Erie Canal Technology: Stump Pullers
Many years ago I saw a picture of a huge set of wheels that was used to remove tree stumps during the construction of the Erie Canal (1817–1825) and was intrigued by its use of leverage, mechanical advantage, and torque. Figure 1 is a scale model of the device based on my memory of the (lost) picture and published accounts.
“Erie Canal Technology: Stump Pullers”, The Physics Teacher, 51, 437 (2013)
The Physics Teacher