The Union Pacific Challengers are a type of simple articulated 4-6-6-4 steam locomotive built by American Locomotive Company (ALCO) from 1936 to 1944 and operated by the Union Pacific …

UP 3975 is an ex-SP unit. Union Pacific SD70Ms #3975 and #4062 lead the Roseville to San Jose Manifest (MRVSJ-04) through Pleasanton. A trio of Union Pacific locomotives near the …

Jun 17, 2021 · This group of passenger Challengers included UP 3940, 3944, and 3968, along with the 10 locomotives in the 3975-3984 group. In their new assignment, the newly-arrived …

Union Pacific 3985 is a four-cylinder simple articulated 4-6-6-4 "Challenger"-type steam locomotive built in July 1943 by the American Locomotive Company (ALCO) of Schenectady, …

In 1943, another 25 Class 4664-4 "Challengers" came from ALCO and were numbered 3975 through 3999. This group was very similar to the Class 4664-3s except that each weighed …

Union Pacific No. 3975 was a class 4664-4 4-6-6-4 Challenger Steam Locomotive, built in 1943 by the American Locomotive Co. for Union Pacific railroad. The Challengers were designed & …

UP 3975 : S/B thru Dalton. Date: 7/14/2006: Location: Dalton, GA: Views: 1004: Collection Of: Robert Duncan Sr. Locomotives: UP 3975(SD70M) Author: Robert Duncan Sr. Picture …

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 …

Oct 31, 2021 · Here's Union Pacific 4-6-6-4 late challenger in two tone grey No. 3975 pulls 18 cars along with 6 hoppers of real candy and 10 passenger cars on Pumpkin Run Halloween at …

2:20 PM at Bealville and three units in SP gray (UP 3975, SP 9814, SP 8184) are seen heading up hill Photo Date: 8/28/2000 Upload Date: 1/20/2008 9:49:18 PM