Air Suspension On New Semi-trailer
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DUNLOP Pneuridc flexible-link-type air suspension is incorporated in a new 12-13-ton semi-trailer now in full production by R. A. Dyson and Co„ Ltd., Liverpool, 8. The single-axle semitrailer is known as the Dyson Mk. II, and is 26-ft. Tong and 8-ft. wide. A prototype has recently completed 20,000 miles in service with Liverpool Warehousing Co., Ltd.
Double-convolution air bellows are employed, and a laminated radius arm on each side of the semi-trailer provides longitudinal location and absorbs braking torque. Transverse location is provided by a single Panhard rod. Bellows pressure is controlled by two Dunlop levelling valves, the linkages to which incorporate nylon-bushed ball joints. Each spring has its own surge tank.
Rubber-bushed Suspension The air springs contain rubber bump stops, and rebound control is provided by check wires. Inclined telescopic dampers are fitted behind the bellows. The suspension is rubber-bushed throughout, thus eliminating the need for lubrication and this latest system is claimed to show a substantial saving in weight compared with the earlier trailing-arm type.
The semi-trailer chassis frame has pressed-steel side members, the maximum depth of which is 15 in. S.A.E./S.M.M.T. fifth-wheel coupling gear and wind-down landing gear are fitted, and the Dyson " high-speed " tubular axle carries Girling I54-in. x 6-in. brakes air-actuated through a two-line system.
Six • out of 32
IN a reserved decision on Tuesday, the I North Western Deputy Licensing Authority, Mr. A. H. Jolliffe, granted six A-licence vehicles of an application by Henry Gilbraith, Ltd., for 32 vehicles.
Gilbraiths had put in alternative applications for 32 A-licensed vehicles or 33 on 13 licence. The case was part heard in August and finished last Friday. The company had stated that 25 of the 32 A-licence units were on B licence, one on A licence, and six were to be acquired. One B-licence vehicle was sought for maintenance purposes.
Army Driving Contest
NAORE than 1,000 drivers of the Regu lar and Territorial Armies, including the Women's Royal Army Corps, will put their driving skill to the lest next month when they take part in countrywide driving championships organized by the British Army Motoring Association.
Teams from all Home Commands and from B.A.O.R. and S.H.A.P.E. are to take part in the contests, the main object of which is to improve the standard of driving and road safety of army drivers.
The Regular Army competition will take place from October 14 to October 20. Starting points will be Aldershot, Yeovil, Chester, Catterick and Colchester. The course will take competitors through 32 counties and will end at Catterick.
For the Territorials the competition will be held during the week-end of October 21-22. Starting points will be similar to those for the Regular teams, with the addition of Edinburgh and Ranby, Notts. Routes will be shorter but the tests will be no less severe.