الأنشطة الأخيرة الخاصة بـ MellishR
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أعجب MellishR بمشاركة Steve' في موضوع V2 4771 Green Arrow to return?.
It would be interesting to see the income and expenditure cost of operating Scotsman. However, if the hire figures I’ve seen are correct then it should be cash positive at the end of its current ticket. Whether that money is put back into...
5 جوان 2026 في 2:02 مساءاً -
أعجب MellishR بمشاركة 242A1' في موضوع V2 4771 Green Arrow to return?.
The fact that the overhaul of Flying Scotsman had to be undertaken twice is no fault of the engine. The people that are and were involved is another matter. Sir Nigel Gresley underwent an overhaul from 2015 and returned in April 2022. This is...
5 جوان 2026 في 2:00 مساءاً -
أعجب MellishR بمشاركة Bikermike' في موضوع V2 4771 Green Arrow to return?.
In real terms, I suspect the full cost of the rebuild, nevermind the overrun will cost you around a penny (depending on your definitions of "cost" and "us"). If you've watched FS go through at full welly anywhere, I would submit you have had a...
4 جوان 2026 في 11:49 صباحاً -
أعجب MellishR بمشاركة Jamessquared' في موضوع SVR General Discussion.
The Bluebell is indeed going down that route. My understanding is that a CCBS is a comparatively recent legal entity; Railways that set their structure 10+ years ago didn't have it as an option. It was explained at a recent-ish Bluebell meeting...
4 جوان 2026 في 7:42 صباحاً -
أعجب MellishR بمشاركة Sheff' في موضوع 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...
1 جوان 2026 في 8:16 مساءاً -
أعجب MellishR بمشاركة GW 5972' في موضوع 6024 King Edward 1.
I’m not going to comment on the cause of the squeak in case it leads to another forty posts!!!
1 جوان 2026 في 8:15 مساءاً -
أعجب MellishR بمشاركة Wenlock' في موضوع 6024 King Edward 1.
It is labelled both Air Pump and Vacuum Pump. I suppose it could be called the "Vacuum Maintaing Air Pump" :) But what really matters is, why does it squeak? Is that a fault, or is it an indication of a good seal around the piston?
1 جوان 2026 في 8:15 مساءاً -
أعجب MellishR بمشاركة Jamessquared' في موضوع 6024 King Edward 1.
Yes, but we’d also put a liquid nitrogen trap in the circuit between pump and vacuum line to prevent the pump oil absorbing volatiles and reducing the efficiency, and I’d like to see the Swindon drawing for that! Tom
1 جوان 2026 في 8:15 مساءاً -
أعجب MellishR بمشاركة 26D_M' في موضوع 6024 King Edward 1.
To be further pedantic, the "pump" maintains the vacuum, created by a steam ejector, once on the move ....
1 جوان 2026 في 8:13 مساءاً
