Sheff's Recent Activity
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Sheff replied to the thread 6024 King Edward 1.
I was an engineer in the chemical industry all my working life and firstly for our sins they were always referred to as vacuum pumps, be they recip, liquid ring or whatever. However, in design and specification, we always used absolute pressure...
Jun 1, 2026 at 12:19 PM -
Sheff liked GW 5972's post in the thread 6024 King Edward 1.
Well, you get the idea, must be there now.
Jun 1, 2026 at 11:39 AM -
Sheff liked gios's post in the thread 82045 The way ahead?.
May update now live: http://www.82045.org.uk/news/82045_news-may26.html
Jun 1, 2026 at 7:35 AM -
Sheff replied to the thread 6024 King Edward 1.
Err so that’s 39 now …. sorry 38 …. ;)
Jun 1, 2026 at 7:32 AM -
Sheff liked Jimc's post in the thread 6024 King Edward 1.
Well, strictly its both isn't it. Its a mechanisam that pumps air in order to create a vacuum. But to call it an air pump outside the strictly technical arena would invite confusion with pumps intended to produce compressed air eg Westinghouse.
May 31, 2026 at 7:13 PM -
Sheff liked Jamessquared's post in the thread 6024 King Edward 1.
Interestingly I looked up the section on brakes in the Black Book. The text refers to a "vacuum pump" and there is a figure caption to a drawing in which the caption is labelled "vacuum pump" (agreeing with the text) but in which the component in...
May 31, 2026 at 7:13 PM
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Sheff liked torgormaig's post in the thread 6024 King Edward 1.
So is it a vacuum pump, or is it an air pump? Is it a railway station or is it a train station? In both situations we all know what people are talking about and as far as I can see both terms are correct in their respective situations. On the...
May 31, 2026 at 4:52 PM -
Sheff liked Steve's post in the thread 6024 King Edward 1.
Being pedantic, it is an air pump as that is what is being pumped and that is how it is referred to. You can't pump a vacuum. :)
May 31, 2026 at 4:46 PM -
Sheff liked staffordian's post in the thread Churnet Valley Railway General Discussion.
I was a passenger on today's Borders Explorer day and would just like to highlight what a superb day it was We travelled the entire line including the short stretch towards Stoke, the new extension to the temporary Leek platform, and were...
May 31, 2026 at 7:01 AM -
Sheff liked Kirk Oswald's post in the thread North Yorkshire Moors Railway General Discussion.
The temporary replacement footbridge has been opened today. Very impressive speed not always common with a local authority.
May 30, 2026 at 10:30 PM -
Sheff replied to the thread North Yorkshire Moors Railway General Discussion.
What sort of time period would this have been?
May 30, 2026 at 6:24 PM -
Sheff replied to the thread North Yorkshire Moors Railway General Discussion.
Hands up - I lazily Googled it without a thorough fact check, which I should have done as I also raised an eyebrow.
May 29, 2026 at 6:58 AM -
Sheff replied to the thread North Yorkshire Moors Railway General Discussion.
SR V "Schools" Class LNER Class D49 ("Shires" / "Hunts") Total Built 40 vs 76 Boiler Pressure 220 psi vs 180 psi Tractive Effort 25,130 lbf vs 21,556 lbf Loco Weight 67.10 vs 65.11 long tons Axle Load 21.0 vs 17.8 long tons BR Power Rating 5P vs 4P
May 28, 2026 at 10:36 PM -
Sheff liked Steve's post in the thread North Yorkshire Moors Railway General Discussion.
Given good rail conditions, Repton will drag 7 up the hill to Goathland in both directions. However, any reduction in adhesive ratio becomes a problem. In theory, you need 13,538 lbf darawbar pull to drag 7 full coaches up the 1 in 49 and 6,648...
May 28, 2026 at 6:56 PM -
Sheff liked pmh_74's post in the thread North Yorkshire Moors Railway General Discussion.
Do you mean 'Americanization'?
May 28, 2026 at 6:53 PM
