Douglas Make Bus Chassis
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HE first bus chassis to be constructed Aby Douglas Equipment, Ltd., Cheltenham, has been shipped to South Africa, where its 32-seat body is to be constructed. The chassis has a gross vehicle rating of 10 tons and is powered by a Meadows 4DC.330 oil engine developing 90 b.h.p. at 2,400 r.p.m.
The integral engine and five-speed constant-mesh gearbox unit is mounted at the front of the frame and a forward.. seatingposition is provided for the driver. The chassis has a wheelbase of 19 ft. 6 in. and is 7 ft. 9 in. wide overall. The length is 25 ft. 9 in,, arid with an extension it can be increased to 30 ft. 9 in.
Bolted construction is used for the heavy-duty channel-section steel frame. Suspension at front and rear is by semielliptic springs, with double-acting shock absorbers. The brakes are hydraulic-air operated. The compressor is mounted on the engine and the reservoir is of 1,820-cu.-in. capacity.
Cam-and-double-roller steering is provided. Tyre size is 10.00 by 20, with singles at the front and twins at the rear. The turning circle is about 68 ft. The hypoid rear axle has a dust-proof breather and is a standard Douglas com
ponent. The overall ratios are; first, 35.7, second, 19.4, third, 13.8, fourth 9.05 and direct, 5.83 to 1.
With a gross vehicle weight of 71 tons the chassis has a designed maximum speed of 45 m.p.h.