AT THE HEART OF THE ROAD TRANSPORT INDUSTRY.

Call our Sales Team on 0208 912 2120

Passing Comments

11th November 1939
Page 18
Page 19
Page 18, 11th November 1939 — Passing Comments
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?

Accidents to Walkers ESPITE the black-out, in the Black-out Easy La' there seem to be more to Explain people walking in the road than

ever, and it is not surprising that accidents have increased, because even with the best of vehicle emergency lighting, it is extremely difficult for a driver to see darkly clothed persons until he is almost up to them. People, with no excuse, even cross the road a few yards away from traffic signals, and many appear to prefer the dangers of the road rather than those incurred by projecting buildings, lamp-posts, pillar-boxes, etc. It would not be so bad if they would walk so that they always face oncoming traffic and not kerb-crawl on the wrong side.

A16

An Ambulance in the THOSE who talk glibly of reHand is Worth Two I leasing vans commandeered at a Push for A.R.P. ambulance service

and recalling them when wanted, do not appreciate the difficulties that have to be faced. To fit an ordinary vehicle to carry stretchers, wooden frames have to be screwed to the floor ; also a considerable amount of first-aid equipment is required. In the event of a raid, an ambulance must be immediately available to take serious cases to hospital, so that a van that is at the other end of a town and loaded with merchandise is useless. Ignorant suggestions hamper the organizers of ambulance parties in their attempt to emulate the wise virgins,

Factors Affecting I NVESTIGATIONS hav e Surface Wear on• been carried out for some Concrete Roads . . years in New York State into

causes of differences in the durability of concrete surfacings. The main troubles are scaling and disintegration. Prolongation of life can be obtained by surface treatment or the use of a bituminous carpet. It is important to employ sand containing a high percentage of quartz and feldspar but a low percentage of clay. Sands which absorb moisture tend to produce scaling when subjected to alternate freezing and thawing. Studies of cement have shown it to be desirable to keep the tricalcium aluminate content as low as possible. So-called " natural cements' are weaker than Portland, but the durability of the concrete can be increased by using blended cements containing 14 to 28 per cent. of natural cement, the blending being carried out at the mixer. Engine Oil Frothing ESEARCH on frothing of and Its Results on engine oil, as experienced Bearing Wear . . menced by the I.A.E. Research in aero units, has been com

Department. As, to a -limited extent, this may happen in other types of engine, it is a subject of considerable interest. In the aero engine, however, it is largely due to the fact that with the dry-sump system the scavenge pump has more capacity than the pressure pump, so that air is sucked in. A testing apparatus has been devised in which a pump draws oil from an electrically heated tank, whilst air is admitted through a calibrated-orifice gauge and a needle valve in the suction line. Oil is delivered either back to the tank or into a measuring vessel. Methods of measuring frothiness are being developed and ways of de-aerating examined. Later, the effect of frothiness on the durability of bearings will be studied.

Tags

Locations: Portland

comments powered by Disqus