Wheel spokes

[NW Mailing List]

Thanks, Ed.


  ----- Original Message ----- 
  From: NW Mailing List 
  To: NW Mailing List 
  Sent: Wednesday, March 25, 2009 4:53 PM
  Subject: Re: Wheel spokes


  No, although the main rod's weight is a factor, as are the weights of the eccentric cranks, back ends of the eccentric rods, etc..  It is because the A's main drivers were cross-counterbalanced; when drivers are cross-counterbalanced, they're counterbalanced as the pair on the axle, rather than as individual wheels.  This was often seen on the main drivers of locomotives but seldom on other drivers, which were usually counterbalanced as individual wheels.

  EdKing 
    ----- Original Message ----- 
    From: NW Mailing List 
    To: NW Mailing List 
    Sent: Wednesday, March 25, 2009 3:53 PM
    Subject: Re: Wheel spokes


    Very interesting.  I had always assumed that counterweights were centered exactly opposite the pin holding the rods.  While that appears true for the front and middle A drivers, it is obvious from the drawing that it is not true for the main driver.  Would this be because the added weight of the main rod throws the balance off-center?

    Sam Putney

      ----- Original Message ----- 
      From: NW Mailing List 
      To: NW Mailing List 
      Sent: Monday, March 23, 2009 8:20 PM
      Subject: Re: Wheel spokes


      Richard,

      I'm surprised no one else has answered this yet. The number is 15. 

      You can see drawings of the drivers at the following addresses:

      Front Driving Wheel http://www.nwhs.org/archivesdb/detail.php?ID=23293
      Intermediate Driving Wheel http://www.nwhs.org/archivesdb/detail.php?ID=23187
      Main Driving Wheel http://www.nwhs.org/archivesdb/detail.php?ID=23192

      Listing of more Class A wheel drawings is at http://www.nwhs.org/archivesdb/listdocs.php?index=rs&id=161&Searchword=wheel 

      Ron Davis

      At 03:15 PM 3/20/2009, you wrote:

        Hi chaps
        Can somebody tell me the exact number of spokes on a Class A driving wheel, thanks in advance
         
        Regards Richard in UK
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