02165 Union Pacific "Big Boy" Model Kit option-set-071 Kit Instructions & Chimneys
Description
Kit Instructions & Chimneys
Pack of 50 ‘tags
signals and other magnetic articles can be switched
Make rocks where wind and water has battered the rock formations
but mass production began without this last change
02165 Union Pacific "Big Boy" Model Kit option-set-071 Kit Instructions & ChimneysThe American Big Boys are among the longest and largest series steam locomotives ever built in the world. During the late 1930s, Union Pacific often used auxiliary locomotives to pull trains from Ogden, Utah to Wasatch over a steep pass. UP wanted to simplify this system and commissioned its own development department to design a new locomotive that could pull a 3,600 t train (up to a maximum of 4,200 t) up the steep pass. The 25 Big Boy locomotives
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