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D&RGW Roundhouse C21

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  • Member since
    June 2002
  • 569 posts
Posted by drgwcs on Friday, August 19, 2022 4:03 PM

I think some of those outside frames might be a little tight. If memory serves me right the two inner wheelsets are blind (no flange)  and the outer ones flanged. The flanged wheels will have trouble in those middle slots. 

Jim

  • Member since
    November 2013
  • 2,775 posts
Posted by snjroy on Friday, August 19, 2022 12:28 PM

Robert is correct! I double-checked on my NMRA gauge.

  • Member since
    March 2007
  • From: College Station, TX
  • 675 posts
Posted by Arjay1969 on Thursday, August 18, 2022 10:12 PM

I just checked the one I have.  The distance of the wheels back to back is about 9mm.  Since the track gauge is 10.5mm (3x3.5mm), that would be right to allow the flanges to ride inside the rails.

Robert Beaty

The Laughing Hippie

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The CF-7...a waste of a perfectly good F-unit!

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Then it comes to be that the soothing light at the

end of your tunnel, Was just a freight train coming

your way.          -Metallica, No Leaf Clover

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  • Member since
    November 2013
  • 2,775 posts
Posted by snjroy on Monday, August 15, 2022 10:53 AM

Looks like an unsuccessful attempt to convert an HOn3 to an HOn30 model. You could try to pull the drivers back to their original width. But if the axles were filled away, then you are in trouble.

Simon

  • Member since
    August 2022
  • 2 posts
D&RGW Roundhouse C21
Posted by bw-udersfelde on Saturday, August 13, 2022 5:53 AM

Greetings from over the water.

I have picked up the MDC Roundhouse 280 kit at my local shop.  The model id barely started and the chassis runs smoothly but after doing some poking around I motice that the driving wheel back to backs are set at 9mm.  Looking at the HOn3 standard these should be 10.24mm.  When I did a check opening up the distance I noticed then that the wheels won't fit inside the outside frames.

Has anybody had experience of this and what to do about it.  As I see it the simplist way would be to open up the slot filing behind the outside frames or (not fancying this one) dissembling the outside cranks and narrowing the wheels.  The latter I think will affect the spokes of the wheels unless anyone has done it and thinks different.

Any assistance will be appreciated.

P.

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