If you register, you can do a lot more. And become an active part of our growing community. You'll have access to hidden forums, and enjoy the ability of replying and starting conversations.

71000

Discussion in 'Steam Traction' started by jane, Feb 20, 2011.

Page 3 of 8
  1. std tank

    std tank Part of the furniture

    Joined:
    Sep 20, 2005
    Messages:
    3,927
    Likes Received:
    1,070
    Gender:
    Male
    Occupation:
    Retired
    Location:
    Liverpool
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    On Standard locos the regulator does not have to be open to ensure cylinder lubrication. Steam is supplied to the oil atomisers via the cylinder cock actuating valve. Obviously, a reasonable steam pressure is required.
     
    std tank, Mar 7, 2011
    #41
  2. Sheff

    Sheff Resident of Nat Pres

    Joined:
    Apr 21, 2006
    Messages:
    8,059
    Likes Received:
    3,138
    Gender:
    Male
    Occupation:
    Retired Engineer & Heritage Volunteer
    Location:
    N Warks
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    Surely unless you take the con rods down she must be in steam for lubrication purposes.
     
    Sheff, Mar 7, 2011
    #42
  3. std tank

    std tank Part of the furniture

    Joined:
    Sep 20, 2005
    Messages:
    3,927
    Likes Received:
    1,070
    Gender:
    Male
    Occupation:
    Retired
    Location:
    Liverpool
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    Sheff, I did say that a reasonable steam pressure is required to operate the atomisers, i.e. the loco is in steam.
     
    std tank, Mar 7, 2011
    #43
  4. Sheff

    Sheff Resident of Nat Pres

    Joined:
    Apr 21, 2006
    Messages:
    8,059
    Likes Received:
    3,138
    Gender:
    Male
    Occupation:
    Retired Engineer & Heritage Volunteer
    Location:
    N Warks
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    Simultaneous posts STD Tank check the times :)
    I could have quoted the OP but it gets a but tiresome reading the same posts over and over.
     
    Sheff, Mar 7, 2011
    #44
  5. RalphW

    RalphW Nat Pres stalwart Staff Member Administrator Friend

    Joined:
    Sep 11, 2005
    Messages:
    36,449
    Likes Received:
    9,908
    Gender:
    Male
    Occupation:
    Retired-ish, Part time rail tour steward.
    Location:
    Northwich
    Heritage Railway Volunteer:
    No I do not currently volunteer
    OK my mistake, you do not need steam on to ensure lubrication, but my video on post 24, when 71000 comes under the far bridge, it is obvious from the visable exhaust that the regulator is more than just cracked open.
     
    RalphW, Mar 7, 2011
    #45
  6. std tank

    std tank Part of the furniture

    Joined:
    Sep 20, 2005
    Messages:
    3,927
    Likes Received:
    1,070
    Gender:
    Male
    Occupation:
    Retired
    Location:
    Liverpool
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    My apologies Sheff.
     
    std tank, Mar 7, 2011
    #46
  7. alisdairanderson

    alisdairanderson New Member

    Joined:
    Mar 8, 2010
    Messages:
    57
    Likes Received:
    1
    alisdairanderson, Mar 7, 2011
    #47
  8. Tim Fenton

    Tim Fenton New Member

    Joined:
    Nov 15, 2010
    Messages:
    90
    Likes Received:
    0
    Location:
    Crewe
    Tim Fenton, Mar 7, 2011
    #48
  9. Rick.E

    Rick.E Member

    Joined:
    Feb 23, 2009
    Messages:
    479
    Likes Received:
    84
    Gender:
    Male
    Occupation:
    RETIRED
    Location:
    WARWICKSHIRE
    Heritage Railway Volunteer:
    No I do not currently volunteer
    Rick.E, Mar 7, 2011
    #49
  10. irwellsteam

    irwellsteam Member

    Joined:
    Jan 5, 2011
    Messages:
    796
    Likes Received:
    176
    Occupation:
    -
    Location:
    -
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    Why did she even have to be in steam if she's being towed by a diesel?
     
    irwellsteam, Mar 7, 2011
    #50
  11. Oakfield

    Oakfield Guest

    See post #42 (and previous) above
     
    Oakfield, Mar 7, 2011
    #51
  12. irwellsteam

    irwellsteam Member

    Joined:
    Jan 5, 2011
    Messages:
    796
    Likes Received:
    176
    Occupation:
    -
    Location:
    -
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    but surely steamers can be towed without needing lubing up on the move ?? What about when Mallard went to Shildon or when Blackmore Vale was towed around the Bluebell by Sir Archie?
     
