That style of cab vent was used on virtualy all of the Q's steam engines. The
entire hatch could be rasied about six inches. I've never seen a picture where
only the front of the vent was raised, so I'd say it wasn't possible.
Here's a link to a picture from the Denver Public library showing the vent in
it's raised posistion. It's not the clearest picture, but it's the only one of
an M4 I can find on the web right now.
John.
http://photoswest.org/photos/00004001/00004018.jpg
--- In CBQ@yahoogroups.com, "atsf90" <atsf3460@...> wrote:
>
> Does anyone have a clue as to how the cab roof vent works on a 2-10-4? I'm
> looking at my old NPP HO Scale model and am trying to understand how it
> worked. It looks almost like a low clestory on a passenger car but that
> can't be right? Did the whole thing angle up from the front of the cab roof
> and prop open from the back? My scale measurement shows the vent is 2 feet
> wide and 6.5 feet long.
>
> This would be a lot easier if the "Q" would have saved one less Hudson and
> donated #6315 to Beardstown, IL for display in their city park. I could just
> go over to Beardstown and look at the roof myself.
>
> Thanks!
>
> Mike Martin / Mahomet, IL
>
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