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[7] [13] [18] [21] These are SOLAS-certified rigid-hulled inflatable boats designed to carry up to 15 persons. They are 6.35 metres (20 ft 10 in) long, with two Yamaha 67 kW (90 hp) outboard motors and an operational weight of 2,612.5 kilograms (5,760 lb).
A chopper is a propeller design largely of interest for production outboards on fast pad v-bottom boats. Unlike a cleaver the chopper's trailing edge extends aft with a large chord line at each radius.
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.
In marine propulsion, a variable-pitch propeller is a type of propeller with blades that can be rotated around their long axis to change the blade pitch. Reversible propellers—those where the pitch can be set to negative values—can also create reverse thrust for braking or going backwards without the need to change the direction of shaft revolution.
[8] [12] [28] [31] These are SOLAS-certified rigid-hulled inflatable boats designed to carry up to 15 persons. They are 6.35 metres (20 ft 10 in) long, with two Yamaha 67 kW (90 hp) outboard motors and an operational weight of 2,612.5 kilograms (5,760 lb).
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 ...
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