Recent content by ironstone11

Thank you. A very useful and interesting update. Another update here:- on YouTube.

Great pictures. Please keep them coming along the route if possible.

The 'concrete piles' were steel tubes which were to prevent the bored holes for the piles falling in. As the holes are filled with concrete the tubes are pulled out and at the same time the reinforcing cage is lowered into the hole. They are not always used for this type of piling. It depends on...

I wonder if UV lighting has been considered as a way of killing the bacteria.

Many thanks to LDECRexile, the photo contributors and the donors for keeping the thread running. I have followed the threads from part way through the Manchester - Liverpool to the present. The Blackpool - Manchester is particularly interesting as it must the one of the most, if not the most...

I have heard that the weight / axle load on the 755 exceeds the maximum allowed on the Marks Tey to Sudbury line. Can anyone confirm or deny this statement. Also the platform lengths at Marks Tey and Sudbury are each about 50m long. The length of the 755 surely exceeds this by a considerable...

Where is the evidence for that? I can't find any. Most of the Netherlands is 1500Vdc, therefore heavier and more robust structures are required. Reliability also depends on the complexity of junctions, line speed etc. Well, there you have it!

That is not how I read it. Marsh lane is stopped up where is crosses HS2. However, Marsh Lane going south towards the crossing is still accessible from the Stoke Mandeville bypass. The crossing is worse than the map and Google Earth makes it appear because the track is raised relative to the...

The Ordsall Chord was featured on Monday in Michael Portillo's Great British Railway Journeys, Series 8: 6. Blackpool to Manchester Victoria. The programme is available on iPlayer Here The section on the Chord starts at 16:13 into the programme.

Alarming! But why has it taken so long to find out what most observers knew anyway?

Yes, I agree. Most unusual to buy something without even having seen one, let alone tried it out on your own infrastructure. But then we don't expect normal decisions from DfT, although I am surprised at (Abellio) Greater Anglia. I foresee trouble ahead with claims and counter claims over...

If we are discussing Page 47, Fig 32, the "+25kV OLE" label is in the wrong place. As drawn it is in the same place as the return/earth/ground. The sine waves in Fig 32 should be shown out of phase. The lower one should be turned upside down.

Yes, another source (Network Rail. A Guide to Overhead Electrification) states they are made of cast iron. Makes sense as higher density than concrete. But surprised metal thiefs would be interested.

Hence the need to keep the wire at a constant tension by using weights and pulleys or spring tensioners. Weights and pulleys give a true constant tension whereas springs give an approximation to constant tension. Weights and pulleys if not maintained properly can seize and are prone to...

Why? Does gravity change over time or does the mass of the weights change over time? I think not, to either.