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A Bunch of Questions (Some for Techies, One for the Magazine Guys)
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[quote]QUOTE: <i>Originally posted by oltmannd</i> <br /><br />Daniel asked: <br /> <br /> <br />"13.) Why are there two air brake connection hoses for the independant brake from unit to unit? Would not one hose be sufficient? <br /> <br />14.) Would somebody please be so good as to explain the basics of two-hose/graduated release braking systems to me? <br /> <br />15.) What does the dead-in-tow engine feature on the brake system do? Specifically, why couldn't you just use the engine's normal braking system, with the stand cut-out, in the middle of the train?" <br /> <br />13. There are duplicate sets of hose connections on each side of the end sheet so you can MU either end of a locomotive w/o having hoses crossover. Just one hose per feature is needed <br /> <br />14. Graduated release and the two hoses on a passenger train are unrelated. The second hose is for communicating to the cab from the train. Graduated release lets the engineer reduce the braking cylinder pressure by increasing the brake pipe pressure in steps. <br /> <br />15. The dead engine valve allows a loco to act like a frt car. Otherwise, it'll act like a locomotive and depend on those MU air hoses to control the brakes. <br /> <br />I'm a bit rusty at this stuff. Maybe someone else can clarify or amplify. <br />[/quote] <br /> <br />Dear Oltmannd, <br />13.) I know why there are hoses on each side, but I saw two independant brake hoses (one for "application," one for "release") on each side of a locomotive (for a total of four), in addition to the main reservoir connection hoses. I know they were for the independant brake hoses because I asked the engineer. <br /> <br />14.) I know the MU and HEP cables, but I am pretty sure that there are two hoses on graduated release systems. I just don't understand why it wouldn't work with one hose. <br /> <br />15.) But what about a steam locomotive? MU doesn't come into play, and as best I can tell, the brakes should work just fine if the brake stand is cut out (think simple, like no. 6 brakes). <br /> <br />I have a new question: <br /> <br />16.) Back in timetable and train-order days, on lines that didn't use train-number (indicator) boards, how would the engineer waiting for a train at a siding know which locomotives had which trains? It would say on a train order, but what about scheduled runs? <br /> <br />Thank you very much. <br /> <br />Sincerely, <br />Daniel Parks
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