energy was used and 75 of the energy was wasted referring now to fig7 the output of accumulator is not directed to control valve but rather to motor 150 motor 150 output torque is directed to drive pumps 152 154 and 156 all of which have the same volume displacement for the purpose of this example as line 134 required 900 p s i in the example of fig5 and 6 line 158 will require 3 900 2700 p s i to drive the motors which is readily available from the accumulator 140 low pressure tank 160 is provided to collect the returns from control valve 138 such that when 3 times as much is drawn from tank 160 by pumps 152 154 and 156 as is put into tank by motor 150 standard control fluid will be available as control valve 138 exhausts into tank 160 excess flow will be vented to sea through line 162 referring now to fig8 this is shown graphically on the x scale is can be seen that only u2153 of the volume of the accumulator was expended and the y scale shows that it was expended at 3 times the pressure for the same cross hatched area below line ef the wasted energy between lines ef and gh is less than u00bc of the wasted energy as seen.