FEF-3 Wrote:
-------------------------------------------------------
> Hot Steamer Wrote:
> --------------------------------------------------
> -----
> > FEF-3 Wrote:
> >
> --------------------------------------------------
>
> > -----
> > >
> > > Of course it would make it through those
> > tunnels.
> > > SP
> > > cab forwards did and UP 3985 did.
> > >
> > > So far, there i9s no indication they will run
> > > anything
> > > west after GS.
> >
> > The Big Boys are abit longer than the Cab
> Forwards
> > and also the UP 3985... might be close
> clearances
> > in some of them. If they run any steam west I
> > imagine it would be the UP 844 to Sacramento
> and
> > return in 2019. SP 4449 would be appropriate
> and
> > a great unique PR move for the history of the
> > western end, but I don't see UP going for any
> > other locomotives other than their own to
> > celebrate.
>
> I should have said "without issues." Yes an SP
> AC
> is shorter than both a Challenger or a Big Boy,
> but
> not by much, and when the tunnels and sheds were
> enlarged for the AC's, they made them larger than
> absolutely necessary to clear ACs at the time, to
>
> allow for future, even longer and larger
> locomotives
> so they wouldn't have to do it over again. Same
> applies to the clearance in cuts on curves and the
>
> spacing between main and side tracks or between
> two
> main lines, especially on curves.
>
> In today's culture, that would be called
> expensive
> overkill. In those days, it was thinking about
> the future and that it usually costs less to do
> something a little bigger than absolutely
> necessary
> the first time than to have to do it twice.
>
> Same applies to the bridges built in the early
> 1900s,
> many of which are still serving well today.


I belive rhe AC-9’s couldn’t clear Donner