Union Pacific No. 3977 is a 4-6-6-4 "Challenger" type steam locomotive owned by the Union Pacific Railroad. 3977 was built in 1943 by the American Locomotive Company of Schenectady, New York. It was one of 25 of the next Class 4-6-6-4 Challengers (Nos. 3975-3999) bought by the Union Pacific that...

UNion Pacific Railroad 4-6-6-4 3977 likely at Schenectady, New York around June 1943. Number 3977 was built by Alco-Schenectady (c/n 70160) in June 1943 as a coal burner.

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 Railroad until the late 1950s.

Jan 1, 2009 · Union Pacific Challenger Class 4-6-6-4 #3977 is on display at Cody Park in North Platte, NE. It was donated to the City of North Platte by the Union Pacific and installed at the park in October 1968. UP Centennial Class DDA40X #6922 joined #3977 in August 1985.

3 Engine set on the point as this long empty autorack eases into Cantara Loop and about to cross the Sacramento River. All listed locomotives except UP 2242 but that was the lead power before the storage units came up.

Union Pacific 3977 is a four-cylinder simple articulated 4-6-6-4 "Challenger"-type steam locomotive that was built by the American Locomotive Company (ALCO) for the Union Pacific Railroad in July of 1943.

Before heading back to the Denver Airport, we make a quick stop at Cody Park, home of the only other Challenger type locomotive still in existence. Enjoy the walk-around & cab tour =) Table of...

There are two surviving Union Pacific Class 4664-4 "Challengers", number 3977 at Cody Park in North Platte, NE and number 3985 which is operational and used in excursion service by the Union Pacific.

Could anyone shed any light on Union Pacific Challenger #3977's second career as a snow melter (MOW # 900079) after it was officially retired in 1961? How did it perform its snow melting function? Did it still move under its own power?

Union Pacific 3977 or UP 3977 is a 4-6-6-4 steam locomotive originally owned by Union Pacific Railroad. Its counterpart, Union Pacific 3985, was the largest operating steam locomotive in the world until being taken out of service in 2010. 3977 was donated to the City of North Platte, Nebraska for display on