VARIABLE DISPLACEMENT PUMPS

In accordance with at least one aspect of this disclosure, a variable displacement pump (102) system can include, a variable displacement pump (102) disposed in a main line (104) and configured to supply pressure to receive a low pressure fluid and to output a high pressure fluid. The main line (104) can connect a hydraulic fluid source to a plurality of system actuators, where the variable displacement pump (102) is disposed in the main line (104) between the hydraulic fluid source and the plurality of system actuators to pressurize the hydraulic fluid.