@Rusty Traque posted:I seem to recall reading somewhere that the Phelps-Dodge ordered the first factory low hood on their GP9, for visibility back over the trains on their mine runs. I can't seem to locate the documentation, though.
Otherwise, it appears factory low hoods began to come into vogue with the GP/SD18 and became standard with the GP20 (except for Western Pacific and Great Northern.)
Rusty
Rusty's comments about the Phelps-Dodge GP9's from 1955 are supported here: http://www.railgoat.railfan.ne..._gp9/sp5872-5891.htm
This source references the Phelps-Dodge units as being a "customization and not a regular production feature". However it does not mention the source of that information.
C.J.