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New Light-alloy Grain Carriers
Page 102
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WITH a capacity of 1,000 Cu. ft. each, two new 15-16-ton bulk grain transporter semi-trailers have been supplied by
Carrimore Six Wheelers, Ltd., Finchley. London, N.12, to British Road Services.
They can be readily adapted for use with any of the makes of tractor in the B.R.S. fleet.
Light alloys have been incorporated in the construction wherever possible. The chassis frame is built up from alloy channel and angle sections, and is integral with the body. The two main
channel members extend the whole length of the body and are placed on the outside. There are three cross-members of the same section at the front and four at the rear.
A mild-steel rubbing plate with S.A.E./S.M.M.T. king pin, braced by steel members,
is bolted to the front of the frame. All cross-members
and longitudinal members are gusseted with light-alloy plates and are bolted up.
The tandem axle bogie assembly has a heavy-duty semi-elliptic spring on each
side and two centrally placed pivot brackets attached to the main frame. The two axles are located at the ends of the springs and the assembly includes four universally mounted radius arms to control axle movement and absorb brake torque All tour brake assemblies are of Girling two-leading-shoe type, actuated by a two-pipe line pressure system with emergency relay valve and air reservoir. Brake dimensions are 151 in. by 5 in. wide. The parking brake is a handwheel-operated screw type. Tyres on the twin wheels are 9.00-20 (12-ply).
Light alloy is also used in the fabrication of the vertical-lift screw-operated jockey wheels, the legs of which arc braced diagonally and longitudinally.
Light-alloy sections and plating are used for the body, which is 24 ft. 6 in. long and 7 ft. 111 in. wide. The outer upright framing material is of special tophat section, with heavy angles for the corner posts. All side panels are riveted to the upright members and bolted to the main chassis members.
The underside of the body is in the form of a hopper and the roof is framed with top-hat sections, cambered and covered in light-alloy sheeting. There are three rectangular apertures in the roof and two outlets, closed by light-alloy plates, in the bottom of the hopper. Two full-length catwalks on the roof are reached by means of a tubular ladder.