. Automotive industries . Flgs. 5-S—Brake connection layouts on the Darracq, Hlspano-Sulza. Isotta-Fraschlniand Metallurglque. In each case there Is one pedal and one brake lever. ance than the above, and the following figures have beenpublished as actual performance results for a hydraulicfour-wheel braking system: 1270 AUTOMOTIVE INDUSTRIES THE AUTOMOBILE June 16, 1921. 9—Front Wheel brake of Dufou r truck (1904). Speed15 miles20 miles30 miles40 miles60 miles Stopping distance 9 feet 16 feet 36 feet 64 feet 144 feet An examination shows that these are not performancebut theoretical figures,
. Automotive industries . Flgs. 5-S—Brake connection layouts on the Darracq, Hlspano-Sulza. Isotta-Fraschlniand Metallurglque. In each case there Is one pedal and one brake lever. ance than the above, and the following figures have beenpublished as actual performance results for a hydraulicfour-wheel braking system: 1270 AUTOMOTIVE INDUSTRIES THE AUTOMOBILE June 16, 1921. 9—Front Wheel brake of Dufou r truck (1904). Speed15 miles20 miles30 miles40 miles60 miles Stopping distance 9 feet 16 feet 36 feet 64 feet 144 feet An examination shows that these are not performancebut theoretical figures, for in every case from 15 to 60miles an hour the coefficient of adherence is found to Obviously the coefficient of adherence is not abso-lutely uniform in any series of practical tests over a widerange of speeds. Further, the coefficient adopted is toohigh, being a much more reasonable figure than such as these are harmful by reason of the wrongimpression they convey regarding the value of four-wheelbrakes. On all cars built in Europe the brakes are applied simul-taneously on the front and rear. There is no attempt toapply the rear wheel brakes ahead of the front wheelbrakes, nor has any such arrangement been found neces-sary in practice. The only exception to the above is the Fig. 10—Scat front wheel brake of 1910 showing inclined
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectaeronautics, bookyear
