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Pages 42-47

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From page 42...
... 34 brake benefits to different values of coefficient of friction between the tank car and the ground. The range of values of coefficient of friction used in this sensitivity test will be based [on]
From page 43...
... 35 3.1 Coefficient of Friction-(Post derailment tank car kinetic energy dissipation) The contractor will perform a full-scale test to determine the coefficient of sliding friction between a tank car and the ground.
From page 44...
... 36 Appendix F Test Rack Results This appendix presents the test rack data that were received at the committee's request from New York Air Brake (NYAB) and Wabtec to illustrate the propagation of brake pressures over time in the event of a derailment.
From page 45...
... 37 FIGURE F-1 Brake pipe pressure drop for an ECP-only system after air hose separation 75 cars from the rear of a 150car test rack. Car numbers refer to the car position trailing the POD.
From page 46...
... 38 The control valve for the ECP-only system is different from the conventional brake control valve. That results in different air flow restrictions as compressed air flows to the BC from the auxiliary and emergency reservoirs.
From page 47...
... 39 FIGURE F-4 First 1.5 seconds for a pneumatic system after air hose separation 75 cars from the rear of a 150-car test rack. Car numbers refer to the car position trailing the POD.

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