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Post by Tubeboy on Jun 27, 2007 22:57:53 GMT
Will track the 38ts on trackernet!
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Post by Deleted on Jul 2, 2007 8:23:36 GMT
After playing back my footage of the tour one thing kept bugging me. I'm sure the 1938TS had a deeper whistle tone to it than the one currently fitted. Was this just to keep up with modern practices and to bring it inline with the current stocks.
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Post by Deleted on Jul 2, 2007 8:46:16 GMT
I don't think the stock have a default whistle sound, not if some of the 73ts' are anything to go by anyway. Some of them sound like a bird whistling at high speed more than a train whistle! ;D
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Post by CSLR on Jul 2, 2007 9:55:50 GMT
After playing back my footage of the tour one thing kept bugging me. I'm sure the 1938TS had a deeper whistle tone to it than the one currently fitted. Was this just to keep up with modern practices and to bring it in line with the current stocks. There is a requirement that the 1938TS sounds a whistle that matches current standards when operating on the LU system. To overcome this, a second whistle has been installed and is partly hidden away low down on the chassis below the driving position. This allows the unit to maintain its appearance by retaining the original whistle that it used during the time that it operated in service. The original whistle still works and it is possible to switch back to it when the unit is not running on a operational line.
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Post by Deleted on Jul 2, 2007 12:27:20 GMT
Thanks CSLR, shame the driver didn't give us a blast on the old whistle, but i suppose that would invole a pipework changeover. How is it switched between the two whistles?
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Post by CSLR on Jul 2, 2007 15:00:19 GMT
The route that the air takes to one or other of the whistles is preset by engineering staff and, to comply with regulations, cannot be changed by the train crew. I am sure that the motorman would have loved to have given you a blast of the original whistle but it would not have been allowed. The unit has to undergo a thorough test and be certified everytime that it goes out. The whistle is just one part of that test. I am afraid that if the wrong one was set, the unit would not be signed off as fit to run.
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Post by Deleted on Jul 2, 2007 19:27:06 GMT
Pure speculations here, but the change between old whistle and the new compliant one is probably just made with a diverting valve, fitted with a special key....
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