MHE huge Dunlop -I15.00 20 pneumatic tyre supported by an
Page 36
Page 37
If you've noticed an error in this article please click here to report it so we can fix it.
Austin Seven car, which is illustrated on this page, is a type which is now under test by a well-known British manufacturer of commercial vehicles of the heaviest types. It can carry a load of 4 tons 14 cwt. at an inflation pressure of 105 lb. per sq. in. The average dimensions over a number of this type when inflated are: diameter, 51.1 ins.; width, 15.8 ins.; effective radius under load, 23.6 ins.; weight with tube, 471/ lb. The rim diameter for the tyre is 20 ins., and the rimi width between the flanges 10 ins.
The Dunlop Rubber Co., Ltd., is to be congratulated upon being the first to produce on a commercial basis a high-pressure tyre of this size.
SO much interest has been displayed in the Daimler Fluid Flywheel and self-changing gearbox that The Daimler Co., Ltd., Daimler Works, Coventry, has issued a neat brochure, which is the first on the internal design and construction of these two units available to the general public. It is well illustrated and the descriptions are brief and simple. The company is willing to supply copies at 2s. each, plus postage.
AT a recent joint meeting of technical societies the chair was taken by Mr. Alan E. L. Chorlton, 0.13.E., M.P. In his opening remarks he made a plea for the full co-operation 1318 of engineering bodies with a view to their being more adequately represented in national affairs. He stated that he believes that he is the only mechanical engineer in Parliament. In view of the importance of the industry it is a sad state of affairs and one which may, to some extent, account for the official apathy towards engineering.
A SPECIAL exhibition is to be held in Copenhagen next September at which only British goods will be displayed. Denmark finds Britain her best customer for agricultural produce and is anxious to receive in return millions of pounds worth of manufactures, so that an equitable trading balance may be achieved. It will be the largest show in Copenhagen since the Scandinavian Exhibition of 1888 and will cover an area of 325,000 sq. ft. Heavy machinery and motor vehicles will be displayed in the Forum of the Tivoli, the world-famous pleasure park of Copenhagen.
IN the course of visits connected with municipal matters one obtains an insight into the duties of local-government officers, which is not only interesting, but shows that the general public is inadequately advised as to the extent to which its own thoughtlessness incurs public expenditure.
When it is realized that the cinders thrown into dustbins commonly amount to such h total as to provide the whole of the fuel required for a large electricity generating station, it will be seen that, not only is Money being wasted by householders, but public bills are increased in connection with the collection and disposal of this material. Actually, the motor vehicle effects a saving in this connection, but public education would enable still larger sums of money to be saved.
CONSIDERABINI use is being made of electric welding in quantity production. For instance, in the Austin Seven electric-resistance flash welding is utilized for the rear axle. There are four welds on the two tubes, and each takes three-quarters of a minute at a current consumption of one unit per , 22 welds. It has been found possible to work to extremely close limits, and in this case the operator merely loads the two tubes into their respective electrodes and by depressing a foot switch the welding is performed. So far 32,000 welds have been made without a single failure of any kind having occurred.
RESEARCH by Imperial Chemical Industries has shown that 165 gallons of high-grade motor spirit can be obtained from a ton of coal. It is hoped that this yield will eventually rise to 300 gallons. The 'report of the Fuel Research Board has shown that tests by its experts have produced 150 gallons per ton by hydrogenation.