William Rankine
1820 – 1872
Founding thermodynamicist and soil-mechanics pioneer; a temperature scale bears his name.
A Scottish engineer and one of the founders of thermodynamics alongside Kelvin and Clausius, Rankine also did foundational work in soil mechanics and structural analysis. The absolute Fahrenheit temperature scale bears his name.
He wrote the era's definitive engineering manuals, bridging pure science and the drawing board — the model of the practicing engineer-theorist. Earth-pressure and thermodynamic quantities here trace to his work.
Portrait: a stylized blueprint-line rendering, not a photograph.
Contributions in the toolbox
- 1853
The term 'potential energy' coined.
→ Gravitational Potential Energy - 1857
Stress-state earth pressure theory; Ka in closed form.
→ Rankine Earth Pressure - 1859
Fahrenheit-sized absolute scale for engineering.
→ Temperature Converter - 1869
Whirling speed identified — and supercritical running wrongly forbidden.
→ Shaft Critical Speed (Deflection Method)