ATSF 2-10-4 Class 5000 Madame Queen

alister Jun 16, 2021

  1. BigJake

    BigJake TrainBoard Member

    3,259
    6,173
    70
    Ok, I get that you're not there yet.

    But I don't know why there would be any drive wheels with apparently very little counterweight, on any steam locomotive (except Climax, Shay, etc.). Then again, scale models probably don't need driver counterweights much anyway, except for appearance.
     
  2. acptulsa

    acptulsa TrainBoard Member

    3,344
    5,868
    75
    Actually each of those represents quite a bit of lead.
    The main driver got more partly because the rods that connected it to two other axles were twice as stout, and mainly because the main bore the brunt of the piston thrust.
     
    badlandnp likes this.
  3. badlandnp

    badlandnp TrainBoard Member

    4,587
    16,153
    90
    Smooth and reliable is the first priority. Smooooooth! It is proving to be an interesting build.
     
    DeaconKC likes this.
  4. alister

    alister TrainBoard Member

    733
    1,196
    37
    I spent some time cutting up the weight. I need to mill it down a fair bit - it's looking a bit Avant Garde :)
    [​IMG]
     

    Attached Files:

    BarstowRick, Kurt Moose and badlandnp like this.
  5. alister

    alister TrainBoard Member

    733
    1,196
    37
    I've trimmed up the weight a bit - still looks odd. I've swapped out the spectrum motor and put in the replacement one to allow the weight to be lower.

    [​IMG]
     

    Attached Files:

    eposte12, BarstowRick and badlandnp like this.
  6. alister

    alister TrainBoard Member

    733
    1,196
    37
    Just to check proportions which are a little off and this shell is not Madame Queen.

    [​IMG]
     

    Attached Files:

    BarstowRick and badlandnp like this.
  7. alister

    alister TrainBoard Member

    733
    1,196
    37
    I've chopped the front as the whole thing still offends me!! So I'll make some major modifications to the mechanism to get it flatter and more in proportion.
    Using a Concor Heavy 2-10-2 would be more straight forward but I am having fun with this.

    Picture 1 below shows the chop
    [​IMG]

    Picture 2 below shows the height difference between the J based mechanism and the Northern based mechanism.

    [​IMG]
     

    Attached Files:

    BarstowRick, Moose2013 and badlandnp like this.
  8. drasko

    drasko TrainBoard Member

    284
    47
    21
    Start with a concor 2-10-2 mech. The drivers actually scale out to 69-70" and are spoked which is perfect for the madame queen.

    Drasko
     

    Attached Files:

    BoxcabE50, badlandnp and alister like this.
  9. alister

    alister TrainBoard Member

    733
    1,196
    37
    Yes I have come to the fast conclusion that is a better option. I just had some J's lying around and I thought I'd see how far I could get. Your model looks awesome!!
     
  10. alister

    alister TrainBoard Member

    733
    1,196
    37
    Hi Adam,
    You are absolutely right, I take my hat off to you. The Con-Cor 2-10-2 Heavy is the perfect starting point for Madam Queen - I even measured out the driver wheelbase. I won't be using the J Class mechanism for this build, I'll find another use for it.
    Much obliged.
     
    DeaconKC, Moose2013 and badlandnp like this.
  11. alister

    alister TrainBoard Member

    733
    1,196
    37
    So here's the start of something interesting, I am using my Concor 2-10-2 for Madame Queen. This simplifies the mechanism somewhat. I just need a front pilot truck off a Kanawha or Berkshire, a rear Delta truck and that is about there. I'll use an atsfnscalemodels tender behind the loco. I need to get another K&S Brass tube so I can make the intermediate boiler section. I have the front and rear tubes but not the middle.

    [​IMG]

    [​IMG]
     

    Attached Files:

  12. alister

    alister TrainBoard Member

    733
    1,196
    37
    I'm trying to source K&S Brass tube 5/8 inch diameter for the intermediate boiler section within NZ. Overseas orders are taking up to 5 weeks to arrive from the US. I have the front section (19/32) and rear section (21/32). Unfortunately most of the stockists are in Auckland under lockdown. It might take a while to get the boiler formed.
     
  13. M&E Alco

    M&E Alco TrainBoard Member

    145
    237
    23
    Hi Al
    I thought I had what you need, but it's 0.656" (16.7mm) or 21/32. I was in Acorn Models in Christchurch just prior to Level 4 Lockdown and they may have what you're looking for. Under Level 2 they should be able to help. E-mail sales@acornmodels.co.nz or check out www.acornmodels.co.nz.

    All going well, we may once again be Covid free soon.
    Cheers
    Steve
     
  14. alister

    alister TrainBoard Member

    733
    1,196
    37
    Hi Steve,
    I had a look at Acorn Models but they don't have the size I need, I have found a shop in level 2, hangerone, so will order from them. I also found one on Trade Me from a place in Auckland but they haven't responded to my question. I probably should have the tube this coming week. Thanks for your help.

    Alister
     
  15. alister

    alister TrainBoard Member

    733
    1,196
    37
    Well this is embarrassing, I already have a 5/8" pipe, just found it in my box of steam scratchbuilding box, I already looked in there so many times! Well that means I can rough out the boiler! Yay!!
     
    badlandnp and M&E Alco like this.
  16. alister

    alister TrainBoard Member

    733
    1,196
    37
    The J 4-8-4 wheels will be used in a 2-6-6-2 Prairie Mallet. There's always a silver lining. :D
     
    badlandnp likes this.
  17. alister

    alister TrainBoard Member

    733
    1,196
    37
    Well two years on and I no longer have to scratch build the boiler, a 3D printed shell is winging it's way to NZ made by Adam (Drasko). It looks awesome, can't wait to get my hands on it :)
     
  18. alister

    alister TrainBoard Member

    733
    1,196
    37
    Well it's arrived so I need to get moving on it
    [​IMG]
     

    Attached Files:

    SP-Wolf, MK, badlandnp and 4 others like this.
  19. alister

    alister TrainBoard Member

    733
    1,196
    37
    Here's the ATSF 20K tender - assembled by Dirk (atsfnscalemodels)

    [​IMG]
     

    Attached Files:

    DeaconKC, eposte12, badlandnp and 2 others like this.
  20. alister

    alister TrainBoard Member

    733
    1,196
    37
    Oops, this tender isn't quite right for Madame Queen so it'll go back behind a Hudson. I'll get to the tender after the shell is done :)
     
    DeaconKC and badlandnp like this.

Share This Page