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Vacuum brake cylinder in running position: the vacuum is the same above and below the piston Air at atmospheric pressure from the train pipe is admitted below the piston, which is forced up. In its simplest form, the automatic vacuum brake consists of a continuous pipe—the train pipe—running throughout the length of the train.
A railway brake is a type of brake used on the cars of railway trains to enable deceleration, control acceleration (downhill) or to keep them immobile when parked. While the basic principle is similar to that on road vehicle usage, operational features are more complex because of the need to control multiple linked carriages and to be effective ...
The main competitor to the air brake is the vacuum brake, which operates on negative pressure. The vacuum brake is a little simpler than the air brake. Instead of an air compressor, steam engines have an ejector with no moving parts, and diesel or electric locomotives have a mechanical or electrical "exhauster".
The brake system on railcars No. 2, 3 and 4 was unconventional. Instead of the usual vacuum-actuated tread brakes used on most British rolling stock of the period, an automotive-style system was adopted, utilising vacuum-hydraulically actuated drum brakes. A vacuum brake cylinder and hydraulic master cylinder set was mounted on each bogie.
The vacuum brake operated automatically whenever the train brakes were applied. The use of vacuum braking instead of steam braking became standard practice on locomotives built from 1944 onwards and was welcomed by SAR drivers, who were always reluctant to make use of steam brakes for fear of skidding the coupled wheels.
The company was allowed to equip one eight car R44 train numbers 368-379, with one spare four car set of brakes each, making it a total of 12 cars equipped with same.. One trouble-free year later, New York Air Brake signed a $25 million contract to provide brake systems and controls for New York transit's entire fleet of 754 R46 subway cars ...
Robinson in fact took care to make the coupled boxes as large as possible, 9 by 9 inches (229 mm × 229 mm) on the two leading axles and 8 by 12 inches (203 mm × 305 mm) on the trailing set. A more likely source of initial trouble was the marine-type big ends fitted to the first five, since the sixth reverted to strap and cotter type.
Compressed air and Rheostatic brake system is provided for the locomotive and vacuum brake equipment is installed for the train braking. Engine Cooling Engine cooling arrangement consists of Street drive centrifugal water pump on the engine with the radiator and cooling ran located at the governor end of engine.
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