Railway air brake, a type of brake operated by compressed air and used on locomotives and railroad cars
He was involved in key patent litigation during development of the telephone, the air brake, the steam turbine, the automobile, the airplane and the radio, as well as other electric appliances.
When the train was to be stopped, rheostatic braking was used first, after which friction brakes on the trailer cars were brought into action.
The metadyne equipment controlled four traction motors on two cars and allowed for regenerative braking, although an air braking was fitted for low speeds and if the traction supply was unreceptive to the regenerated current.
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AC traction systems, prime movers, head end power equipment, and computer systems are supplied by GE, while MPI supplies the brake systems, air systems, and cooling systems.