NATS 1510 Lecture Notes - Lecture 8: Internal Combustion Engine, Snowmobile
11 Dec 2015
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Nats 1510 lecture 8 - snowmobiles and the small bore engine. Automobile industry has been slow to innovate. Considerable innovation in ic engine applications, development of small-bore ic engine. Small-bore ic engines used in snowmobiles, motorcycles, atv"s, motorboats, leaf blowers, lawnmowers. Two varieties: two-stroke and four-stroke, former pollutes more as it mixes oil with its gasoline supply and expels its unburnt fuel. Recreational machines produce noise levels from 85-100 db, hearing loss in operators without protection. Early versions of snowmobile, power sleds, late nineteenth century. Tracked sleds 1940"s, recognizable tracked wheel, ski-steering snowmobile design. Increased in popularity during 1970"s, several million owned. Bombardier"s ski-doo early success, speed and maneuverability. Bombardier increased share of market in 1940"s. Mandatory road clearing lowered demand, diversification: atv"s and all track vehicles. Primary use: recreation, small-bore engine technologies start as utility vehicles and transform into recreational vehicles.
