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Lyd

Discussion in 'Narrow Gauge Railways' started by SpudUk, Mar 18, 2009.

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  1. SpudUk

    SpudUk Well-Known Member

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    Thanks Roger! Very much appreciated!!
     
    SpudUk, May 26, 2009
    #21
  2. meeee

    meeee Member

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    I believe it was due to a conflict of interests, the event was sponsored by railway magazine but the transport of lyd was sponsored by steam railway.

    Tim
     
    meeee, May 27, 2009
    #22
  3. SillyBilly

    SillyBilly Member

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    SillyBilly, May 27, 2009
    #23
  4. pjm

    pjm New Member

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    They look like backhead injectors to me, very good for working up long hills as they create less pressure drop.
     
    pjm, May 27, 2009
    #24
  5. SillyBilly

    SillyBilly Member

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    If they're the injectors then given the size of the boiler surely they aren't very big?
     
    SillyBilly, May 27, 2009
    #25
  6. Steve

    Steve Resident of Nat Pres Friend

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    I don't think that they are the injectors...........
     
    Steve, May 27, 2009
    #26
  7. Roger Dimmick

    Roger Dimmick Member

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    Try Boiler Feed Clacks...

    ...as seen here and here when newly-machined in November 2008...
     
    Roger Dimmick, May 27, 2009
    #27
  8. SillyBilly

    SillyBilly Member

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    Neither do I which is why I questioned pjm's guess, there appears to be two valves on there, my dad guessed this was the steam valve in there also
     
    SillyBilly, May 27, 2009
    #28
  9. Steve

    Steve Resident of Nat Pres Friend

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    Out of interest, are these an FR design and presumably a standard on that railway? They don't have the look of Gresham & Craven or Davies & Metcalfe ones.
     
    Steve, May 27, 2009
    #29
  10. Steve

    Steve Resident of Nat Pres Friend

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    Please explain? I'm intrigued!
     
    Steve, May 27, 2009
    #30
  11. pjm

    pjm New Member

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    They create less pressure drop as you are putting the cold water from the injector onto the warmest part of the boiler eg the firebox so will be warmed the fastest so less pressure drop \:D/

    This is done on MRL740 that climbed a 12 mile 1 in 20 for a living.

    If it is a clack valve I am not sure what the second valve is for unless it is the steam feed for the injector which I would find odd :-k
     
    pjm, May 27, 2009
    #31
  12. SillyBilly

    SillyBilly Member

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    I'm fairly certain these are not standard FR components, James Evans the man who began the Lyd project has done the drawings for the FRCo. as can be seen in the backgroud of the photo, whether or not it is his design?
     
    SillyBilly, May 27, 2009
    #32
  13. Roger Dimmick

    Roger Dimmick Member

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    Wrong person to ask - as I just take photos... 8-[

    However, the drawings are labelled FRCo and drawn by James Armstrong Evans in 2005... :-k

    So that would probably mean that they're not standard FR, Gresham & Craven or Davies & Metcalfe - but part of the modifications incorporated in James' overall design... [-o<
     
    Roger Dimmick, May 27, 2009
    #33
  14. gz3xzf

    gz3xzf Member

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    They look like they are combined injector steam valve and clack as used on LNER locomotives, the second valve spindle is the clack shut-off. (See photo this photograph of Tornado's backhead here.)
     
    gz3xzf, May 27, 2009
    #34
  15. Steve

    Steve Resident of Nat Pres Friend

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    Combined steam feed and clack was a fairly common arrangement, along with a separate injector. it was used on the Austerity/J94 locos and some LNER ones. K1/K4/B1/A1/A4 etc spring to mind. There must have been many more both main line and non-main line.
     
    Steve, May 27, 2009
    #35
  16. Steve

    Steve Resident of Nat Pres Friend

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    Temperature and pressure drop are not the same thing. Sorry, but unless you can come up with a better explanation, you're talking rubbish.
     
    Steve, May 27, 2009
    #36
  17. Kerosene Castle

    Kerosene Castle Well-Known Member

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    If it's any help, the original engines had Gresham & Craven No.5's. I get the feeling the ones in the photo are 'along the right lines' rather than a direct copy, though as I can't recall seeing a pukka one, I guess I can't really comment!
     
    Kerosene Castle, May 28, 2009
    #37
  18. SpudUk

    SpudUk Well-Known Member

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    If I knew half of the stuff you guys were talking about I'd be happy...I still think she is a beast though!

    And as an initial word of warming you pressure drop people...play nicely!
     
    SpudUk, May 28, 2009
    #38
  19. pjm

    pjm New Member

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    Pressure is created by the fast movement of water molecules, so the introduction of slower moving water will slow the movement and reduce pressure. Well I assure that is what they told me a UNI. in thermodynamics. This is all assuming you are doing this on load with a great enough energy supply in the fire box.
     
    pjm, May 28, 2009
    #39
  20. SpudUk

    SpudUk Well-Known Member

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    Read in heritage railway today that they are aiming to finish her very soon, and that her first outing will be to Launceton, then the L&B!

    Woop
     
    SpudUk, Jul 13, 2009
    #40
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