AT THE HEART OF THE ROAD TRANSPORT INDUSTRY.

Call our Sales Team on 0208 912 2120

U SE of a water tunnel, in conjunction with scale models

30th July 1948, Page 27
30th July 1948
Page 27
Page 27, 30th July 1948 — U SE of a water tunnel, in conjunction with scale models
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 commercial vehicles, has produced some interesting data in respect of dust creation and flow. The first problem presented to the Motor Industry Research Association, which carried out the experiments, concerned a coach operating in India, in which the volume of dust entering the vehicle through the jalousies—a type of venetian blind used instead of glazing— became objectionable.

Availability of material determined the use of a water tunnel, and flow paths were made visible for recording purposes by the use of a coloured dye in the water. The experiments carried out with the coach model indicated that the dust paths that travelled up the sides of the vehicle could not be appreciably affected by changes in the design of the front wings. It was found, however, that by increasing the ground clearance, the colour streams, representing dust, remained below axle height along the whole length of the vehicle.

The second series of experiments was carried out with a scale model of a new design of three-wheeled mechanicalhorse vehicle, having a single front wheel and an engine behind the cab. In this case, dust thrown up by the front wheel found its way into the engine through the air intake.

Despite the simplicity of the apparatus employed, the data obtained enabled suggestions to be made for effecting improvements. Concerning such experiments as a whole, the Association points out that they serve to show, within broad limits, what can be expected from changes in vehicle and body design with little expense and inconvenience, The possibility of installing larger and more elaborate equipment for studying the various problems connected with air flow past road vehicles, justifies serious consideration, says the Association,


comments powered by Disqus