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Post by superteacher on Aug 27, 2011 13:40:10 GMT
I am aware that the standard escalator gradient is 30 degrees to the horizontal, but are there many escalators on LU that do not conform to this standard?
The escalator that links the northern end of the northbound Bakerloo and Jubilee lines to the lower circulating area at Baker Street definitely feels like it has less of a gradient.
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Post by Deleted on Aug 27, 2011 14:53:27 GMT
The old 'A' type escalators were built to an angle of approx 26½ degrees. Replacements have had to be installed almost within that constraint and the angle is reported to be 27.3 degrees. Therefore, the lower landing is resited very slightly further back. There were 22 at 10 stations installed 1911-1915.
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Post by superteacher on Aug 27, 2011 15:19:25 GMT
The old 'A' type escalators were built to an angle of approx 26½ degrees. Replacements have had to be installed almost within that constraint and the angle is reported to be 27.3 degrees. Therefore, the lower landing is resited very slightly further back. There were 22 at 10 stations installed 1911-1915. Thanks - concise answer as always!  |
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Post by Deleted on Aug 27, 2011 18:28:32 GMT
A pleasure! |
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Post by Deleted on Aug 28, 2011 17:11:52 GMT
Ones I found that were on a more relaxed gradient are the ones at Baker Street, from where you go into the underpass from platforms, 1-4 with signs pointing to the northbound Bakerloo and Jubilee lines'. Running up these 2 steps at a time is a much easier task than the 30 degrees ones!
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Post by superteacher on Aug 28, 2011 17:32:21 GMT
Ones I found that were on a more relaxed gradient are the ones at Baker Street, from where you go into the underpass from platforms, 1-4 with signs pointing to the northbound Bakerloo and Jubilee lines'. Running up these 2 steps at a time is a much easier task than the 30 degrees ones! You wouldn't think a difference of 3 degrees would make that much difference, but I agree, they do feel a lot less steep. Now if the gradient was 45 degrees . . .  |
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Post by Deleted on Aug 28, 2011 17:40:51 GMT
Haha! They should have kept it at the original angle, far nicer
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mrfs42
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Post by mrfs42 on Aug 28, 2011 18:47:39 GMT
. Now if the gradient was 45 degrees . . . Slightly OT.... In my lissom youth when I had two real ankles I walked up Rhosydd Incline at the top of Cwm Croesor. Standard balanced incline for slate working. Drops 670 feet vertically. Takes 1250 feet horizontally to do it. Average gradient of 1 in 1.8 which is bad enough - as the incline is a parabola:  which means it rises to a gradient of 1 in three-quarters at the top: Clicky and looking up to the top (yellowish band across the trackbed)... ClickyIf there were runaways down the incline from the crewling point they would get about a half of the way down and start sailing across the valley to land rather explosively on the far side of the junction - which you'll find later in the flickr set. |
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Post by superteacher on Aug 28, 2011 18:50:47 GMT
Great pic! Shame there was no escalator there!
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Post by Deleted on Aug 28, 2011 19:25:17 GMT
As a matter of interest, some of the escalators in Paris have an incline of 35 degrees - e.g. Bastille 'A', Berault 'A' and 'B', Châtelet (6 out of the Métro's 17) and many more. Also, all 29 of the RER escalators at Châtelet - Les Halles are 35 degrees, along with a handful of others.
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Post by abe on Aug 31, 2011 7:31:06 GMT
Oxford Circus had two escalators at the non-standard angle. Apparently as part of the replacement work the shafts were 'adjusted' to allow standard 30 degree escalators to be installed, as these would be cheaper. I'm not entirely clear about how it was done, other than by the removal of lots of concrete. Presumably the shaft is still at the original angle, but the new escalator isn't parallel to the shaft.
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Ben
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Post by Ben on Aug 31, 2011 17:38:36 GMT
On the last transport webcast from the GLAs site, it would seem that LUL is under increasing pressure to install cheaper and less robust escalators, as current requirements are seen as exceedingly over-engineered...
I should know this, but whats the effective maximum angle that stairs can climb at?
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Post by Chris M on Sept 1, 2011 10:44:51 GMT
On the last transport webcast from the GLAs site, it would seem that LUL is under increasing pressure to install cheaper and less robust escalators, as current requirements are seen as exceedingly over-engineered... I thought they'd tried less robust escalators already with shopping centre-standard ones being used for the DLR at Bank. The ones that are being replaced with the more robust LUL-standard ones having become worn out after a fraction of their expected lifespan... |
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Post by edwin on Sept 3, 2011 0:47:25 GMT
I noticed some escalators seem slower than others... For instance on the JLE the escalators are among the fastest.
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Ben
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Post by Ben on Sept 3, 2011 12:15:31 GMT
Indeed. What is it they say about learning lessons from the past? And that was only a few years back...
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