AT THE HEART OF THE ROAD TRANSPORT INDUSTRY.

Call our Sales Team on 0208 912 2120

Stress Recording by Electricity H IGHLY interesting investigations into the extent

23rd May 1947, Page 32
23rd May 1947
Page 32
Page 32, 23rd May 1947 — Stress Recording by Electricity H IGHLY interesting investigations into the extent
Close
Noticed an error?
If you've noticed an error in this article please click here to report it so we can fix it.

Which of the following most accurately describes the problem?

of the strains and stresses imposed in some of the major components of a chassis under operating conditions, are being made by the electronics section of the Motor Industry Research Association.

Instruments measure the differences in the electrical resistance of a fine wire, which is intimately connected to that part of the component under test. So minute are the recorded differences that an amplifier is necessary in order to increase the " swing " as shown on the cathode-ray tube.

The degree of swing right and left of the datum line is read against a known scale of stress values, and thus it is possible to determine the degree of stress effect of impact loading on the component. Permanent records are obtained by arranging a cine camera in front of the cathode-ray tube.

This is an interesting application of the electrical resistance method of stress measutement, but it is in its early stages of development for vehicle chassis.

At a demonstration last week Mr. R. Gresham Cooke, director of the Society of Motor Manufacturers and traders, whiell is supporting M.I.R.A., referred to the projected provision of a proving ground for the motor industry. He.Said that two aerodromes had been con sidered—one at Poddington in Bedfordshire, and another at Nuneaton. near the A5 road. The Ministry of Supply had offered facilities at its armouredfighting-vehicle testing ground at Chiabham. Surrey, and it was hoped that M.I.R.A. would snbmit a report on 'these three possible sites by the end of the month,

Mr. Cooke said that such a ground must be suitable for heavy commercial vehicles, as well as cars, and must be equipped with machine tools and Workshops, and facilities for 24-hour testing.

Mr, L. P. Lord, chairthan and Managing director of the Austin Motor Co., Ltd., is president of M.I.R.A., which is operating the test apparatus and workshops at the laboratory formerly owned by the I.A.E


comments powered by Disqus