The modern gas tractor, its construction, utility, operation and repair: a practical treatise defining every branch of up-to-date gas tractor engineering, driving and maintenance in a non-technical manner. Considers fully all types of power plants and their components, methods of drive and speed changing mechanisms. Describes design and construction as well as practical application of tractors in the field (1919)
Pagé, Victor Wilfred, 1885-1947 · New York : Scientific American Pub. Co. · leaf 451
XJ b ^ D 0 !_f— 444 The ^Modern Gas Tractor steel gear located at the rear of the traction tread member,while the centre part is supported by two flanged idlerwheels which prevent the tread from slipping sidewaysand at the same time guide it properly. The advantagesof the track-laying type of… … Fig. 205.—Hart-Parr Little Devil Tractor is a Typical MediumWeight. Three-wheel Type. surface that it will not sink even into soft ground. Theground pressure is lighter than that of a man. Thearea to support the weight is so large that a horse wouldneed shoes having an area of 1 square foot each…
Farm engines · Internal combustion engines
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