New 0n30 Donkey engine

Discussion in 'Logging, Mining and Industrial Railroads' started by shamus, Sep 15, 2003.

  1. shamus

    shamus Registered Member

    Here's the latest 0n30 Donkey to be scratchbuilt, the guy on the left just happened along to the workshops to cheer up the lads by playing his Harmonica.


  2. billk

    billk Active Member

    Hmmm - I've seen a picture of that guy somewhere before.
  3. jon-monon

    jon-monon Active Member

    Neat! What detail!
  4. grlakeslogger

    grlakeslogger Member

    The donkey looks terrific !!! Did you work from a plan on this one, or is it a freelanced model? I've only done a couple of donkeys, and those were about decade ago. My best was okay, but not great. How about some insight, Shamus, on where to get good parts (I'm in HO), where to get good plans, and some general philosophy on construction and methods. I expect a few of us would appreciate the pointers. --Stu--
  5. shamus

    shamus Registered Member

    Hi grlakeslogger

    Here my HO version using an old 303 cartdridge.

    I was given an old 303 cartridge shell casing to make a Donkey Engine boiler from, It turned out fine for
    making the boiler, after a little fabrication with various brass parts from my scrap box, here is how it
    turned out.
    The next part of the operation was to make the skid for it to travel about on and also the water tank fitted at
    the rear. The water tank started life as a brass tube 5/8" diameter.
    The next project was to make a convincing gearbox. As I had an old set of small gears from a clock,
    I set about making the shell casing for it, out of brass sheet. Next, Inserting the gears so they would
    actually mesh properly, and adding the outside discs for the pistons.
    How to fabricate some sort of realistic looking pistons was next on the agenda . The only thing I could think
    of was two pieces of brass tubing one to fit inside the other. The end pieces which fitted into the boiler
    were in actual fact two plastic bits from on old shay kit. The outside brass tubing was cut away
    with a round file, making the slots.
    I then fitted the pistons to the boiler.
    Then the whole assembly was fitted together.
    The whole assembly was then fitted to the skid.
    Next stage was to make the wood frame to house the roof, this was made using 1/16" square hardwood,
    the four corner pieces were reinforced with 1/32" by 1/16" hardwood on the outside,
    This was test fitted, and as I required the Donkey engine to have a jib on the front, to be able to unload logs,
    I made the jib using 1/16" by 1/8" hardwood, and braced it every 1/2".
    Once this was made, the roof was added using corrugated plastic sheet. A hole was cut for the boiler to fit
    into and a flap was also added.
    Now it could all be fitted together, and the whistle added on the boiler. The model was suitably painted, but
    as yet it is not weathered.
    Here she is in place at the log pond, just about to unload a giant redwood.

  6. Ray Marinaccio

    Ray Marinaccio Active Member

    Pretty neat . How hard would it be to make it actually work? ( with a hidden electric motor) Imagin a working cable system to b ring logs to the siding and load the cars. Just a crazy thought.
  7. grlakeslogger

    grlakeslogger Member

    Thank you, Shamus.

    Many thanks for the outstanding tutorial. Just a couple of quick questions remain:

    1. About what diameter are the clock gears you used?
    2. What is the diameter of the tubing you used for cylinders?

    You make it look so very easy!

  8. Matthyro

    Matthyro Will always be re-membered

    Very impressive Paul. Including yourself with your musical talent is amazing. I know we have heard the sounds elsewhere but can imagine either soothing music to settle down the LPBs or bouncy tunes to get them working faster.
    Beautiful workmanship
  9. Lighthorseman

    Lighthorseman Active Member

    Thumbs Up!

    Beautiful work, usual! :)
  10. jwmurrayjr

    jwmurrayjr Member

    Wonderful stuff!

    Love the harmonica.

    Thanks for the look,
  11. shamus

    shamus Registered Member

    Re: Thank you, Shamus.

    Thanks again to everyone.

    The gears were around 3/8" diameter, and the tube for the pistons was 1/8" diameter.

  12. philip

    philip Guest

    Man what a scene. Who be the blues man playin that harp?:thumb:

  13. Tad

    Tad Member

  14. Drew Toner

    Drew Toner Member


    Very nice, as usual Paul .

    I swear that that On30 donkey could really work! Put a little crank handle on it and actually lift logs. That large scale is really nice!

    Whats next Paul, G?


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