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  2. Two- and four-stroke engines - Wikipedia

    en.wikipedia.org/wiki/Two-_and_four-stroke_engines

    The M4+2 engine, also known as the double-piston internal combustion engine, is a type of internal combustion engine invented by Polish patent holder Piotr Mężyk. [1] The M4+2 engine took its name from a combination of two-stroke engines and four-stroke engines. The two-stroke combustion engine is characterized by a simple construction and ...

  3. Outboard motor - Wikipedia

    en.wikipedia.org/wiki/Outboard_motor

    Four-stroke outboards have been sold since the late 1920s, such as the Roness and Sharland. In 1962 Homelite introduced a four-stroke outboard a 55-horsepower (41 kW) motor, based on the four-cylinder Crosley automobile engine. This outboard was called the Bearcat and was later purchased by Fischer-Pierce, the makers of Boston Whaler, for use ...

  4. Two-stroke engine - Wikipedia

    en.wikipedia.org/wiki/Two-stroke_engine

    Animation of a two-stroke engine. A two-stroke (or two-stroke cycle) engine is a type of internal combustion engine that completes a power cycle with two strokes of the piston (one up and one down movement) in one revolution of the crankshaft in contrast to a four-stroke engine which requires four strokes of the piston in two crankshaft revolutions to complete a power cycle.

  5. List of Perkins engines - Wikipedia

    en.wikipedia.org/wiki/List_of_Perkins_engines

    Perkins Diesel Conversions & Factory fitted units, by Allan T. Condie, 2nd edition 2000, ISBN 0-907742-79-3 The 4 107T was used in UK Military electricity generating sets, the engines when in need an overhaul were rebuilt by a Kent based engineering works in Ramsgate, adjacent to the inner Harbour known as Walkers Marine (Marine Engineers) Ltd. Houchins of Ashford an MOD contractor would send ...

  6. Power-to-weight ratio - Wikipedia

    en.wikipedia.org/wiki/Power-to-weight_ratio

    Power-to-weight ratio (PWR, also called specific power, or power-to-mass ratio) is a calculation commonly applied to engines and mobile power sources to enable the comparison of one unit or design to another. Power-to-weight ratio is a measurement of actual performance of any engine or power source.

  7. Rotax - Wikipedia

    en.wikipedia.org/wiki/Rotax

    The Rotax four-stroke aircraft engine line immediately dominated the emerging category of U.S.-certified "Light Sport Aircraft" (LSAs), powering most of them. [6] [14] One general aviation industry media reporter found that 70-80% of the 66,000 aircraft he'd identified, worldwide, used Rotax four-stroke engines. [14]

  8. Four-stroke engine - Wikipedia

    en.wikipedia.org/wiki/Four-stroke_engine

    Four-stroke cycle used in gasoline/petrol engines: intake (1), compression (2), power (3), and exhaust (4). The right blue side is the intake port and the left brown side is the exhaust port. The cylinder wall is a thin sleeve surrounding the piston head which creates a space for the combustion of fuel and the genesis of mechanical energy.

  9. Brake-specific fuel consumption - Wikipedia

    en.wikipedia.org/wiki/Brake-specific_fuel...

    Diesel 4-stroke Truck/Bus 0.302 184 [29] 45.8% 3,600 4,800 MAN Diesel 6L32/44CR Diesel 4-stroke Marine propulsion, Electricity generation: 0.283 172 [30] 49% 4,200 5,600 2015 Wärtsilä W31 Diesel 4-stroke Marine propulsion, Electricity generation: 0.271 165 [31] 51.1% 34,320 46,020 1998 Wärtsilä-Sulzer RTA96-C: Diesel 2-stroke

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