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The company was established as the "Toro Motor Company" in 1914 to build tractor engines for The Bull Tractor Company. [4] In 1948, Toro entered the push mower market, acquiring Whirlwind Corp. They sold push mowers under this name for several years. In 1952, the Whirlwind's factory in Windom, Minnesota was closed.
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The Series 92 engines were introduced in 1974. [7] Compared to the Series 71 engines they were derived from, the Series 92 featured a larger bore of 4.84025 ± 0.00125 in (122.942 ± 0.032 mm) and an identical stroke of 5 in (130 mm) for a nominal displacement per cylinder of 92 cu in (1,510 cc), from which the Series 92 derives its name.
Boxer crankshaft configuration. Most flat-twin engines use a boxer configuration for the crankshaft and are therefore called "boxer-twin" engines. In a boxer-twin engine, the 180° crankshaft moves the pistons in phase with each other, therefore the forces generated by one piston are cancelled out by the other, resulting in excellent primary balance.
It was produced in sizes ranging from 1/2 to 3 horsepower (2.2 kW) and the company had plans to offer a scaled-up version capable of 25 horsepower (19 kW) or more. [1] The Atkinson differential engine was a two piston, single cylinder four-stroke engine that also used a displacer piston to provide the fuel air mixture for use by the power ...
The regenerative Rankine cycle is so named because after emerging from the condenser (possibly as a subcooled liquid) the working fluid is heated by steam tapped from the hot portion of the cycle. On the diagram shown, the fluid at 2 is mixed with the fluid at 4 (both at the same pressure) to end up with the saturated liquid at 7.
SABRE (Synergetic Air Breathing Rocket Engine [4]) is a concept under development by Reaction Engines Limited for a hypersonic precooled hybrid air-breathing rocket engine. [5] [6] The engine is being designed to achieve single-stage-to-orbit capability, propelling the proposed Skylon spaceplane to low Earth orbit.
A 32 cc (32 cm 3; 2.0 cu in) engine can swing a 2.75 mm (0.108 in) line and often has metal-blade accessories. Most trimmers use two stroke engines and require gasoline mixed with oil. Due to pollution laws four stroke engines are becoming more popular, particularly in the commercial