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The rear-engine mounting and simple construction allowed Gravely owners to service and even upgrade their engines on their own. Gravely also released an economy version of tractor in 1970, featuring a belt-driven 4-speed transmission and eight-horsepower (Kohler) engine, known as the 408. The engine was mounted at the front.
The combustion cycle can be either two-stroke (which results in a lighter engine for a given power output) [3] [4] or four-stroke (which produce lower levels of exhaust gas emissions). [5] [6] The fuel is usually either petrol or diesel. [7] In 1973, a small Wankel (rotary) engine manufactured by NSU was used in a lawn mower. [8]
The Twin Cylinder Engine – This engine was introduced in 1977 as a means of competing with Briggs & Stratton's rivals, particularly Japanese firms like Honda who were cutting into traditional Briggs & Stratton markets by producing lawn mower engines (and later, complete lawn mowers). These first models were rated 16 hp (11.9 kW) and displaced ...
The word traction from Latin, being the agent noun of trahere "to pull" in the sense of "drawn" [1] [2] [3] was used for the naming of traction engines developed circa 1870. [4] The first experimental electric traction motor tramway of 1875 was rapidly developed internationally for city use.
The alteration was made by fitting a long driving chain between the crankshaft and the rear axle. [7] The first half of the 1860s was a period of great experimentation but by the end of the decade the standard form of the traction engine had evolved and changed little over the next sixty years. It was widely adopted for agricultural use.
Robotic lawn mowers are increasingly sophisticated, are self-docking and some contain rain sensors if necessary, nearly eliminating human interaction. Robotic lawn mowers represented the second largest category of domestic robots used by the end of 2005. In 2012, the growth of robotic lawn mower sales was 15 times that of the traditional styles ...
A lawn mower (also known as a grass cutter or simply mower, also often spelled lawnmower) is a device utilizing one or more revolving blades (or a reel) to cut a grass surface to an even height. The height of the cut grass may be fixed by the mower's design but generally is adjustable by the operator, typically by a single master lever or by a ...
The GE Elec-Trak was the first commercially produced all-electric garden tractor, made mostly between 1969 and 1975 at GE's Outdoor Power Equipment Operation under Bruce R. Laumeister. [1] The previous work of Laumeister at GE on the experimental Delta electric car that debuted in 1968 helped pave the way for the production of the Elec-Trak. [ 2 ]