Erie canal technology: stump pullers

• Autores: Thomas B. Greenslade Jr.
• Localización: The Physics Teacher, ISSN 0031-921X, Vol. 51, Nº. 7, 2013, pág. 437
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • 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.1