This paper consist contains the result of experimental investigation on the braking performance of difference classes of road vehicle when new and as used on the roads. Measurements were made of the shortens braking distance obtainable on a dry surface and of the behaviour of cars during emergency braking on straight roads both when the brakes were properly adjusted and when they were deliberately put out of adjustment the condition of some braking systems observed on the road. The result confirmed early experiment with models but also showed that if the time interval between the front wheels locking and the rear wheels locking exceeds a certain curial value this has an important influence on the behaviour of the braked car. Measurements are described on the braking performance of commercial vehicles and how is affected bi loading and the characteristic of the braking system. Other investigation on the braking performance of public service vehicle, motor cycles and motor assisted cycles are also described. Certain discrepancies in the public figures for the braking performance of vehicles are discussed. The paper concluded with a summery of the braking problems which merit the attention of vehicle designer.
Samenvatting