. Electric railway journal . pacity withfewer cars, or it enables the same average speeds, schedulesand capacity of road to be maintained as with a purelypneumatic brake, but at the expenditure of less power. EMERGENCY STOPS In an emergency a ten-car train with electro-pneumaticbrakes can be stopped from a speed of 40 in 350 ft.,or within two-thirds of its own length. A train with theold-style quick-action brake would pass this stopping pointat a speed of This is 71 per cent of its origi-nal speed and corresponds to 59 per cent of the energyoriginally stored up in the train
. Electric railway journal . pacity withfewer cars, or it enables the same average speeds, schedulesand capacity of road to be maintained as with a purelypneumatic brake, but at the expenditure of less power. EMERGENCY STOPS In an emergency a ten-car train with electro-pneumaticbrakes can be stopped from a speed of 40 in 350 ft.,or within two-thirds of its own length. A train with theold-style quick-action brake would pass this stopping pointat a speed of This is 71 per cent of its origi-nal speed and corresponds to 59 per cent of the energyoriginally stored up in the train which still remains to beovercome before the train can finally come to rest. Itshould be further noted that the train with the old-stylequick-action electro-pneumatic brakes would reach the350-ft. mark four seconds before the train with electro-pneumatic brakes comes to a standstill at this point. Atthe time that the train with electro-pneumatic equipmentcomes to a stop the train with old-style quick-action brakes To Trolley. Diagram of Electro-Pneumatic Brake Equipment as Applied to New York Subway Cars plished by the addition of electric control to the serviceand emergency functions of the quick-action automaticbrake. SERVICE STOPS As illustrating the comparative power of the electro-pneumatic and the best automatic air brake it may be saidthat a ten-car train equipped with electro-pneumatic brakescan be brought to a full stop from an initial speed of in the same time required to reduce the speed of aneight-car train equipped with the old-style quick-actionbrake to 25 This is 62J _> per cent of its initial speedand about 39 per cent of the energy originally stored inthe train at 40 still remains to be overcome beforeit can be brought to a standstill. The electro-pneumatic brake has even greater advan-tages in completing the stop. With the electrD-pneumaticbrake a graduated release was made so as to prevent retar-dation becoming excessive toward the e
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