Streamlining Of Increased Importance
The enthusiastic owner of a very fast sports car in England, discovered that by flitting an undershield extending the full length of his car,, fuel consumption was improved by about 12 per cent. The maximum speed was improved slightly also.
This experience shows the futility of streamlining the upper portions of a car and leaving the running gear untouched,, as always is the case to-day. Some cars do not even have trays to bridge the gap between the engine and the chassis side members.
With the engine sump, the gearbox, and both axles exposed to the airstream beneath the car.. it can be realised what an impediment they offer to the free progress of the car. Air whirls and eddies about these exposed parts, head resistance is created, and a vacuum forms behind them. A smooth undershield, running the full length of the car would be a decided improvement, even in the ordinary touring vehicle. Another advantage would be that the parts which now become coated with mud would remain reasonably clean.
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https://paperspast.natlib.govt.nz/newspapers/NA19390125.2.42
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Northern Advocate, 25 January 1939, Page 5
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176Streamlining Of Increased Importance Northern Advocate, 25 January 1939, Page 5
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