•00189 V h = horse's power, and 528 HP / V = V; V representing volume of water, in cubic feet, per minute, and h head of water from race in feet.

Effective Horse-power for different Motors. Theoretical power..................................................... 1.

Undershot wheels.........

= .4

Poncelet's un'shot wheel

= .6

Breast wheel (high)....

= .55

" (low).....

= .6

Overshot wheel.............

= .84

= .64

Reaction wheel..........

= .2

Impact wheel...........

= .5

Turbines..................

=.6

=.75

Termont turbine.......

= .79

Hydraulic ram..............

= .6

Hydraulic Ram

882 HP / h = V, .00113 V h = HP; V representing volume of water in cubic feet per minute, h head of water in feet, and HP actual horsepower.

Jet Pump

The greatest effect of a Jet Pump is when the depth from which the water is drawn through the supply or suction pipe is .9 of the height from which the water fell to give the jet.

The flow up the suction pipe being .2 of that of the volume of the jet; hence the effect = .9 x 2 = .18.

Imperial Gallons. 6.2355 Gallons in a Cubic Foot.