Force (lbs) is determined by multiplying the area of the piston by the pressure (PSI).
(π x r2 x PSI)
Speed (sec. per stroke) is determined by the volume of the cylinder (gal.) divided by the volume of the pump (GPM) x 60 sec per min.
( Vcyl ÷ GPM x 60)
You can download Don’s “Cheat Sheet” here. It calculates force, speed and many other things for you on an Excel spreadsheet.
