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A string trimmer, also known by the portmanteau strimmer and the trademarks Weedwacker, Weed Eater and Whipper Snipper, [1] [a] is a garden power tool for cutting grass, small weeds, and groundcover. It uses a whirling monofilament line instead of a blade, which protrudes from a rotating spindle at the end of a long shaft topped by a gasoline ...
Evinrude Outboard Motors was a North American company that built a major brand of two-stroke outboard motors for boats. Founded by Ole Evinrude in Milwaukee, Wisconsin in 1907, it was formerly owned by the publicly traded Outboard Marine Corporation (OMC) since 1935 but OMC filed for bankruptcy in 2000.
The Fairbanks-Morse 38 8-1/8 is a diesel engine of the two-stroke, opposed-piston type. [1] It was developed in the 1930s, and is similar in arrangement to a contemporary series of German Bombers aircraft diesels. [2]
A stroke is the action of a piston travelling the full length of its cylinder.In a two-stroke engine, one of the two strokes combines primarily the intake stroke and the combustion stroke, while the other stroke primarily combines the compression stroke and the exhaust stroke, though technically since both ports are exposed during both the combustion and compression strokes, some reversion ...
Marine propulsion is the mechanism or system used to generate thrust to move a watercraft through water. While paddles and sails are still used on some smaller boats , most modern ships are propelled by mechanical systems consisting of an electric motor or internal combustion engine driving a propeller , or less frequently, in pump-jets , an ...
An immersed area of 0.1 m 2 at 1 m lever length at a boat speed of 2.5 m/s (about 5 knots) and 5° angle of attack already generates a moment of 180 N⋅m, when the oar has a NACA0012 profile. [7] The steering force of the servo oar is transmitted to the main rudder typically involving an arrangement of two lines and four or more rolls to guide ...
All 25 were equipped with the twin 800-horsepower engines of the 1962 and later Yard production. In 1970, the last nine boats of the class were produced at the Yard utilizing the 800-horsepower design of the remainder of the class. [2] Those boats in service in 1990 were refit with Caterpillar diesel main drive engines. [2]
2 × single 6 pounder guns; 4 × 20mm Oerlikon (2 × single, 1 × twin) 2 × twin .303 Vickers K machine guns; 4 × light boat depth charges; Searchlight; TSA smoke generator; Notes: Armament for gunboat configuration as fitted to MGB 658 by the end of the war. Specifications from Conway's All the World's Fighting Ships 1922–1946. and Motor ...