Editing Overland train (section)

===VC-12 Tournatrain ===
[[File:LeTourneau_VC-12_Tournatrain_Brochure_1953.jpg|thumb|LeTourneau VC-12 Tournatrain]]
The overland train concept first developed as a way to haul trees out of the bush, without the need to prepare a road capable of supporting a traditional truck. A truck would need to have a surface flat and strong enough for its driven wheels, normally four at the rear of the cab, to gain traction needed to climb any grades. With multiple driven wheels, LeTourneau's 6x6 diesel-electrics were an obvious solution, but a single vehicle was too small to justify their purchase costs. The solution was to turn the 6x6 into an extendable design, using flexible connections to allow any number of driven wheels to be added, as needed.{{sfn|Orlemann|2001|p=66}}

The first of these designs was the '''VC-12 Tournatrain''', which consisted of a power truck with a 500-hp [[Cummins]] VT-12 engine, and three 20-ton trailers. Each wheel was powered by a separate electric motor, four to each vehicle, including the locomotive. First tested in February 1953, after several months of testing, an additional four trailers were added, with the last holding a second engine. The new version was completed in February 1954, and supported a maximum payload of 140 tons.{{sfn|Orlemann|2001|p=66}}