Shay Locomotive, no. 3172, detail.
20th c American Utilitarian Industrial Arts
Los Angeles. California. United States.
The drive gear has 20 teeth; the wheel, 45, giving the steam engine a mechanical advantage of 2.25.
Caption: LIMA LOCOMOTIVE WORKS | Shay Locomotive, no. 3172, detail. | 1922 | American | Utilitarian
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