Power
Early rotaries had steam engines inside their carbodies to power the blades; a few are still in working order, and in particular one on the White Pass & Yukon Route in Alaska performs annual demonstration runs through thick snow for the benefit of photographers and enthusiasts. Newer constructed rotaries are either diesel or electric powered; in the latter case, an electric supply is required. Many steam plows were converted. Some electric plows can take their power from a locomotive, while others are semi-permanently coupled to power units, generally old locomotives with their traction motors removed; these are colloquially called "snails." (This is derived from the fact that engineless but motored units that take their power from another locomotive are "slugs" - thus the opposite, with engine but no motors, is a "snail.")
Read more about this topic: Rotary Snowplow
Famous quotes containing the word power:
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—Alice Foote MacDougall (1867–1945)
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—Frances Power Cobbe (1822–1904)
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—Toni Morrison (b. 1931)