duty

A unit devised by the British engineer John Smeaton (1724 – 1792) to describe the efficiency of steam engines used for pumping water (as the earliest engines were). It is the number of millions of pounds of water raised 1 foot by burning 1 bushel of coal. Symbol, m.

Typical duties in the era of Newcomen engines were around 4m to 6m.

X

Sorry. No information on contributors is available for this page.

home | units index | search |  contact drawing of envelope |  contributors | 
help | privacy | terms of use