Waterjet developed specifically for the Volvo Penta diesel engine.
Composite materials may be considered an environmentally friendly option for propeller blades in some applications. While the composite blades are more resistant to corrosion and impact damage than many metal-alloy propeller blades, the water saturation and the propeller application decrease the longevity of composite propellers. [2] [3] [4]
The word is commonly used in the marine vernacular, and implies a mechanical assembly that is more complicated than a propeller. The Kort nozzle, pump-jet and rim-driven thruster are examples. An example propulsor is shown in the accompanying picture. It has a shroud which cuts down on blade-tip cavitation and radiated noise.