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snow blower
A snow blower or snow thrower is a machine for removing snow from an area where it is not wanted, such as a driveway, sidewalk, roadway, railroad track, ice rink, runway, or houses. The misnomer "snow blower" is often used, as both both single stage and two stage machines actually throw the snow using an auger or impeller instead of blowing it. It can use either electric power (line power or battery), or a gasoline or diesel engine to throw snow to another location or into a truck to be hauled away. This is in contrast with the action of snow plows, which push snow to the front or side (shovels can be similarly used).
Snow throwers range from the very small, capable of removing only a few inches (a few cm) of light snow in an path, to the very large, mounted onto heavy-duty winter service vehicles and capable of moving wide, or wider, swaths of heavy snow up to deep. Snow blowers can generally be divided into two classes: single-stage and two-stage.
==Jet-engine snow blowers==
Jet engines and other gas turbines are used for large scale propelling and melting of snow over rails and roads. These blowers first were used in Russia and Canada in the 1960s as the large amounts of snow fall were becoming problematic for their train tracks and road ways, and were later introduced into the US by the Boston Transportation Authorities.
The jet engine allows to melt the snow on the tracks and clear the roads faster than other methods, as they offer considerably greater power in a relatively lightweight machine. However, this method is much more expensive than traditional snow removing methods. In Russia, the high cost is partially negated by utilizing retired Jet Fighter engines to this end, such as the Klimov VK-1.〔http://www.cracked.com/article_19624_5-absurd-solutions-to-huge-problems-that-actually-worked_p4.html〕〔(Canadian jet engine used for railroad snow and ice clearing )〕〔(Russian road clearing Klimov VK1 engine )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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