English Engineering units
From Infogalactic: the planetary knowledge core
Some fields of engineering in the United States use a system of measurement of physical quantities known as the English Engineering units.[1] The system is based on English units of measure.
Definition
The English Engineering units is a set of consistent units still in use in the United States. The set is defined by the following units,[2] with a comparison to the standard units based on the International System of Units.[3]
| Dimension | English Engineering unit | SI unit |
|---|---|---|
| time | second (sec) | second (s) |
| length | foot (ft) | metre (m) |
| mass | pound mass (lbm) | kilogram (kg) |
| force | pound force (lbF) | newton (N) |
| temperature | degree Fahrenheit (°F) | degree Celsius (°C) |
| absolute temperature | degree Rankine (°R) | kelvin (K) |
Units for other physical quantities are derived from this set as needed.
A similar system is termed British engineering units by Halliday and Resnick, a system that uses the slug as the unit of mass.[4]
