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edwin_m's latest activity
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Eedwin_m replied to the thread Lewes derailment - Thursday 13th August.To clarify, the force is compression rather than tension when the rail is above the Stress Free Temperature, which is when buckling is a...
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Eedwin_m replied to the thread Pros and cons of Continuous Welded Rail (CWR).The amount of force compressing the rail depends on the cross-sectional area. The amount the shape resists bending depends on the moment...
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Eedwin_m replied to the thread Banking trains in the UK.When the Todmorden Curve was removed in the 1970s the crossover and stub at the Stansfield Hall end was kept as a siding for banking...
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Eedwin_m replied to the thread Lewes derailment - Thursday 13th August.There is only one ladder per unit, so if your coach is on its side it's pot luck whether you have access to it.
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Eedwin_m replied to the thread Banking trains in the UK.If I recall correctly the auto-release is for trains with a buckeye coupler at the rear end, which will engage with the one on the loco...
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Eedwin_m replied to the thread Lewes derailment - speculation regarding potential causes, exact temperature, ground conditions etc.Hard to tell from this angle but the kink may coincide with the underbridge, suggesting perhaps that the embankment has slid to the...
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Eedwin_m replied to the thread Questions regarding signal overlaps and signalling history.I guess this is why it's called an overlap - the route from 1 to 3 overlaps with the onward route from 3.
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Eedwin_m replied to the thread Bad traffic enforcement.I guess people without cruise controls see others passing them and notice they've let their speed drop off a bit.
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Eedwin_m replied to the thread Pros and cons of Continuous Welded Rail (CWR).I think that was my point, apologies if we're at cross purposes. If the rail is increased in every dimension so its shape remains the...
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Eedwin_m replied to the thread Disruption at St Pancras (Possible Bomb Threat) 18/08/26.They didn't even blow the bl**dy doors off.
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Eedwin_m replied to the thread Pros and cons of Continuous Welded Rail (CWR).Deleted.
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Eedwin_m replied to the thread Bad traffic enforcement.Someone should tell this to a driver I had to follow most of the way from Loughborough to Nottingham last year, who had a tyre gradually...
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Eedwin_m replied to the thread Pros and cons of Continuous Welded Rail (CWR).Yes I agree, but if you double the cross-section you need twice as much force to create the same stress and therefore to restrain the rail.
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Eedwin_m replied to the thread Pros and cons of Continuous Welded Rail (CWR).However, the extra cross-section means the force necessary to keep the rail at the correct length will be higher. The thicker section...
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Eedwin_m replied to the thread Pros and cons of Continuous Welded Rail (CWR).Does the rail section actually have any effect? It makes the rail more resistant to tension and compression forces, but because the...