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Trucks

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  • Member since
    April 2020
  • 234 posts
Trucks
Posted by Ringo58 on Wednesday, September 16, 2020 3:45 PM

What is the difference between these trucks. Obviosly ones old and ones new, but when did the switch happen? Would you find both styles on trains?

Thank you!

 

  • Member since
    January 2010
  • 2,443 posts
Posted by peahrens on Wednesday, September 16, 2020 4:29 PM

I always forget whatever I knew on these details.  Looks to me like the top photo shows a roller bearing truck, the one in the lower photo a bit earlier vintage.

See the history in a related December 2003 MR article that you can download.  

https://mrr.trains.com/~/media/import/files/pdf/4/c/c/mr_pi_5-06_freightcartrucks.ashx

Here is a short article from Trains magazine.

https://trn.trains.com/railroads/abcs-of-railroading/2006/05/freight-car-trucks-and-carbodies

 

 

Paul

Modeling HO with a transition era UP bent

  • Member since
    November 2002
  • From: US
  • 2,367 posts
Posted by wp8thsub on Wednesday, September 16, 2020 6:50 PM

The truck in the bottom photo is a 50-ton AAR standard solid bearing type from Accurail.  Solid bearing trucks were banned from interchange in about 1993, but cars thus equipped started to disappear quite a few years earlier.

The top photo is the old Model Die Casting roller bearing truck.  It isn't a particularly good model of a specific prototype, but probably is closest to a Barber 77-ton design.  These showed up in quantity by the 1960s, and are still around today.

 

 

Rob Spangler

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