A New Material for Mudguard Construction.
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A substance called Pernax, better known for its insulating properties than for the characteristics that make it suitable for other than electrical purposes, is now being utilized by its maker, Croydon Cable Works, Ltd., Mitcham Road, Croydon, as a material for the wings of commercial vehicles.
Being unbreakable, springy, waterproof, durable and easily moulded, yet, when treated with bituminous paint, capable of receiving a glossy finish, the composition seems well suitable to such use. Moreover, we understand that Pernax wings cost less than the conventional metal type.
The wings are hand-mOulded to shape from sheet, the process being simple and inexpensive. Only a single mould is necessary—in fact, the existing metal wing can be used for the purpose. The rigidity depends upon the design, and, in some cases, an additional eon
Prominent personalities at the recent demonstration of steam wagons in London, organized by the Coal Utilization Council; brief details were published in our issue for last week and a further reference appears on page 310 of this issue.
Reading from left to right the group in. etudes, in the foreground, Major Parker Leighton, M.P. for Oswestry; Mrs. Ward, M.P. for Cannock Chase; Mr. Ernest Brown, Secretary for Mines ; Mr. Evan Williams, M.A., DL., LP., president of the Mining Association of Great Britain; Mr. F. G. Goddard, a director of the Sentinel Waggon Works, Ltd. ; Mr. T. Grieve, of the Grieve Haulage Co.; Mr. A. C. Hutt, chief engineer of the Sentinel Waggon Works, Ltd. (and designer of the new.type Sentinel shown in the Picture) and Mr. A. E. Jackson, a director of Fodens, Ltd.
coaled support may be necessary to reinforce the Pernax. This would probably consist of a thin steel strip placed under the arch of the wing along its centre line and bolted to the existing stays. Large-headed bolts are liked to fix the wing in the usual manner.
Welding Engineers' Meeting.
A meeting of the Institution of Welding Engineers will be held at the Institution of Mechanical Engineers, Storey's Gate, St. James's Park, London, S.W.1, on Wednesday, April 19, at 7.45 p.m., when three films, depicting (1) automatic metal arc welding, (2) automatic flash butt (resistance) welding, and (3) oxy-acetylene welding, will be exhibited.
A Rrupp Rail Coach.
The Krupp Co., of Essen, is the latest German concern to take up the construction of rail coaches on the lines of road vehicles. The Krupp 30-passenger coach is mounted on a pair of fourwheeled bogies, only one of which is driven by a 60 h.p. two-cylindered aircooled engine located in the centre of the chassis. The vehicle, which is stated to he able to attain a speed of 47 m.p.h., has an overall length of 28 ft. 9 ins, and a width of 8 ft. 9 ins.