Abstract
THE “Motor Car Hill-Climbing Chart” consists of a card 5½ by 3½ inches, on the face of which there is a sliding card. The sliding card has a square hole in it covered by a transparent sheet. On this is drawn a brown curve representing the resistance due to average road and wind resistances at different speeds. Through the window three other curves, the forms of which have been determined by experiment, may be seen. These are of different colours, and are adapted to suit one each of the three gears. The sliding card can be set by means of a scale to a position corresponding to any gradient up or down. Then the intersection of the brown curve with one or other of the other curves shows which gear should be used what speed the car should go, and the r.p.m. of the engine when the car is in good order. If the curves have been produced by experiment with the particular car, no doubt useful results will be obtained, and that most conveniently, but until all cars are alike it is difficult to see what use it will be on somebody else car.
Motor Car Hill-Climbing Chart. To Show the Speed at which a given Motor Car can Climb any given Hill—to Show also the Gear upon which it can do so—and the Engine Speed in Revolutions per Minute.
(London: Edward Stanford, n.d.) Price 1s. 6d. net.
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Motor Car Hill-Climbing Chart To Show the Speed at which a given Motor Car can Climb any given Hill—to Show also the Gear upon which it can do so—and the Engine Speed in Revolutions per Minute . Nature 86, 210 (1911). https://doi.org/10.1038/086210b0
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DOI: https://doi.org/10.1038/086210b0