According to the book, Burlington Route Passenger Car Diagrams (by Railway
Production Classics), the 7200 series power cars had a four-cylinder Cummins
diesel driving a 40KW generator, and the 7300 series had a six-cylinder Cummins
driving a 65 KW generator. But, the basis of the question remains, why turn
the power car around in the first place? Some crew had to have either put it
on a turntable or run it around a wye. Why?
--- In CBQ@yahoogroups.com, William Barber <clipperw@...> wrote:
>
> Chuck and Hol,
>
> Chuck, your photos were taken in May and June of 1965 which is about the time
> that the 790 series cab gallery cars were introduced. Practices were changing
> at that time. In general, the power car was on the west end, but for the
> short mid day trains, it was probably not considered as important. There
> were, only five or six 7200 series power cars, which had been rebuilt from
> the old 7000 series open platform cars. All of the rest of the power cars in
> the 7300 series were rebuilt from 6100 series six wheel truck main line
> passenger cars; two combines and the rest were full coaches. I don't know
> for certain, but I believe the gen sets in the 7200 cars may have been
> smaller (lighter) and maybe less obnoxious? In any case, on a two car train,
> whether the power car was in front of or behind the other gallery car,
> probably didn't make much difference in terms of smoke and fumes that the few
> mid day passengers would encounter in Union Station.
>
> The E8s and E9s were set up so that they could power mid day two car commuter
> trains without the use of a head end power car. The 74 volt DC auxiliary
> generators on the locomotives had sufficient power to handle the cars. Here
> is a link that provides a typical example.
>
> http://rrpicturearchives.net/showPicture.aspx?id=1259393
>
> As for E7s on commuter trains, after the arrival of the E8s and later E9s,
> the E7s were seldom use in commuter service except occasionally on smaller
> trains as shown in Chuck's photos. The E7s, of course, were used in commuter
> service in the late 40s and early 50s, but as more E8s were delivered, they
> were preferred because they accelerated the longer heavier trains better and,
> therefore, could maintain the schedules more effectively. While the E8s and
> later, the E9s had a little more horsepower, that was only part of the story.
> The E7s were equipped with a 52:25 gear ratio which permitted 117 mph
> operation, but decreased low speed performance (like trying to start a
> automobile in 2nd or 3rd gear). (The 52:25 GR had a minimum continuous speed
> of only 40 mph. Some Q E7s were later converted to 55:22 GR which provided a
> max. speed of 97 mph.) TheQ E8s and E9s, on the other hand, were originally
> equipped with 55:22 GR originally which had a maximum speed of 98 mph and
> minimum continuous speed of 30 mph on the E8 and 33 mph on the E9. Some Q
> E8s were later re equipped with 57:20 GR that reduced the maximum speed to 85
> mph and lower the min. cont. speed to 26 mph.
>
> The lower GRs on the E8s and E9s and the minor increase in HP, gave them a
> better ability to quickly accelerate the full nine car commuter trains. I
> doubt that an E7, particularly with the 52:25 GR could maintain the schedule
> with a full size rush hour train.
>
> Bill Barber
> Gravois Mills, MO
>
>
> On Mar 2, 2013, at 6:54 AM, CBQ@yahoogroups.com wrote:
>
> > Power Car On East End On Dinky
> > Fri Mar 1, 2013 12:10 pm (PST) . Posted by:"chuck.zeiler"
> > chuck.zeilerHello, I have posted a couple photos at another site that show
> > the power
> > cars on the east end of a Dinky. This is somewhat unusual as the power
> > cars were typically on the west end, presumably to keep the noise and
> > fumes away from boarding passengers in Union Station. The question is:
> > Why were the power cars turned around? If this question has already
> > been answered, please direct me to that answer, thanks.
> > Photo 1 http://www.rrpicturearchives.net/showPicture.aspx?id=1082897>
> >
> > Photo 2 http://www.rrpicturearchives.net/showPicture.aspx?id=3316121>
> >
> > Photo 3 http://www.rrpicturearchives.net/showPicture.aspx?id=3394286>
> >
> > Reply to sender . Reply to group . Reply via Web Post . All Messages (2) .
> > Top ^
> > 4bRe: Power Car On East End On Dinky
> > Fri Mar 1, 2013 2:49 pm (PST) . Posted by:"HOL WAGNER" fhw632
> > Isn't it pretty unusual to see E7s in suburban service, too? As a far Lines
> > West guy, I've always thought the E7s were not regularly used on suburban
> > trains.
> >
> > Hol
> >
> >
> > To: CBQ@yahoogroups.com
> > From: czeiler@...
> > Date: Fri, 1 Mar 2013 17:33:42 +0000
> > Subject: [CBQ] Power Car On East End On Dinky
> >
> > Hello, I have posted a couple photos at another site that show the power
> > cars on the east end of a Dinky. This is somewhat unusual as the power cars
> > were typically on the west end, presumably to keep the noise and fumes away
> > from boarding passengers in Union Station. The question is: Why were the
> > power cars turned around? If this question has already been answered,
> > please direct me to that answer, thanks.
> > Photo 1
> > Photo 2
> > Photo 3
> >
> >
>
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