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The Waterman outboard engine appears to be the first gasoline-powered outboard offered for sale in significant numbers. [11] It was developed from 1903 in Grosse Ile, Michigan, with a patent application filed in 1905 [ 12 ] Starting in 1906, [ 13 ] [ 14 ] the company went on to make thousands of his "Porto-Motor" [ 15 ] units, [ 16 ] claiming ...
The company is also involved in the import and sale of various types of products, the development of tourist businesses, and the management of leisure, recreational facilities and related services. Yamaha's motorcycle sales are the second largest in the world [4] and Yamaha is the world leader in water vehicle sales. [5]
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.
A pump-jet, hydrojet, or water jet is a marine system that produces a jet of water for propulsion. The mechanical arrangement may be a ducted propeller (axial-flow pump), a centrifugal pump, or a mixed flow pump which is a combination of both centrifugal and axial designs. The design also incorporates an intake to provide water to the pump and ...
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 ...
Folding propellers reduce drag while not in use, thereby allowing for more speed or reduced fuel consumption. Folding propellers are no more efficient than fixed blade propellers, and have much poorer performance in astern. Less noise and vibration than fixed blades when not in use, since fluid flow will not cause the propeller to rotate.