View single post by Herb Kephart
 Posted: Sat Oct 15th, 2016 04:29 am
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Herb Kephart



Joined: Thu Jul 19th, 2007
Location: Glen Mills, Pennsylvania USA
Posts: 5929
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2' gage WW1 ''trench railway'' piece of equipment. 130+ built, many by the Crew shops of the North Western Ry, delivered to France 1917--'19.

Concept was that it was to be convertible from a road (thus the steering wheel) , to a rail unit and back. Parts for conversion are carried in rear tray.

As a rail tractor, they were designed to climb a max grade of 1 in 20, and go around a min. 30 meter radius curve, haul a load of 5 tons at 15 MPH on flat track--and to haul the same up the 1/20 grade, being able to start and stop with that load on the grade. Took about an hour to convert from rail to road, or back again. To avoid having to run in reverse on rail, with the attendant overheating problems, they units had built in turntables, by which they could be turned end for end in about three minutes, by two men. For a photo of one in road configuration see Roy Link's ''WDRL Album'', page 178. Most spent their life as rail units--where the 5 ton load was limited by the poor, and/or rough track.

IBID p.178-181, and also ''The Engineer'', Oct. 1918

Might this be where  Orrie Voss got the turntable under the SRRL Model T touring inspection cars?


Herb

PS-- More details of the mechanical bits of the conversions for Woodie--just in case he wants to build a BPRC convertible model. The Sliver City line could have bought one as surplus after the war, you know. How does that go Woodie, ''I double cat dare you?'' Something like that.

''Light Railways of the First World War'', W J K Davies, David & Charles Ltd. 1967  Pgs 160-162.

H



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