Thanks for the responses. I thought the subject came up fairly recently so I
apologize for the repeat question.
Ricky Keil
Bellevue, NE
> To: CBQ@yahoogroups.com
> From: clipperw@gmail.com
> Date: Mon, 3 May 2010 08:45:32 -0500
> Subject: [CBQ] Re: GP (and SD) Headlight Operation Question
>
> Rick,
>
> There was a previous thread on this topic several months ago. You may
> want to reference that. The lower two lights, which were in the
> standard EMD housing, were the normal headlight that were
> repositioned to make room for the higher mounted Mars. The Mars
> lights on the GP units were similar if not identical to those used on
> Q steam locomotives. The white light in the Mars housing usually
> gyrated, (in a figure 8 pattern IIRC) but could be placed in a fixed
> position anywhere in it's rotating cycle. Neither light was designed
> to flash. The red light was wired so that it only came on in an
> emergency brake application. It was not a running light. If a GP unit
> was making a reverse movement, there were red lenses in the class
> light assemblies to provide rear marker lamps. Generally, at night,
> both the fixed road headlight and the white Mars light were on. In
> the daytime, depending on the time period, there was no light or just
> the fixed headlight.
>
> Bill Barber
> Gravois Mills, MO
>
> On May 3, 2010, at 3:59 AM, CBQ@yahoogroups.com wrote:
>
> > GP (and SD) Headlight Operation Question
> > Posted by: "Rick Keil" rkeil6721@hotmail.com redgrey62
> > Sun May 2, 2010 4:43 pm (PDT)
> >
> >
> >
> >
> > I'm finally gathering the parts needed to detail a couple of Atlas
> > GP7s. As I get the proper lights, I pondered a question on their
> > operation. I believe the lower two lights are the actual headlights
> > and the upper two are a Mars light and the emergency (?) lights. I
> > usually associate a Mars light with the gyrating light on the E and
> > F units. When was the Mars light on the GPs or SDs used and how did
> > it appear, steady, flashing, gyrating?
> >
> > Thanks
> >
> > Ricky Keil
> >
> > Bellevue, NE
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
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