Prototype Information
The GP7 marked EMD's first serious entry into the road switcher market in 1949. Although it was late to the party, with similar road switchers from ALCO, Baldwin and Fairbanks-Morse having been in production for several years by that point, it ultimately became the most successful of the bunch. The GP 9 was a similar design with a horsepower upgrade to 1750 HP. Both models accounted for thousands of first-generation locomotives and was a common sight for much of the last half of the 20th Century, and the general design was retained up to the end of GP18 production in 1963.
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| NP 220 at Hoquiam |
The NP
introduced diesel locomotives to Gray's Harbor operations after WWII.
The Northern Pacific had Electromotive Division NP 220 (a GP-9) located
at Hoquiam for road service.
Based on a February 2000 Yahoo Group text, James Fredricson, a dispatcher for the NP, reported the following engines in road service on the 16th Subdivision on Friday August 21, 1959: Train Number 695 (Harbor Highball - the Auburn - Centralia - Hoquiam train) had NP Engines 332-252 (GP7) on the head end.The Hoquiam-Centralia Local had NP Engine 218 on the head end.
NP No. 218 and No. 220 were built in 1955. NP No. 332 was built in 1957. Picture of 558 (GP7) at Centralia Wa in October 1955
Engineering
Diagram
Specifications
I am going to Model NP No 220 on my layout. I have a LifeLike GP 9 Phase II Proto 2000 kit. I will add specific Northern Pacific accessories to it.
Process
To be continuedReference
Northern Pacific Railway Company, Office Of General Mechanical Superintendent, Distribution Op Power, September 1, 1955
Richard E. Buike, Northern Pacific GP7 Diesel Locomotives 1950 -1970, Prototype Modeler, June 1978
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