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Al series electric loco's,
Is their any Electric Traction Engineers who can answer my Question.
In late 1967 I was on a Holyhead, Crewe, Euston Mail Train a class 40 brought it to Crewe, and I took over with an AL 5, the speed limit was still 100 mph, I pulled out of Crewe, and once clear of the platform I really notched her up I was soon at 50 mph and approaching a neutral section,the controller was showing 60% full power, I moved it back to the run back position, and once clear I opened her up to 80% full power, and I was soon on the magic 100 mph. At Rugeley I notched up more and next I was doing 105,and it did not shut down the traction motors, on approach to Litchfield I was on 110/111 mph, and suddenly their was an almighty crack, i must have left my seat about 10 inches, and considering the door to the engine room has a very small window, it was daylight in the cab, I closed my controller and thought what have I done, could smell like burning metal, when I dropped down to 80 I gingerly opened up, and nothing, 2 more notches and she was away. I checked in the engine room at Euston but could not find anything wrong so it was later back to Crewe, I believe 2 days later it failed, for what I do not know, I just kept Mum on it. can anyone tell me why it did not shut down at 100/101 mph as normal. Torquay. |
Hi Tony, Somewhere, there is the ghost of a shed foreman looking for you !
Regards Tony (currently on holiday in Spain). |
Hi Tony, having previously worked on heavy duty switchgear (but not railway locomotives) it sounds like you experienced a contact problem, sometimes where the two ends of electrical contacts join the current passing through them can create an amount of arcing which can weld the two ends together hence why the loco wouldn't shut down.
Eventually the current passing through this temporary contact will become too much for the joint then the two will seperate resulting in a flash over. In most cases you can still operate the switch gear afterwards although the contacts would wear out sooner rather than later, hence why you managed to keep going. One of my old workmates was working on a switchboard when this happened to him, the flashover resulted in him being burnt from his chest to knees, and it was made worse by a cleaning lady who was working in the corridor outside rushed in to see what was going on, saw him lying on the floor smouldering and then fainted landing on top of him pushing his melted overalls further into his wounds. He did make a full recovery after months of skin grafts. Cheers John |
Hi John, thanks for your input on the Electric Loco,sounds very feasible to me,at least the loco ran for a couple of day's before it packed in, then again it may have failed for something not related to the initial problem. Also i liked speed, even towards the end of steam, as did other drivers.
I am glad to see your friend made a good recovery from his incident. Thanks once again. Tony T. |
A L 5, Electric Loco.
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Keep well young man. Tony T. |
Give us a clue.
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This was my local shed in the '60's. Stuart |
Agecroft 26b.
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