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Tractor Now Offered To Civilian Users'

20th February 1953
Page 53
Page 53, 20th February 1953 — Tractor Now Offered To Civilian Users'
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THE type VIGIC medium industrial tractor made by David Brown Tractors Ltd., Meltharn, Yorkshire, is now available for general sale. Hitherto. it has been manufactured to Air Ministry specifications and supplied for towing the heavlest aircraft in general service. The model sold commercially varies only in minor detail from the Service version David Brown VIG/1C Model with Sixposition Towing Hitch and 15,000 lb.

Winch

and many parts are interchangeable with those of other David Brown machines.

Weighing nearly five tons, the VIG/1C is powered by a David Brown four-cylindered overhead-valve petrol engine with wet cylinder liners and shell-type main and big:end bearings. The engine, of 31-in, bore and 4-in. stroke, develops

41 b.h.p. at 2,300 r.p.m. (maximum) and gives a

maximum drawbar pull in excess of 7,000 lb. A three-speed-and-reverse gearbox provides forward speeds ranging from 1.45 m.p.h. in first gear to 12.22 m.p.h. in top, and a reverse speed from 1.94 m.p.h. to 4.47 m.p.h. Engine r.p.m. corresponding to these road speeds are 1,000 and 2,300. A Borg and Beck single-dry-plate clutch is fitted in conjunction with a Brock house self-priming turbotransmission unit with a torque multiplication ratio of 3 11. The oil level is automatically maintained from a reservoir. Final drive is through spiral bevels at the differential to spur reduction units at the wheels.

A six-position towing hitch at the rear gives a choice of drawbar height from 131 in. to 261 in., and a front towing hitch is centrally mounted on the bumper bar. Standard equipment includes a 15,000-lb. line-pull winch with sprag.

Girling 16-in, internal-expanding brakes are fitted on the rear wheels. Clayton Dewandre vacuum-servo trailer braking is also provided. The tractor has a 11-volt lighting and starting set and coil ignitinn.

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Organisations: Air Ministry

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