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MellishRs letzte Aktivitäten

  1. MellishR gefällt Steves Beitrag in dem Thema 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 Juni 2026 um 14:02

  2. MellishR gefällt 242A1s Beitrag in dem Thema 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 Juni 2026 um 14:00

  3. MellishR gefällt Bikermikes Beitrag in dem Thema 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 Juni 2026 um 11:49

  4. MellishR gefällt Jamessquareds Beitrag in dem Thema 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 Juni 2026 um 07:42

  5. MellishR gefällt Sheffs Beitrag in dem Thema 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 Juni 2026 um 20:16

  6. MellishR gefällt GW 5972s Beitrag in dem Thema 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 Juni 2026 um 20:15

  7. MellishR gefällt Wenlocks Beitrag in dem Thema 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 Juni 2026 um 20:15

  8. MellishR gefällt Jamessquareds Beitrag in dem Thema 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 Juni 2026 um 20:15

  9. MellishR gefällt 26D_Ms Beitrag in dem Thema 6024 King Edward 1.

    To be further pedantic, the "pump" maintains the vacuum, created by a steam ejector, once on the move ....

    1 Juni 2026 um 20:13
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