Terra-Nova2

48 minutes ago, Flittersnoop said:

Pity the poor sods in Wolverhampton, etc who currently have a good service of fast trains direct to London but, thanks to the wonderful "progress" that HS2 represents, will now have to put up with slower journeys or getting off at New St, walking to Curzon Street and waiting for the next HS2 train!

 

Of course, the problem of putting a 125mph train on the new line wouldn't arise if the new line wasn't being so ridiculously and expensively over-specified! 

 

It is only a slight exaggeration to say that the only way HS2 could have been designed worse would have been for it  to use a different gauge.

 In a rare break from apathy , I actually submitted a comment to one of the consultations, suggesting a link from  Curzon Street onto the Duddeston Line as a relatively cheap  way of allowing trains to continue to Wolverhampton and other destinations, especially if it were included from the outset and not necessarily connected to all platforms. It would mean a reversal but the two lines cross anyway and it is in an area where speeds are low. Given its simplicity , I would have thought it could work commercially and provide an emergency exit to Curzon Street 

I received a very general reply which didn't answer the point.

I guess the teams are now looking for ideas to remove cost rather than even modest increases, although there was a recent change to include passive provision for an additional  link to Liverpool.

The original concept also envisaged a link, presumably going in the other direction to allow trains to continue to Bristol, but this didn't seem to make it to the consultation. 

I usually take the simple way out and read the input output ratings marked on the item. For people like me you need your best glasses and maybe even a magnifying glass. The ac or dc bit is usually in symbol .ie sine symbol ac, and parallel lines dc. It’s quite rare for this not to be there.

It may prove useful to go old school. 2.33mm is, at a reasonable level of accuracy, 3/32”. This measurement is available on good steel rules.

17 hours ago, The Stationmaster said:

Is that  for a 17ft 6" signal. (distance of the arm horizontal centre line above rail level) or a taller one?

There are two single post drawings 

One is a 23' Stop and Distant Signal  and the other is an 18' Stop only and both have the wider dimension for 12' above rail level 

But I guess this may be one of those things where the draftsman's assumption and reality may be different !

Oh and I forgot to add the short answer is 6 1/2 inches diameter for the first 12 feet from rail level followed by 5 1/2 inches diameter. Spindle 12 inches below base of finial. There are loads of other dimensions in the article

Dear Junctionmad

Issue 47 of the Great Western Railway Journal has an article with drawings on GWR tubular signals. A quick scan before sending this looks like it will have what you want