1000 Practical Air Brake Questions and Answers for Railroad Men

1000 Practical Air Brake Questions and Answers for Railroad Men

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1913 edition. Excerpt: ...quickly and lift the equalizing piston and blow the dirt from its seat. Q. On applying the brakes, we get the proper blow from the preliminary exhaust, but the train pipe pointer on the gauge don't drop and get no blow at the train pipe exhaust. Where is the trouble? A. The body gasket may be leaking air into the equalizing pressure, or the packing ring on the equalizing piston may be leaking train pipe air up into Chamber D as fast as we can get it out through the preliminary exhaust port. Q. If we could not get the equalizing piston to lift by reason of the preliminary exhaust port being stopped up, ci' for any other cause, how could we apply the brake? A. By going carefully to the emergency position. Q. Are there any rules by which we may calculate the brake cylinder pressure by a given train pi-pe reduction? A. About the best rule to calculate from is 21/_ to 1, with the proper piston travel, we say one pound reduction from the train pipe will develope 21/_, lbs. in the brake cylinder. It is not claimed that this is a precise rule, but it is a quick calculation. ' Q. Why will one pound reduction make 2% lbs. in the brake cylinder? A. Because with the standard piston travel, the space in the brake cylinder is 21/; times smaller than the space in the auxiliary. Q. Will the first 5 lbs. reduction give any braking power? A. No; it takes 5 lbs. to force the atmosphere pressure out of the brake cylinder compress the release spring, and drive the pistons out to bring the shoes up against the wheels. Q. Will we proceed to calculate brake cylinder pressure acording to train pipe reductions made? A. Yes. Q. To attach to the brake cylinder a gauge, then make a 5-lb. reduction, would the gauge show any brake cylinder pressure? A. No....show more

Product details

  • Paperback | 36 pages
  • 189 x 246 x 2mm | 82g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236984137
  • 9781236984135