Please explain the difference between a E-7; E-9; EMD GP-28 and EMD FP-45 are ?
Paddy,
All are EMD diesel-electrics, sort of.
The E series are double engine passenger units riding on two 1-A-1 trucks. E-7 is late 1940's while E-9 is last of the series and built ca. 1950-59.
GP series are single engine, typically freight service, units on B-B trucks. GP 28 was a late model, 2000 HP with 645 engine IIRC.
I do not recall any FP-45 model. The FP series were F units stretched about 4 feet to provide room for steam boilers for passenger service. They were relatively rare as the western roads that favored F units for passenger service like GN, NP, and ATSF managed to get boilers in the basic F unit car body before EMD came out with the FP series.
Toward the mid to late 1960's a few SDP-40 and SDP-45 units, which were six axle SD units with steam boilers for passenger service, were built. These were to replace aging F units and could be easily converted to freight service when the carriers exited the passenger business. The GN bought a few F-45 units which were basically SD-45 mechanical parts with a wide car body. The idea was to allow crews to access the machinery in an enclosed environment, a big plus in the northern winter.
Kalmbach's Diesel Spotters Guide should cover these and many more, and more accurately as this is all by memory.
Mac
These are EMD model designations:
E - Twin engine passenger engines built from the late 30's through the early 60's. Model E-7 was a 2000 hp unit, and model E-9 was a later 2400 hp unit. They rode on 6 axle trucks, with only 4 powered axles.
GP28 - Part of the General Purpose line. The GP28 was rated at 1800 hp. These are 4 axle units.
SDxx - These are similar, but are 6 axle units. The 'SD' stood for Special Duty
FP45 - a 6 axle unit enclosed in a 'cowl' car body. Only Santa Fe & Milwaukee Road purchased them in the late 60's.
You might want to pick up a copy of Kalmbach's Diesel Spotters Guide for additional information.
Jim
Modeling BNSF and Milwaukee Road in SW Wisconsin
Hello,
Maybe some pictures would help?
FP45
GP28
E7
E9
(Note, these are not my pictures)
I third the motion to find a Kalmbach DSG, but if you can't (as they are out of print), I recommend The Modelers Guide to Diesel Locomotives, by Jeff Wilson, as a good place to start.
NW
As a Christmas gift to my adult stepson, who is getting into our hobby, I was able to find copies of the "Second Diesel Spotters Guide" and Greg McDonnell's "Field Guide to Modern Diesel Locomotives" on Amazon without paying an arm and a leg.
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