cdaspit Wrote:
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> Russo Loco Wrote:
> --------------------------------------------------
> -----
> > Earl Wrote:
> >
> --------------------------------------------------
>
> > -----
> > >
. . . The last Rotarys were indeed
> built
> > by
> > > Lima & used cylinders from Pacific Coast
> > > model Shays. There were two sets of 3
> > > cylinders, geared to the center shaft.
> >
> >
> > Now I'm really confused -
> >
> > I thought the "Pacific Coast' shays weren't
> really
> > Shays, but copies built by Willamette after
> Lima's
> > patents expired. So why would Lima use
> > 'Pacific Coast' cylinders when building rotary
> > snowplows?
> >
> > -
Roosso (MUY) Loco
>
> PC shays were indeed built by Lima and were the
> answer to the West Coast Special Heisler.
> Willamette built their locomotives after many of
> the shay patents expired with some key
> improvements added. The quickest way to ID a PC
> shay is to look at the crankshaft. If you see
> counterweights, it's likely a PC shay. They also
> had enclosed cabs for handling the foul wearther
> and the frames were much beefier.
Pacific Coast models also had piston valves from the factory. Some large Shays had piston valves retro-fitted to them, but most still looked like slide valves. PC models also had the cab entirely behind the engine unit. Willamettes had the valve steam chests facing outward, both slide valve and piston valves.