An elegant hydraulic calculator

Robert Owen Wynne-Roberts, MICE (Member of the Institution of Civil Engineers), FRSI (Fellow of the Royal Sanitary Institute), was a talented civil engineer. He passed away in 1935, but at least one result of his engineering talent abides: the Wynne-Roberts hydraulic calculator, a specialty circular slide rule for computing flow in water pipes and sewers.

Wynne-Roberts' Hydraulic Calculator

You can read about this elegantly packaged device in a new article on my history of computing site.

0 Responses to “An elegant hydraulic calculator”


  1. No Comments

Leave a Reply