1drummer
Now why wouldn't you want to run six axle diesels like this? They have only been on the market for about 8 years now.
http://www.mthtrains.com/news/284
The Premier Line SD70m diesel engine, first cataloged in the 2005 Volume 2 Catalog, was not promoted with the Proto-Scale 3-2ﾙ feature which did not begin appearing in M.T.H.'s diesel lineup until the 2006 Volume 1 catalog. The SD70m and several other diesel engines promoted in the 2005 Volume 2 catalog were promoted with new wheel arrangements that placed flanged wheel sets on the outside of each truck block. Previously, M.T.H. had configured its six-wheel diesel truck blocks with flanged wheels on the middle and leading axles.
Because the outside flanged wheel locations required an entirely new power truck block, M.T.H. decided to incorporate the new Proto-Scale 3-2ﾙ feature into the Premier Line diesel locomotives equipped with six-wheel trucks and promoted in the 2005 Volume 2 catalog. Unfortunately this decision resulted in production delays of the SD70m, SD50 and SD70ACe diesel locomotives while the diesel version development of Proto-Scale 3-2ﾙ was completed. Both the SD50 and the SD70ACe have exited production and will begin delivering to consumers this Fall.
http://www.toytrainsontracks.com/index.html
The Dash-8s, Dash-9s, ES-44s, SD45s and Trainmasters also have all six axles powered.
