>From my somewhat limited exposure to S scale, AM and SHS wheelsets (which are
>NOT really interchangeable, theSHS seem to be very, very slightly shorter,
>point to point) are easily distinguished: SHS freight trucks are
>double-insulated, AM insulated only on one side, with the insulated bushing
>"proud" (as our UK colleagues say), projectingabove the face of the inside of
>the wheel, while the SHS bushings are flush with the face.It gets even more
>interesting when one mixes in older trucks, such as Northeastern and Ace (and
>even Permabilt);those were produced over a long enough period of time that
>different wheelsets, steel, brass, and plastic, (and evenaluminum--I presume
>these are Millers) and different axle diameters can be found.
Jace Kahn
General Manager
Ceres & Canisteo RR Co./Champlain County Traction Co.
> Butch, The original powdered (steel) AM wheel sets were indeed #125, I
> think it was mentioned that they would run on most anything. Remember
> all the initial AM offerings came in a "scale only" version--hi-rail
> versions with claws came later. I do think that when Ron started having
> things made in China they might have changed to a finer wheel size.
> Actually they looked identical to SHS wheels. I would volunteer to
> check but my wheel sets have been mixed up considerably and they
> typically don't have names stamped on them to check their heritage.
>
> Some of what were talking about also applies to my problem with my AM
> Trainmaster that we talked about a few days back. The deeper flange of
> the 125 wheel is likely to stay on the track better when it comes to the
> various forces that a powered truck impose. While a typical car just
> has to ride the rails, a diesel has to keep on the rail, pivot, rock,
> endure twisting forces plus pull a trailing load or even worse push a
> load. If you ever doubt the forces I'm talking about find an older
> Overland engine like the FA or Sd-40-2's. Put the throttle to one
> (laying rubber acceleration) and watch it lift itself as it digs in!
>
> Bob Werre
> PhotoTraxx
>
>
> > Hey John,
> >
> > Why don't you post that comparative photo now. I'd like to see the
> > difference since I haven't committed to any specific wheels yet. I was
> > surprised the other day when I put a mic on an AM 33" wheel and it
> > came out to be code 125. I thought both AM and SHS used code 110 wheels.
> >
> > And we're always whining about something on this list but "Hey"! We're
> > the "S"pecial modelers. VBG.
> >
> > Butch
> >
> >
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
[Non-text portions of this message have been removed]
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