P assing Comments A German Official L'OR the testing of roadScheme
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for Testing 1 vehicle-lighting system's a Vehicle Lighting . . specially equipped hall in
Berlin is now available from Monday to Thursday eaCh week. This scheme has been organized by the Berlin Power Vehicles Authority and it was put into operation on December 1, in order to fill what has become a well-proven demand. Official tests for lights have hitherto been available in Berlin on only one night each week. The system, however, was' handicapped by lack of precision testing instruments and Specialized equipment.
Trackways to be Tried A SYSTEM of road construe Out in Argyllshire tion utilized in some to Save Cost . . . sparsely populated areas abroad is to be tested in Mull, where concrete strips to form trackways for vehicle wheels are to be laid down on fciur miles of roadway, thus obviating the need for repairing the whole surface. It is expected to cost about £800 per mile, HIS and the scheme was approved at a meeting of Argyll County Council in Dunoon on December 2. That the expedient should have to be adopted was deprecated by the chairman, who stated that the Ministry of Transport had promised to put all their first-class roads in order under the " crofter-counties scheme," and then insisted on a standard so high that it could not be faced.
A Novel Idea for TN a recent issue The Motor Combating the I illustrated a most interest Dangers of Fog , ing device that has been adopted in America to make things easier for the driver in foggy weather. This comprises two white lines painted along the road so that the driver can follow either the kerb or the white line. So long as he keeps within the kerb and the white line, the middle of the road is left free for overtaking traffic. The value of the idea is enhanced, however, by the fact that at each approach to a cross-roads or dangerous corner, the white lines are "wriggled," Why the B.R.F. Should HE British Road Pedera Have Power and tion should certainly now Authority . . . . be in a position to spea.k with
strength and authority, for with the admittance to membership of the National Federation of Associated Paint, Colour and Varnish Manufacturers, and a similar federation of Produce Merchants, it is now comprised of 39 national organizations. These, together, cover practically all the various interests of the commercial road industry.
MANY authorities hold that the two-stroke-cycle prime mover holds the biggest possibilities, particularly when working on a compression-ignition system. An important event is the introduction of an industrial-type oil engine by Petters, Ltd.. Yeovil, which gives a b.m.e.p. of 60 lb. to 70 lb. per square in. This is the equivalent of twice that pressure in a four-strokecycle unit. This improvement is obtained by using the harmonic waves in the exhaust to induce the Two-stroke Oil Engine Working on a New Principle . . . scavenge air stream. The additional power output has been obtained without the complication, cost or weight of a blower for scavenging—as distinct from pressure charging—but the performance is of the same standard as has been obtained with independently scavenged. engines.. At the moment, the "harmonicinduction engine" is primarily intended for constantspeed working, but it may be developed for "flexible" services, such as road transport, and affords an. interesting technical possibility.
1 T is claimed by the chief metallurgist of an important American company that tests with a new bearing alloy comprising cadmium, silver and copper, show that it lasts three times as long as the best white-metal-lined steel bearings now employed. The difficulties hindering its immediate adoption are the frequent changes in price of the more expensive materials, and corrosion caused by organic acids in lubricants. Experts are now trying to eliminate the latter factor.
New Bearing Alloy Which Gives Triple
Life