Union Pacific Prototype Locomotive Photos Volume 35, 4-6-6-4 Challenger - UP 3900-3939; UP 3800-3839, UP 3702, 3707, and 3710, Simple Articulated (1936, 1937 Series)
Volume 35 of the Union Pacific Prototype Locomotive Photos series documents the 4-6-6-4 Challenger locomotives, including the 1936 and 1937 series such as UP 3900-3939, UP 3800-3839, and units UP 3702, 3707, and 3710. This collection provides essential photographic insights into these simple articulated designs for railroad history enthusiasts.
About This Book
This book is part of the Union Pacific Prototype Locomotive Photos series, specifically Volume 35, focusing on the 4-6-6-4 Challenger locomotives.
It includes photographs of the UP 3900-3939 series, the UP 3800-3839 series, and individual units UP 3702, 3707, and 3710.
The content highlights these simple articulated locomotives from the 1936 and 1937 production series, offering visual documentation of their design and features.
As a specialized resource, it serves enthusiasts and historians interested in railroad engineering and Union Pacific's locomotive history.
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