    irwellsteam, Mar 7, 2011
    #52
  13. std tank

    std tank Part of the furniture

    Joined:
    Sep 20, 2005
    Messages:
    3,927
    Likes Received:
    1,070
    Gender:
    Male
    Occupation:
    Retired
    Location:
    Liverpool
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    Mallard had its connecting rods taken off and crossheads secured.
     
    std tank, Mar 7, 2011
    #53
  14. RalphW

    RalphW Nat Pres stalwart Staff Member Administrator Friend

    Joined:
    Sep 11, 2005
    Messages:
    36,449
    Likes Received:
    9,908
    Gender:
    Male
    Occupation:
    Retired-ish, Part time rail tour steward.
    Location:
    Northwich
    Heritage Railway Volunteer:
    No I do not currently volunteer
    Having steam pressure on is the only way to ensure oil is fed to the cylinders, you cannot run the cylinders without constant feed, unless as Std Tank says the connecting rods are off, even then I'm sure there would be a fairly severe speed restriction. So it's just not practicable.
     
    RalphW, Mar 7, 2011
    #54
  15. odc

    odc Member

    Joined:
    Apr 11, 2006
    Messages:
    765
    Likes Received:
    35
    Occupation:
    Network Technician at St Albans School
    Location:
    Hemel Hempstead
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    OK, this has puzzled me for a while. If your loco has a mechanical lubricator, why is steam still needed. I understand the oil will not be atomised but it will still be there. Is it a temperature thing?

    Someone please explain this, for my better understanding and our mutual improvement......
     
    odc, Mar 8, 2011
    #55
  16. std tank

    std tank Part of the furniture

    Joined:
    Sep 20, 2005
    Messages:
    3,927
    Likes Received:
    1,070
    Gender:
    Male
    Occupation:
    Retired
    Location:
    Liverpool
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    Firstly, cylinder oil is more like treacle than oil. It is actually heated up in the lubricator by the use of a pipe coil through which steam is passed. This makes the oil more pliable (if that's the right word). It is then pumped to the atomisers. Steam is then used to atomise the oil, so that when it enters the cylinders and valve chests there is an even spread of oil obtained. Non return valves are fitted to the atomisers, because you also have steam under pressure in the cylinders which would attempt to escape into the lubrication system. I think I've got that right. Anyone like to add to it.?
     
    std tank, Mar 8, 2011
    #56
  17. RalphW

    RalphW Nat Pres stalwart Staff Member Administrator Friend

    Joined:
    Sep 11, 2005
    Messages:
    36,449
    Likes Received:
    9,908
    Gender:
    Male
    Occupation:
    Retired-ish, Part time rail tour steward.
    Location:
    Northwich
    Heritage Railway Volunteer:
    No I do not currently volunteer
    I think that's about it, there are variations as some loco's would need to have the regulator open a bit to ensure there is steam to carry the oil to the valves and pistons. Just loking at the drivers manual for Sentinel steam waggons, it stresses, when descending long hills 'the driver must ensure that he regularly presses the accelerator pedal (open the regulator) for short periods so that oil will be fed to the cylinders and valves'.
     
    RalphW, Mar 8, 2011
    #57
  18. 32110

    32110 Member

    Joined:
    May 20, 2006
    Messages:
    649
    Likes Received:
    794
    Gender:
    Male
    Occupation:
    Retired from full time paid work
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    On a loco fitted with sight feed lubricator then steam supply would be essential. Removing connecting rods and securing crossheads would be OK for pistons but balance would then be upset. Valve gear also needs to be thought of. So if possible, much easier to move in steam.
     
    32110, Mar 8, 2011
    #58
  19. buseng

    buseng Part of the furniture

    Joined:
    Sep 9, 2005
    Messages:
    4,801
    Likes Received:
    349
    Gender:
    Male
    Occupation:
    Retired
    Location:
    Tilehurst, Reading, Berks.
    I think this is particularly so with ex GW locos.

    Edit, just read 32110's post above which says virtually the same thing.
     
    buseng, Mar 8, 2011
    #59
  20. odc

    odc Member

    Joined:
    Apr 11, 2006
    Messages:
    765
    Likes Received:
    35
    Occupation:
    Network Technician at St Albans School
    Location:
    Hemel Hempstead
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    I do understand the viscosity of steam oil changes as it heats up and the neceserty to have steam with hydrostatic lubrication but still does the oil have to be atomised. Does it not provide enough protection for short distances. As well as a fireman on the FR I operate many miniture locos that have mechanical cylinder lub with no heating coil or atomisers fitted. The pump just pumps through a clack into the steam line to the valves.
     
    odc, Mar 9, 2011
    #60
Page 3 of 8

Share This Page