If greater retarding effect possible with mechanically operated four-wheel brakes is to be fully realized, it is necessary to increase pedal pressure, increasing brake leverage and pedal movement, or increase of self-energizing effect; vacuum-type brake is amplifier which provides power to supplement muscular strength; capacity of various Westinghouse vacuum brake units; discussion includes comparison of brake-pedal force required for two-wheel and for four-wheel brakes. (See also Soc. Automotive Engrs. -- Jl., vol. 22, no. 6, June 1928, pp. 651-657, 14 figs.) (Motor Transport Sec.)
Power brakes for passenger-cars
Ry. Age
Railway Age ; 85 , n 8
1928
3 pages
6 Figs.
Article (Journal)
English
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