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| Re: SMEE (245880) | |||
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Re: SMEE |
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Posted by Jeff H. on Tue Apr 25 19:42:41 2006, in response to Re: SMEE, posted by randyo on Tue Apr 25 18:52:25 2006. Very good discourse Randy.I will add that on many of these braking systems, such as AML, AMRE and AMUE, as implemented on NYC transit cars, an additional reservoir called the supplementary reservoir was used to provide higher braking pressure in emergency and to obtain certain features like graduated pneumatic release. A series of tests and regulations issued around the turn of the 20th century resulted in the standardization between manufacturers of mainline railroad air brake products. NYAB and WABCO were compatible on a component level, e.g. you could change out a WABCO triple valve with a NYAB and the bolt spacing and arrangement of ports against the pipe bracket were identical. Internally, however, the parts were completely different. This compatibility was not required in the traction world. I don't think you can take individual components from a NYAB NEWTRAN operating unit, like an inshot or charging valve, and apply them to a WABCO operating unit. Schedule SME braking for streetcars was limited to one motor car and one optional trailer car. Anything longer and an automatic system such as AMM was generally used. |
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