A Diesel-engined Tractor.
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ORIGINALLY introduced for agricultural purposes, petrol tractors_ are now being widely used in Germany for road-haulage purposes, as, indeed, in many other countries, with the result that quite a number of engineering eonl cerns in .that country is now building machines of this type to meet the growing demand. The accompanying illus
trillion depicts one of the latest tractors to be put on the market—the Colo, which is being made by the Suddeutsehe l3remsen Gesellschaft, of Munich.
The feature of the machine is the use of a three-cylindered Dieselengine, whirl, with a bore and stroke of 125 min. by 180 mm. respectively, is stated to develop 30 b.h.p. The engine is of the non-compressor, four-stroke type. No ignition in the ordinary sense of the term is provided, this being automatically effected on the Diesel principle, a detonating cartridge being used to secure the initial starting. The engine drives the rear differential axle through a plate clutch, threespeed gearbox and bevel gearing, the differential shafts driving the rear wheels through gearwheels mounted on their outer ends.
The tractor has a wheelbase of 6 ft. and a track of 4 ft. 7 ins., the overall length being 11 ft. Solid tyres are used on all wheel's, those at the front being 860 mm. by 130 rem. singles, and those at the rear 1,065 mm. by 150 mm. twins. The weight of the tractor in running order is given as 3 tons 6 cwt., of which 2 .tons 611; cwt. is on the rear axle and 19-i cwt. on the front axle.