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locomotive bottom hitting frog of code 55 Atlas turnout

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  • Member since
    December 2019
  • 2 posts
locomotive bottom hitting frog of code 55 Atlas turnout
Posted by starfighter on Monday, December 16, 2019 11:55 AM

Anyone have ever had an issue with an Broadway n scale 3466 EMD SD70ACe Diesel Locomotive and the fuel tank is so low it seems to hit the fog area of a code 55 atlas turnout. The cork road bed seems to be ok and the track is not moving and seems to be on the road bed correctly? i am new to model trains and would appriciate any help or ideas? thanks

  • Member since
    December 2019
  • 2 posts
Posted by starfighter on Monday, December 16, 2019 7:10 PM

Took the n scale nmra gauge and could see that the atlas code 55 turnout guard rail and wing rail are not in gauge. I was able to file these rails so that they are in gauge and the engine is able to go thought the turnout much much easier.

is the the correct thing to do? Is this the case for these atlas turnouts. Seems like three of them have the same issue? Any help would be appreciated. Thank

  • Member since
    November 2013
  • 2,775 posts
Posted by snjroy on Tuesday, December 17, 2019 7:01 AM

I had that problem with one of my HO Bachmann tank engines. It was just slightly rubbing, so I fixed the problem by filing down the under plate (all my other locos were ok). I'm not in N scale, but I have read that frogs for HO turnouts can be filed down if they appear to be too high.

Simon

PS: It appears that I answered while your second message was "in moderation". Sounds like you fixed your problem!

  • Member since
    January 2004
  • From: Canada, eh?
  • 13,375 posts
Posted by doctorwayne on Tuesday, December 17, 2019 9:08 AM

snjroy
...I have read that frogs for HO turnouts can be filed down if they appear to be too high.

Simon's correct about the HO scale frogs.  Some time ago, a friend visited and brought several of his brass steam locomotives along, mainly to run and photograph them on my layout.

Several of them, particularly those with a long driver wheelbase, would stall on some turnouts, and we couldn't figure out why. 

I asked him to leave a couple of the locos with me, in order to find out what was causing this.  After putzing around for a while looking for the problem, I noticed that one of the locos, at that time stalled on an Atlas turnout, rocked when I pushed down on either the front end or the cab.
After dragging the loco out of the way (and with the track power off) I layed my scale ruler across the rails of the turnout, and as I moved it along, it caught on the frog.  This occured when done from either direction, and revealed the problem:  the long wheelbase, combined with the usually-too-stiff springs in these locos didn't allow the wheels to compensate for that minor height difference, and once all of the drivers lost contact with the rails, they also lost power.

I went around the entire layout, performing the same test, and found four or five which had the same problem.  A few passes across the rails with a not-too-coarse mill file took care of the issue, allowing those locos to pass through the turnouts with ease.  I'm guessing that perhaps there was a batch of Atlas turnouts produced with this issue, but it was very easy to rectify once identified .

Wayne

  • Member since
    April 2003
  • From: Clinton, MO, US
  • 4,261 posts
Posted by Medina1128 on Tuesday, December 17, 2019 10:57 AM

doctorwayne

 

After dragging the loco out of the way (and with the track power off) I laid my scale ruler across the rails of the turnout, and as I moved it along, it caught on the frog.  This occurred when done from either direction, and revealed the problem:  the long wheelbase, combined with the usually-too-stiff springs in these locos didn't allow the wheels to compensate for that minor height difference, and once all of the drivers lost contact with the rails, they also lost power.

I went around the entire layout, performing the same test, and found four or five which had the same problem.  A few passes across the rails with a not-too-coarse mill file took care of the issue, allowing those locos to pass through the turnouts with ease.  I'm guessing that perhaps there was a batch of Atlas turnouts produced with this issue, but it was very easy to rectify once identified.

Wayne

 

Wow, thanks for that idea, Wayne. I don't have any issues with normal commercially made turnouts, but I DO with a Walthers/Shinohara double-crossover. 

  • Member since
    January 2020
  • 16 posts
Posted by Andrey on Monday, January 13, 2020 1:16 PM

Thank you for this information.

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