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Post by setttt on Jan 29, 2006 19:58:38 GMT
I was once told that it was possible to center the key, then drop the handle, while the train was still in motion, without getting an emergency brake application on older stocks (basically anything with two handles). I assume that the 'A' stock (being the only example left) has been modified to prevent this from happening, and if so, when was it modified?
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Post by Deleted on Jan 29, 2006 21:00:12 GMT
It was modified on OPO conversion. When there was a guard he would stop the train if the driver collapsed with the key centered without applying the brakes in a station , as there is no Guard now there is a holding brake available at all times even with the key centered.
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Post by Deleted on Jan 29, 2006 23:36:25 GMT
I was once told that it was possible to center the key, then drop the handle, while the train was still in motion, without getting an emergency brake application on older stocks (basically anything with two handles). I assume that the 'A' stock (being the only example left) has been modified to prevent this from happening, and if so, when was it modified? When you center the key, you do not get an emergency brake application, you get a Full EP application, as you do if a PEA is operated.
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Post by setttt on Jan 30, 2006 7:42:18 GMT
Thanks Jim, just the answer I needed. MA - not sure where you're coming from there - I didn't ask what type of brake application you get...
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Post by Deleted on Jan 30, 2006 12:23:14 GMT
MA - not sure where you're coming from there - I didn't ask what type of brake application you get... You said that when you centered the key you got an emergency brake application, I was correcting you as this isnt the case.
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Phil
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Post by Phil on Jan 30, 2006 12:38:16 GMT
You said that when you centered the key you got an emergency brake application, I was correcting you as this isnt the case. MA, mate, I think it's time for an eyetest Seth's original post said exactly the opposite of what you've just posted.
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Post by setttt on Jan 30, 2006 16:45:52 GMT
You said that when you centered the key you got an emergency brake application, I was correcting you as this isnt the case. MA, mate, I think it's time for an eyetest Seth's original post said exactly the opposite of what you've just posted. Quite. I was commenting on the fact that it is no longer possible to center the key when in motion and coast, having dropped the handle.
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Post by Deleted on Jan 30, 2006 18:57:26 GMT
MA, mate, I think it's time for an eyetest Errm no thats not the case. Seth's post included the following: I was once told that it was possible to center the key, then drop the handle, while the train was still in motion, without getting an emergency brake application My orioginal and second post was correcting him, as you do not get an emergency brake application, instead you get a Full EP application. For your benefit, incase you missed it the first time round, my original post read as follows: When you center the key, you do not get an emergency brake application, you get a Full EP application, as you do if a PEA is operated. So guys, before you jump at me with your quick comments, I would suggest you read my posts properly!
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Post by setttt on Jan 30, 2006 19:18:05 GMT
When you center the key, you do not get an emergency brake application, you get a Full EP application, as you do if a PEA is operated. Surely you get an emergency westinghouse application as well, because the EP brake isn't fail safe, or something along those lines...? That's how I justify saying 'emergency brake application' anyway.
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Post by Deleted on Jan 30, 2006 19:35:00 GMT
When you center the key, you do not get an emergency brake application, you get a Full EP application, as you do if a PEA is operated. Surely you get an emergency westinghouse application as well, because the EP brake isn't fail safe, or something along those lines...? That's how I justify saying 'emergency brake application' anyway. The Deadman pressure switch as it is known works on EP only and is not failsafe, as it is only used when the train is stopped the risk is minimal. I believe this was the only was this modification could have been done to this stock, on C and 72 stocks if the EP fails you will get a Westinghouse application.
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Post by setttt on Jan 30, 2006 19:37:36 GMT
The Deadman pressure switch as it is known works on EP only and is not failsafe, as it is only used when the train is stopped the risk is minimal. I'm confused. Does that mean that, should the EP brake fail and the handle be dropped, the train would continue to move without a brake application being made?
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Post by Deleted on Jan 30, 2006 19:40:17 GMT
The Deadman pressure switch as it is known works on EP only and is not failsafe, as it is only used when the train is stopped the risk is minimal. I'm confused. Does that mean that, should the EP brake fail and the handle be dropped, the train would continue to move without a brake application being made? Not in a motoring position, in Forward 1, 2 and reverse, you will get n emergency westinghouse application. The modification was only to give a brake in the off posiition.
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Post by setttt on Jan 30, 2006 19:46:32 GMT
Ahh! It makes sense now... thanks Jim.
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Post by Deleted on Jan 30, 2006 19:53:09 GMT
Always welcome
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