http://archive.trainpix.com/BNSF/GEORIG/AC4400CW/INDEX.HTM
On this website it says that these units were gevo units, are these experiments units or are they just ES44AC units? thank you for your help.
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According to the July/August 2004 issue of “Diesel Era” magazine, BNSF 5718-5747 were “pre-production” AC Evolution series locomotives.