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For all you guys who want something just a little different for your layout, I saw this last week and took these photos. The batteries died, so I didn't get more, but I think there are enough detail photos here to build a static model, anyway. The steam engine itself is the same inverted type with Stephenson's link reverse as the traction drillers used. (I can get photos of the engine on the driller at Portersville if there is interest)

I left the photos largish so you can better see details.

http://s397.photobucket.com/albums/pp52/steamnut1917/KeystoneEscavator/

No, I'm not really planning to build one, at least not yet.
 

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This looks really interesting, if you could get more photos and measurements I think I would like to build this escavator.

George
Northern Indiana
 

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Well, since it's 100 miles away I'll have to use the dimensions of the #3 Driller at Portersville to make an edjumacated guess.
The rear wheels are approx 48" in dia with a 14" face
The front wheels are 24" in dia with about a 12" face

The main sills should be 5" x 8" and right around 15 feet long.
The wood main part of the body is 4 feet wide.
The deck between the sills is 2"x8"s mounted on crosspieces bolted to the underside of the sills

The porcupine boiler is 32" and 5 feet tall

The flywheel on the engine is 34" in diameter and the crankshaft sits about 30" above the floor

I added some pix of the engine and gearing of the driller to the album to help you with the project.

Keystone also made a mechanically similar (different boom) skimmer shovel.
http://www.freewebs.com/mikesoldengines/file/skimmer_1.jpg
http://www.freewebs.com/mikesoldengines/file/skimmer_4.jpg
http://www.freewebs.com/mikesoldengines/file/skimmer_7.jpg

They also made infernal combusted versions later on
http://www.youtube.com/watch?v=cjL_yUJuiFs


Oh, and a vid showing the planetary drive on the cable drum
http://www.youtube.com/watch?v=2nx_hsXIQG0


Hope this helps
 

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Very cool! Thanks for posting that, Mik!

George, I have a bunch of photos of two Keystone Drillers. One is an abandoned machine I saw at an old mine, and is in bad shape with a lot of parts missing. But the other is an intact machine I saw at a museum in Ely, NV. The pics of that one may be useful in trying to replicate the excavator, in case there's something not shown in Mik's photos (though his look pretty extensive):

http://www.raydunakin.com/Site/Keystone_Driller.html
 

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Gentlemen,

Thanks for all the pictures and measurements which are now saved in a file for the upcomimg build. I, also, found the patent drawing for the Keystone excavator through Google patent search plus the scoop. I will probably not start until next year due to my garage being down and rebuilt. All my train stuff is boxed and getting ready for the rebuild.

George from northern Indiana
 
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