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[Lord Atmo]

ok, i'm relatively new at being able to identify the type of a diesel locomotive by merely looking at it. but i'm still somewhat confused as to the finer detail. i mean, i can tell a General Purpose Diesel from a Special Duty diesel. but i can't tell an SD-90 from a Dash 9. and is there a difference between a dash 8 and a dash 9? i've been considering all diesels with the wider noses to be dash 9's or dash 8's until i found out the SD-90 has the same nose design. i'm way confused

my question is this, is there a site in existance that describes the specific characteristics of these types of diesel locomotives? i've been searching, but i cant find any.

[nanaimo73]

You are going to have to buy a book called a Diesel Spotter's Guide.
For now, just look at these pictures of whatever model you are interested in.
www.rrpicturearchives.net/modelList.aspx

[CSSHEGEWISCH]

Kalmbach's "Field Guide to Modern Diesel Locomotives" (is the title correct?) is quite helpful. You can probably order a copy through this website.