The Union Pacific’s Engine 4014 ‘Big Boy’ Steam Locomotive was passing through Arizona this week, so I thought I’d take my drone out to video it. The largest steam engine built, weighing in at over 1,200,000 pounds, it is the only one functional today. Only 25 were built and they were retired in 1961 when diesel-engine locomotives became prominent. Restoration on this engine began in 2014 and after it was completed in 2019, it was sent out touring the country.
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