HOn30 tank loco

Discussion in 'Scratchin' & Bashin'' started by Ray Marinaccio, Jul 20, 2006.

  1. Ray Marinaccio

    Ray Marinaccio Active Member

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    Here are a few construction photos of the HOn30 tank loco I'm bashing from brass on a Bachmann Dockside chassis.
    The chassis was stripped down to basically just the frame rails.
    The axle bearing slots were enlarged so brass bushings could be installed and a larger motor installed.
    [​IMG]
  2. Ray Marinaccio

    Ray Marinaccio Active Member

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    I built the cylinder block assembly next.
    The cylinders are pieces of 1/4" brass tube with end caps soldered on.
    The cross head guides are gold plated brass bars from an electrical connector on a PC board.
    A piece of 1/4" wide channel, notched to fit over the frame and the 2 brass frame extensions is soldered between the cylinders.
    The pilot beam was then soldered to the frame extensions and 1/4" square plates soldered above the valve chambers.
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  3. Ray Marinaccio

    Ray Marinaccio Active Member

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    The boiler was built up from a piece of 3/8" dia. brass tube with the next size smaller tube soldered inside for the smoke box. Cut outs for the worm and motor shaft were milled out.
    The smoke box wrapper, smoke box front and the top of the boiler saddle are .005 brass sheet with rivets embossed one at a time.
    The boiler saddle bottom was cut from 1/4" square brass tube.

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  4. Ray Marinaccio

    Ray Marinaccio Active Member

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    The cab walls are .015" brass sheet.
    The windows, rear door and opening for the boiler were cut on the milling machine.

    [​IMG]
  5. Ray Marinaccio

    Ray Marinaccio Active Member

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    The tanks are .005" brass sheet embossed with rivets and soldered over a 1/4"brass channel as a frame.
    The rivets were embossed in the cab walls, soldered together, then soldered to the boiler.
    The cab roof was formed from .015" brass sheet and soldered in place.
    The tanks were then soldered to the locomotive.

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  6. cnw1961

    cnw1961 Member

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    Ray, a small loco, but a great piece of work. Is there a prototype you use as a sample for your model?
  7. jim currie

    jim currie Active Member

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    great little critter Ray :)
  8. shaygetz

    shaygetz Active Member

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    Dude...you got way too many tools:D

    Sweet work.:thumb:
  9. MilesWestern

    MilesWestern Active Member

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    jawdrop WOW! Can you still find the bachmann dockside chassis anymore? That's really cool! I can't wait to see the finished product (or just even what detail parts you'll add!) Great job! :thumb:
  10. Ray Marinaccio

    Ray Marinaccio Active Member

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    Thanks everyone.
    This model is based loosely on a loco used in the Philippines on sugar plantations.

    Domes were made of solid brass on the Lathe and 1/16 square tube was soldered to the bottoms of the side cab walls for strength.

    A cab support/rear pilot was made from 1/8" square brass tube and a couple pieces of brass angle.

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  11. Ray Marinaccio

    Ray Marinaccio Active Member

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    I also added another pilot beam to the front.

    [​IMG]

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  12. Chessie6459

    Chessie6459 Gauge Oldtimer

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    Looks Great Ray.:thumb: :thumb: :thumb:
  13. Ray Marinaccio

    Ray Marinaccio Active Member

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    I built this smoke stack with spark arrester today.
    It has a total of 6 pieces, I still need to add the ash discharge tube and the bottom flange.

    [​IMG]
  14. shaygetz

    shaygetz Active Member

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    I'm assuming that your little pufferbilly in the background is poppin' a wheelie in anticipation?:D

    Love that onion bulb stack.:thumb:
  15. jim currie

    jim currie Active Member

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    nice stack Ray :) what do you use to make the rivets ?
  16. Chessie6459

    Chessie6459 Gauge Oldtimer

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    Nice Stack Ray.:thumb:
  17. doctorwayne

    doctorwayne Active Member

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    Nice work, Ray, on not just the stack, but the entire locomotive. I'm looking forward to seeing the finished product.

    Wayne
  18. Ray Marinaccio

    Ray Marinaccio Active Member

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    Thanks guys.
    Jim, I am using a home made embossing tool to make the rivets. The stack is made up of a total of 8 parts.
    The bulb was a brass bead I found in the junk box. The flares with the rivets were the hard parts to make.
    I cut out 2 washer from .005" brass, embossed the rivets, then formed the taper by pressing them onto a tubing flaring tool.
    The lower portion of the stack is made from 2 pieces of tubing and a small ring of tubing completes the top.
    I fit all the pieces together and held them together with a bolt and nut.
    Once I got all the parts lined up I soldered them.
    The ash discharge tube and bottom flange were soldered on after the stack was mounted on the locomotive.
    Bob, adding the stack actually balanced the locomotive. With such a short wheelbase the loco's center of gravity will be critical.
    It weighs in at close to 2 Ozs. already and I plan to fill the boiler and tanks with lead. Goin' to have to re enforce the trestles.

    [​IMG]

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  19. Ray Marinaccio

    Ray Marinaccio Active Member

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    I've been working on the cross heads and side rods.
    The cross heads are made from a piece of square tube, .010" brass plate and a piece of .030" brass rod.
    The side rods are formed steel wire, soldered then filed to shape.
    The main rods are cut and filed from .010" brass.
    I also narrowed the drivers by .025" to give more clearance for the crank pins.

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  20. shaygetz

    shaygetz Active Member

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    Oh, to have a Unimat...sigh:thumb: