There’s Only One Time to See Two “Big Boy” Locomotives at Cheyenne’s Depot DaysFor railroad buffs, it doesn’t get much better than seeing a Big Boy - the world’s largest steam locomotive. These 132-foot long behemoths weighted more than 1,250,000 pounds and were designed to pull massive freight trains over the Wasatch Mountains between Wyoming and Utah at speeds up to 80 miles per hour. When they said Superman was more “powerful than a locomotive,” this is the locomotive they were talking about. It was, in its day, the most powerful moving engine on earth.
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The locomotive visual in the 1950s Superman TV series did not show a Challenger. It showed a Southern Pacific GS-4 Daylight.
Sloan