The classification for the GE's six-axle designs are quite similar to its four-axles. For instance, in the case of the U25C; "U" regarded its Universal line, "25" was the first two digits of its horsepower rating, and "C" described its powered axle rating (C-C). At 60 feet, 2 inches in length the U25C was actually the same length as the four axle U25B. However, beginning with the U28C GE began increasing the length of its C-C road switchers (and they continued to grow with the U30C through U36C). All of the locomotive's internal equipment including main/auxiliary generators and traction motors were all constructed by GE itself while air equipment was supplied from Westinghouse Electric.
The most noticeable benefits of the U25C was, as mentioned above, its
starting tractive effort rating of 90,000 pounds nearly 17% higher than
with the U25B. This allowed the locomotive to get trains started much
faster. While railroads were still reluctant to purchase
high-horsepower six-axle locomotives at the time within a few years they
began to come around as GE would sell more and more such models
following the U28C, U30C, U33C, and U36C (combined, these models would
sell well over 1,000 examples).
By the time production on the GE U25C had ended in December, 1965 some
113 units had been sold six different Class Is including the
Atlantic Coast Line (21); Burlington (12), Lake
Superior & Ishpeming (2), Louisville & Nashville (18), Northern Pacific (30), Pennsylvania (20), and ten that were purchased for the Oro Dam in California (these units later went to the L&N). Today, at least one GE U25C is known to be preserved, LS&I #2501, still owned by the railroad since it was
bought new in 1964 and on display in Marquette, Michigan.
GE U25C Production Roster
|Atlantic Coast Line||3000-3020||21||1963-1965|
|Lake Superior & Ishpeming||2500-2501||2||1964|
|Louisville & Nashville||1500-1517||18||1965|
For more reading about GE's U-boat line the bookU-Boats: General Electric's Diesel Locomotive by author Greg McDonnell provides a complete history of the company's first production diesel models. Also, noted historian Brian Solomon has authored a number of books covering the history and background of GE's locomotives. Two, which provide a general but thorough coverage include GE Locomotives and GE And EMD Locomotives: The Illustrated History. As with virtually all of Mr. Solomon's you can expect a well-written title with large, crisp, and sharp photographs.