Looks like Southern cars?

They look like the cars that the Southern had built and maybe rebuilt or modified?

Walthers did a version of them awhile ago.

Walthes Southern Woodchip

Greenville

Looks like your average greenville woodchip cars. It's hard to see the panels though.

http://www.ho-scaletrains.net/walthersfreightcars/id165.html

http://railroadstrains.blogspot.ca/2014/12/sou-139667-gondola-wood-chip-open.html

possibly...

I think those were built as is. They are similar to FCA's woodchip gons: http://www.freightcaramerica.com/Woodchip-Cars.htm which were originally designed by Bethlehem. They may be an older vintage Beth gon. Here is a similar one for lease: http://www.boxcarco.com/railcar-inventory/7000-cubic-foot-woodchip-hoppers-for-lease/

car number?     Couldn't find

car number?     Couldn't find any photos of that car number or any 6 bay hoppers on rrpictures archives . They look similar to the Southern cars but have either double ribs or larger ribs near the end panels......DaveB

Shot with ribs and mesh for keeping the chips in.

Thank You guys, got a better picture and now can see the ribs on both the UP & GN cars.

Bill thanks for the lead on the Greenville car, how far back does this type of car go 60's - 70's?

Much appreciation for you old time modelers!

RJ

According to Walthers...

https://www.walthers.com/exec/productinfo/932-5695

The historical blurb here says:

Woodchip cars

Those light blue cars with the paint out spots sure look like former Rock Island (The Rock) woodchip cars.  Those cars were former Rock Island number series 88500 - 88549 built by the Greenville Car Company.  My Morning Sun book on Rock Island freight cars states they were 59 feet long and 15 feet high with a 5825 cubic foot capacity.  

Ex Rock?

Based on the paint outs (especially on the blue ones), I'm thinking these are ex-Rock Island cars.

Here's one in red from  http://www.rr-fallenflags.org/ri/ri.html .  The above photo was dated 1972.  The build date looks like it may be 1966.  

Not sure of the lineage but

My gratitude to all, have most of the puzzle!

Thank You for your expertise, the Rock Island is correct for the blue ones. The logo was a great detail I missed in this puzzle.  Mr Michael Woodruff shot the photo back in the day and responded to my e-mail plea. He says they were all ex-Rock Island cars that UP got after the Rock Island shut down. So now I have a start on my modeling project and of course the research to do to get them looking like the photo's.

fishnmack the dimensions are really appreciate.

Again thank all who helped me get this far. 

RJ

Better picture of these cars!

Thanks to Mr. Rob Spangler who did a lot of research, I think we have the correct cars. Now to find a source for these.

Thanks again for the shared knowledge.

RJ

Nice!

Great community effort here - Great Find!

Base model

I suggest that you use the Walthers Greenville Steel car woodchip hopper as a base model. The slopes sheets are the same as are all the ladders. Shorten the car to the appropriate length. Use thin styrene sheet and  laminate it to the outside of the posts of the Walthers car. Use a chisel blade to carefully remove the triangular bulges from the side of the Walthers car as well before laminating the styrene sheet to the side then laminate those triangular bulges to the outside of the new sides to replicate that detail. Use styrene channel on the ends of the smooth siding above the bolsters and you should have something pretty close. Something to consider once you have made a replica of one side with the triangular bulges would be to cast it in resin and do several. That's my  2 cents. I hope it helps.

Shane

one thing I forgot.

Use Archer 3D bolt decals for the sides to represent the bolt detail.

Shane

Expensive, but available!

I bought one of these on Shapeways.  It is printed using 3-d technology.

They are undecorated, but can be painted for railroads such as Southern,

NS, IC, ICG, GM&O, LN, CofG, UP, RI and others.

http://www.shapeways.com/product/GWTDXARVL/ns-sou-cg-ln-ri-gmo-greenville-chip-hopper?li=shop-results&optionId=57398622

[resized this image to fit - Bill]