On display in front of the World Forestry Center in Portland, Oregon, Peggy is an old-style Lima Shay-geared locomotive that hauled an estimated billion feet of logs. Built in 1909 by Lima Locomotive Works in Lima, Ohio, Peggy worked in the forests of Washington and Oregon.
According to the display:
“Shay locomotives used vertical steam cylinders and gears all the wheel. The wheels are mounted in pairs called trucks that can pivot to follow the curved of the track. This design delivers equal torque directly to all wheels on both sides of the engine at the same time. The trucks move independently and therefore have very little difficulty following poorly constructed railroad tracks. For their size and weight, Shay locomotive are very powerful, but also very slow.”
The concept of the Shaw locomotive began with sawmill owner Ephraim Shay (1839-1916) and most were built by Lima Locomotive works.