Union Pacific has retained only one of its 47 Centennial diesel-electric locomotives, No. 6936. The Centennials were the largest diesel-electric locomotives ever built. Actually comprising two engines on one frame, they delivered 6,600 horsepower.

Aug 7, 2024 · UPY Units-- An index page to all of Union Pacific's recent, beginning in 2000, UPY (Union Pacific Yard) units, including the UPY 900 series yard slugs and road slugs. UPY Genset Units -- Roster listings for the 83 former MP and SP B23 …

Nov 20, 2024 · Diesel Locomotive Roster -- An index page for the Union Pacific diesel locomotive roster, with full and complete coverage of the period of 1934 through 2001, including all merger.

Wikimedia Commons has media related to Union Pacific Railroad steam locomotives and Union Pacific Railroad diesel locomotives. Locomotives of the Union Pacific Railroad. The following 38 pages are in this category, out of 38 total. This list may not reflect recent changes.

The EMD DDA40X is a 6,600 hp (4,943 kW) D-D locomotive, built by EMD from 1969 to 1971 exclusively for the Union Pacific Railroad. [1] . It is the most powerful diesel–electric locomotive model ever built on a single frame, having two 16-645E3A diesel prime movers. [2] .

Union Pacific's high-speed diesel-electric locomotives were built for service on the famous streamliner and domeliner passenger trains. Learn more

Detailed roster of UP’s diesel locomotive fleet as of Jan. 1, 1999, including cross reference listings of former C&NW, SP, SSW, and D&RGW unit numbers to planned UP unit numbers, along with a quantity listing of locomotive model types on UP. 240 pages, 159 photos. Union Pacific Locomotive Directory 2000 Don Strack

The fleet currently consists of two historic steam locomotives, three historic diesel locomotives, seventeen modern diesel locomotives in historic or commemorative paint schemes and nearly four dozen passenger cars used on office car specials and excursion trains.

Jan 20, 2025 · When Union Pacific renumbered its entire diesel locomotive fleet in early 1948, some officials thought that the variety of locomotives used on passenger trains--some jointly operated and some exclusively UP--would make it difficult to keep accurate records for the purposes of equalization.

Union Pacific has retained only one of its 47 Centennial diesel-electric locomotives, No. 6936. The Centennials were the largest diesel-electric locomotives ever built. Actually comprising two engines on one frame, they delivered 6,600 horsepower.