AVERAGE SPEED
A. DASHBOARD METER
A demand was recently voiced in England , for .. a speedometer which would register the average speed at which the car has covered a trip. Manufacturers of these instruments replied that such speedometers had already been constructed, but that they : were difficult to keep within reasonable dimensions, and/were so expensive as to make it very unlikely that many would ever be sold.' A-recent issue of the *'Autocar," however, contains a description of an instrument which has been invented and, according to the inventors, can be-sold, at the price of
an ordinary speedometer which will record distance covered, actual speed, and also average speed in miles an. hour. ■The instrument is of a practical size, iind is driven in the customary way by a flexible shaft from the gearbox, and is known as tho averagometer.
Tho principle on which the avuragometer works is on a tangent method, the pointer reading at an angle representing the average speed by an automatic calculation of the distance covered and the time taken, and all' factors are indicated by tho instrument correctly within s,per cent. The instrument can be made to indicate either the running or the total average; that is, the average speed, taking into account the time spent in stoppages. It is proposed to give the clock in the completed averagemeter a total reading of eight hours and 320 miles, so that a travel of 45 degrees of the pointer would correspond to an average speed of 40 miles an hour, which should be as much as the great majority of drivers would require. To average 40 miles an hour for a day's run would necessitate travelling at an exceedingly high speed for long periods. A device is included in the design to prevent the instrument being damaged by overrunning, so that even, if a trip did happen to exceed 320 miles in eight hours, no harm would be done to the mechanism. The clock is rewound and the pointer reset to zero by one small knob on the front of the instrument.
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https://paperspast.natlib.govt.nz/newspapers/EP19290209.2.165.3
Bibliographic details
Evening Post, Volume CVII, Issue 32, 9 February 1929, Page 24
Word Count
344AVERAGE SPEED Evening Post, Volume CVII, Issue 32, 9 February 1929, Page 24
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