The Union Pacific Big Boy is a type of simple articulated 4-8-8-4 steam locomotive manufactured by the American Locomotive Company (ALCO) between 1941 and 1944 and operated by the Union Pacific Railroad in revenue service until 1962. The 25 Big Boy locomotives were built to haul freight over the Wasatch Range between Ogden, Utah, and Green ...

Twenty-five Big Boys were built exclusively for Union Pacific Railroad, the first of which was delivered in 1941. The locomotives were 132 feet long and weighed 1.2 million pounds. Because of their great length, the frames of the Big Boys were "hinged," or articulated, to allow them to negotiate curves.

In 2024, Big Boy No. 4014 visited 14 of the 23 states served by Union Pacific, with full day stops in Roseville, Ogden, Rochelle, Houston and Fort Worth. Future schedules are still in the planning stage; stay tuned for updates!

Union Pacific 4014 is a preserved 4884-1 class 4-8-8-4 "Big Boy" type steam locomotive owned and operated by the Union Pacific (UP) as part of its heritage fleet.Built in November 1941 by American Locomotive Company (ALCO) in Schenectady, New York, it was assigned to haul heavy freight trains in the Wasatch mountain range.The locomotive was retired from revenue service on December 7, 1961, and ...

2024年8月25日 · Few steam locomotives compare to Union Pacific's (UP) colossus 4-8-8-4 "Big Boy." It was designed during the zenith of seam technology and earned celebrity status as soon as the first debuted in 1941.

2024年10月11日 · One of the biggest and most powerful steam locomotives in history has returned to life: Union Pacific’s Big Boy 4014. Big Boy weighs in at 600 tons, is 132 feet long, and can move at up to 80 miles per hour while pulling a fully loaded freight train with the force of about 7,000 hp. Union Pacific introduced the first of 25 of these steam ...

Weighing in at 1.1 million pounds and measuring nearly half a football field in length, the “Big Boy” locomotives were designed to haul heavy freight for the Union Pacific railroad over the mountainous regions of Utah and Wyoming. Originally, 25 of these giants were constructed from 1941 to 1944, and they roamed the rails until 1959.

2021年8月3日 · A: Big Boy was built to go as fast as 70 mph, but the locomotives rarely ran more than 50 mph, a speed the UP still finds convenient. Q: How much can it pull? A: With more than 6,000-horsepower, Alco and Union Pacific designed Big Boy to pull a 3,600-ton train across the mountains of Utah and Wyoming. Q: Where can I see this one or one of the ...

2024年5月7日 · Between 1941 and 1944, there were 25 Union Pacific Big Boy Locomotives made. Each Big Boy was approximately 132 feet in length and weighed upwards of 1.2 million pounds, making them the largest steam locomotives in the world.

The Union Pacific Big Boy locomotives are some of the largest and most popular steam locomotives ever made. We look at the history of these massive locomotives.