Athearn RTR AC4400

Discussion in 'HO Scale Model Trains' started by philip, Mar 4, 2004.

  1. philip

    philip Guest

    How to make it really pull. Add these weights.

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  2. philip

    philip Guest

    Installed with Goo. No modification required.

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  3. philip

    philip Guest

    Each weight is 1&1/2oz. This engine will now pull 5 cars per truck axel. 30 cars total. Modified three of these loco's and will pull 86 coal cars .....no problem 2% grade. I made the weights out of lead. The problem was to make the weight encompass the drive shaft. Anyhow the center of gravity is low and they work. No more slipping!:)

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  4. Fred_M

    Fred_M Guest

    Thanks for the how to and also the innards of an Athearns RTR which I have never seen before. After your work it looks kinda like a blue box super with a NWSL can motor. How did you cast the lead though? FRED:thumb:
  5. philip

    philip Guest

    Big Dave

    Big Dave weights were cast in my little shop in my basement. I started with a block of foam and formed the shape of the weight. Then dry test fit the foam for clearance. The actual mold is dow corning HS II. Once the rubber cured I heated the lead with my big soldering iron and poured it in the mold. I also use my coleman stove out side if I'm casting 100% lead. This stuff is 50 tin and 50 lead so only 1/2 the risk of cancer:rolleyes:

    Oh yeah, big dave was the brainchild of this project. He says hey phil can you make this thing pull better. I say yes he's 6-9" and a mountain of a man....so i foundly call the weights big Dave. ouch quit twisting my arm Dave.

    And i might add these Athearn are whisper quiet as advertised and will now hang with the stock Kato. Same weight.

    philip
  6. cidchase

    cidchase Active Member

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    phillip, that is very slick!!
    Thanx for the method and the ideas!!:)
  7. shaygetz

    shaygetz Active Member

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    Too cool...even if it is CSX;) :p
  8. philip

    philip Guest

    CSX

    :D :D :D :D :D I hear ya!:D :D :D :D :D

    I'm partial to the older stuff. AC4400 what a beast!
  9. brakie

    brakie Active Member

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    Philip,What a great idea!! Kudos!:thumb: :D
  10. philip

    philip Guest

    wheelslip

    this is what happens when you leave the power on all night:sleeping:

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