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Post by jardine01 on Mar 11, 2011 18:20:52 GMT
Does anybody know what the top speed of the C stock is i guess 45mph but not sure can anybody help? Thanks  |
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Post by Dstock7080 on Mar 11, 2011 18:35:45 GMT
"officially" they are 'limited' to 40mph which is done by the use of a red sticker on the Operators console.
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Deleted
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Post by Deleted on Mar 12, 2011 21:59:08 GMT
But between Barking and South Kensington - especially when they're in front of me - they usually manage 25mph! Probably get a nosebleed if they go any faster....  |
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Ben
fotopic... whats that?
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Post by Ben on Mar 14, 2011 5:25:56 GMT
S2S suggests that it theoretically is 60mph, the LT117 motors running at 3,800 rpm at that speed with a 94/14 gear ratio and 36 inch wheels.
What kind of speeds did they achieve in the 70s when they covered up to Amersham?
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metman
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Post by metman on Mar 14, 2011 15:49:11 GMT
Not sure but they may have sounded like a cat being strangled!!
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Post by ruislip on Mar 14, 2011 17:01:01 GMT
Did they ever get over 50mph when they had to ride up to Amersham in the mid-70s to cover for their older brethren?
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metman
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Post by metman on Mar 14, 2011 17:30:29 GMT
If they had a weak field flag I don't see why they couldn't have done. Again, with much screaming of the LT117s! In the orignial seating formation it would have been a reasonable journey barring the suspension although Met users would be used to it! Where's that photo of the C69 with Amersham in the front window....
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Deleted
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Post by Deleted on Mar 14, 2011 19:13:07 GMT
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Post by t697 on Mar 14, 2011 19:32:46 GMT
Did they ever get over 50mph when they had to ride up to Amersham in the mid-70s to cover for their older brethren? Quite likely. The C77 batch have a 'high speed rheo brake lockout' that stopped the rheo brake working at speeds above about 53mph. The C69 batch didn't have that. Service experience perhaps? |
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Post by superteacher on Mar 15, 2011 19:19:11 GMT
They used to belt along between Barking and East Ham a few years ago.
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Deleted
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Post by Deleted on Mar 18, 2011 7:41:47 GMT
If they had a weak field flag I don't see why they couldn't have done. Again, with much screaming of the LT117s! In the orignial seating formation it would have been a reasonable journey barring the suspension although Met users would be used to it! Where's that photo of the C69 with Amersham in the front window.... They do have a Weak Field flag, though it no longer works on a fair number of units and not many drivers deploy it. I have observed one reach 55mph (with the flag up on a working unit). |
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Deleted
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Post by Deleted on Mar 18, 2011 22:11:28 GMT
All Met trains west of Finchley Road should have the flag up
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Post by jammers on Mar 21, 2011 18:55:45 GMT
Excuse my ignorance but what is a Weak Field Flag?
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Deleted
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Post by Deleted on Mar 21, 2011 18:59:31 GMT
Excuse my ignorance but what is a Weak Field Flag? Weak Field is where on a DC series wound motor the field winding current is reduced and allows the motor to spin faster. The flag switch is quite simply a switch for the purpose of changing this setting, but one rather visible in the cab window when in operation! |
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Post by jammers on Mar 22, 2011 23:13:20 GMT
Excuse my ignorance but what is a Weak Field Flag? Weak Field is where on a DC series wound motor the field winding current is reduced and allows the motor to spin faster. The flag switch is quite simply a switch for the purpose of changing this setting, but one rather visible in the cab window when in operation! Thanks |
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