from the Fig. I guess... # K u- P1 _, ~& e! K: Y 0 y+ L" C3 @6 w& ?variable displacement and fixed displacement pumps ) b8 d+ c, \0 U3 u8 H' e8 n: ]* C- k8 P- L) Z* o+ f# x; Y& t+ g4 B
you can change the swash of one pump to vary the displacement and then change the flow $ @) `+ A; f+ c9 r1 o9 [) h! N+ W$ P' X3 t8 R
actually the first Fig tells you the relationship of Load pressure and flow . & T9 b" M& r# Y* W: X0 Fbased on it . you can determine the horsepower loss and suitable operating pressure. - H. G. a& P1 O. y 3 C1 o3 d( y8 ?7 |+ tI guess all above.. not 100% sure