With apologies to John Teichmoeller, I have scanned in the relevant page from
his PRR hopper car book that shows
the car diagrams for the PRR GLa, B&O N-17 (their designation for their USRA
twins,) and the B&O N-12. These
diagrams show where dimensional differences and similarities between the
prototypes are. If one chooses to get the
height on an SHS conversion closer, taking 6" off the top of the side and
lowering the car 2" onto the trucks gets you
quite close.
Earl Tuson
> I dug out my H21 parts and did a little more research and IMO the SHS USRA
> hopper would make the best
candidate for GLa conversion. Inspired, I pulled one off the shelf and went to
work. I have a couple of photos in the
group photo section. I don't know how to link to it but the folder is called
"GLa conversion".
>
> Basically, I filled down the USRA end sill and removed the supports. I then
> added back the H21 supports and sill.
Since I started with a PRR car, all it needs is a bit of careful painting and
you are done. (Ok, not really)
>
> The brake end will be a bit more tricky since the GLa had a horizontal brake
> wheel and the platform is higher. Other
things needed are new end stirrups and the lifting ring. But to me that would
be good enough and not a funhouse
hack.
>
> Also, depending on the couplers used, there will be some work getting them
> mounted. The sill moves things out
and the pocket is prototype size making it a tight fit for some.
>
> So what I can (probably) supply is the end supports and sills.
>
> Note, that I looked at an AM hopper and though the same thing could be done,
> it would be much more work to
make it a GLa. Particularly redoing all of the ladders!
>
> Just my opinion.
>
> Keith Thompson
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