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Union Pacific's Big Boys

the Complete Story From History to Restoration
May 05, 2021Dave99_0 rated this title 4 out of 5 stars
The Big Boys are the biggest steam locomotives ever built. One Big Boy produces power equivalent to two regular sized diesel locomotives. There is a great longitudinal cross-section showing how a steam locomotive is designed. There are also terrific shop photos showing how a steam locomotive is restored. For steam locomotive fans, I would rate "Union Pacific's Big Boys" at 4.0 stars.