Wheel spokes

[NW Mailing List]

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
      ________________________________________
      NW-Mailing-List at nwhs.org
      To change your subscription go to
      http://list.nwhs.org/mailman/options/nw-mailing-list
      Browse the NW-Mailing-List archives at
      http://list.nwhs.org/pipermail/nw-mailing-list/


----------------------------------------------------------------------------


    ________________________________________
    NW-Mailing-List at nwhs.org
    To change your subscription go to
    http://list.nwhs.org/mailman/options/nw-mailing-list
    Browse the NW-Mailing-List archives at
    http://list.nwhs.org/pipermail/nw-mailing-list/


------------------------------------------------------------------------------


  ________________________________________
  NW-Mailing-List at nwhs.org
  To change your subscription go to
  http://list.nwhs.org/mailman/options/nw-mailing-list
  Browse the NW-Mailing-List archives at
  http://list.nwhs.org/pipermail/nw-mailing-list/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://six.pairlist.net/pipermail/nw-mailing-list/attachments/20090325/1e8c2e26/attachment.html>