Two Rod and Valve Gear Questions

[NW Mailing List]

 Replying to the last part of Question #2 - Most sources state that Pennsylvania RR was the only major proponent of left-hand lead (fireman's side) in the US.  Everybody else used right hand lead.  There may have been exceptions to this, but I don't believe N&W was one of them.

Dave Stephenson


    On Monday, August 6, 2018, 6:35:13 AM EDT, NW Mailing List <nw-mailing-list at nwhs.org> wrote:
Hopefully there will be some talent left around which can give an answer to these two humble little questions...




(1)  Is there always a mathematical ratio of 2:1 between (a) the distance from center of axle to center of main driving crank pin, on the one hand,  and (b) the length of the stroke of the piston, on the other hand?  (Prima facie, this sounds like a really, really dumb question... sorry.)




(2)  In quartering drivers on axles, how far in degrees is one driver advanced beyond perfect quarter, to insure that the engine will never be caught on dead-center?  (And I believe N&W used right-hand lead, contrary to most American practice, did they not?  If so, I wonder where that practice came from?)



--  abram burnett, (who should probably just stick to turnip farming...)
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