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[quote user="croteaudd"] Greetings Bucyrus, Concerning your March 7 post at 8:06 a.m.: Your Q:  But I am really curious about your sorting system.  Please clarify whether you are referring to a revised methodology using conventional classification yards, or revised hardware that replaces conventional classification yards.  My A:  The second of the two choices. Your Q:  Please explain how you would sort cars without bleeding the brakes. My A:  As with a hump yard, tracks would be level and railcars thereon would not initiate movement by themselves with or without line air pressure.  Depending on the particular situation, because a railcar’s reservoir would not have been emptied by a carman, but have air in it, air lines could be filled quickly and cars could be on their way in no time.    [/quote] croteaudd,   So I understand that you are proposing a car sorting system that replaces conventional classification yards.  I would think that any railroader would be most receptive to hearing your ideas.  Convincing them might not be so easy, however.  <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p> As jeaton has mentioned, in order to keep the air bottled up in individual reservoirs, you would need to close the anglecock on each end of each car before uncoupling them.  Then upon recoupling the cars, coupling their air hoses, and opening the anglecocks, air must flow back into the hoses, so there would be some loss in trainline pressure from re-pressurizing the hoses.   <o:p></o:p> If this technique were applied to switching, you would have to consider that some cars stay together during switching.  Sometimes cuts of many cars remain together.  So your technique of bottling the air would suggest that you would not need to close the anglecocks between cars that will remain coupled.  However, hose couplings often leak to varying degrees, so air that is bottled up in cuts of cars will often quickly leak down through the hose couplings and allow the reservoirs to set the brakes.  This would suggest that if cars are to be switched, all anglecocks be closed even if some cars will remain coupled.       I would be interested to hear if others know of certain types of moves that are routinely done with the air bottled up.  I have very little experience with it.
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