Hol Wagner has an interesting and pertinent discussion of this in The Colorado
Road (p. 141). The C&S's five E-4A mikados (equivalent of the Burlington's
class O-1) went through a fair number of modifications during their almost 50
years of service. Much of their careers, it turns out, were spent leased to the
Q for switching service (mainly?) in Denver. Upon their return to the C&S in
1947, engines 800, 802, and 803 were converted to oil burners for service north
of Denver.
Concerning the 57" drivers on these C&S mikes, I can only speculate their
reduced size had to do with operating conditions specific to the C&S, since the
C&S's F-4A Pacifics (equivalents of the Burlington's S-2 class) also had
"small" drivers (C&S 69" versus CB&Q 74"). Perhaps this was an adaptation to
the railroad's "profile" or to track conditions requiring greater adhesion.
Curious in that regard that the FW&D's sister E-4A1 mikados had big drivers,
same size as those on the CB&Q, while their F-3A Pacific's had the smaller
drivers, like those on the C&S. Your guess is as good as mine.
Jonathan
--- In CBQ@yahoogroups.com, William Barber <clipperw@...> wrote:
>
> John,
>
> I have seen no response to your question. Yahoo strips off
> attachments and photos. Did you post the photo in the photo file? The
> Oriental Limited model of the O-1a was a fairly accurate
> representation, but C&S 803 wasn't really an O-1a. It was more
> closely related to Q's earlier O-1 class mikados. However, the O-1
> class had 64" drivers. The O-1s were built in 1910 and 1911. The
> similar C&S mikes were built in 1911. Both had large cabs (some early
> O-1a's also had larger cabs), and small sand domes as compared to the
> O-1a's.
>
> As for an oil burning version of the O-1a, there weren't many.
> Looking through the 1935 locomotive assignment sheet in Corbin's
> book, none of the O-1a's were equipped to burn oil. In the later 1952
> assignment sheet, I find only 3 that had been converted to oil. These
> were 5063, 5077 and 5127, all assigned to the Sterling Division.
> There were a number of O-1a's assigned to Lines West that were
> lignite burners and a number of the larger O-2s were converted to oil.
>
> As for the 803, it was an oil burner in 1959 when I saw it under
> steam. When it was converted to oil, I do not know.
>
> Bill Barber
> Gravois Mills, MO
>
> On Dec 6, 2010, at 2:45 AM, CBQ@yahoogroups.com wrote:
>
> > Oriental O-1a
> > Posted by: "John Manion" railbass@... manionjohn68
> > Sun Dec 5, 2010 2:06 pm (PST)
> >
> >
> >
> > In answering a question recently on LMB O-1a's, I got out my
> > Oriental model
> > of a Q O-1a. The model is nicely painted and lettered for C&S #803.
> > However, it has the 64" drivers and short cab of a 4900, and #803
> > had 57"
> > drivers and a full cab. The model also has a straight-sided tender
> > with an
> > oil bunker. I am thinking this would be the arrangement for an O-1a
> > used
> > in the western divisions of the Q. I have glanced through my Q books -
> > Corbin, Hardy, Wagner, Spoor, Holck, and Burg's Campbell
> > Collection, and
> > been unable to find any photo of a similar oil-burning O-1a. I have
> > attached a photo of the model. Does anyone know what the prototype
> > of this
> > model would be and where it operated?
> > - John Manion
> > Denver, CO
>
>
>
> [Non-text portions of this message have been removed]
>
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