Hydraulic motors, with related subjects, including centrifugal pumps, pipes, and open channels, designed as a text-book for engineering schools (1905)
Church, Irving Porter, 1851-1931 · New York : J. Wiley & Sons; [etc, ] · leaf 22
y-k— ? < s _-_> … 5^^r_ Fig. 3. pm and j)m. The motion of the water is assumed to be a steadyflow/7 so that these water columns do not fluctuate in height.Hence we write pm=Pa+yr, and Vm=Pa+yr, so that for steady motion the value of the resistance Rr shouldbe Rf = F\Pm-pm\ =Fr[y-y] = Frhl. Hence, the work done upon…
Hydraulic machinery
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten15unit-625-348.webp)