A rotorcraft, comprising: a body; a power train coupled to the body and comprising a power source and a drive shaft coupled to the power source; a rotor system coupled to the power train, the rotor system comprising a rotor blade; an actuator (530, 830, 1300) coupled to and operable to move the rotor blade; and a radial fluid device (600, 700, 900) in fluid communication with the actuator, the radial fluid device comprising: a cylinder block (604, 704, 904) comprising a first plurality of radially extending cylinders and a second plurality of radially extending cylinders; a first plurality of pistons (621 a-d, 721 a-e) each slidably received within a different one of the first plurality of radially extending cylinders; a second plurality of pistons (631a-d, 731a-e) each slidably received within a different one of the second plurality of radially extending cylinders; a first cam (622, 722) disposed about the first plurality of radially extending cylinders; a second cam (632, 732) disposed about the second plurality of radially extending cylinders, wherein the second cam (632, 732) has at least one more lobe than the first cam (622, 722), and characterized by the cylinder block being mounted for rotation. a body; a power train coupled to the body and comprising a power source and a drive shaft coupled to the power source; a rotor system coupled to the power train, the rotor system comprising a rotor blade; an actuator (530, 830, 1300) coupled to and operable to move the rotor blade; and a radial fluid device (600, 700, 900) in fluid communication with the actuator, the radial fluid device comprising: a cylinder block (604, 704, 904) comprising a first plurality of radially extending cylinders and a second plurality of radially extending cylinders; a first plurality of pistons (621 a-d, 721 a-e) each slidably received within a different one of the first plurality of radially extending cylinders; a second plurality of pistons (631a-d, 731a-e) each slidably received within a different one of the second plurality of radially extending cylinders; a first cam (622, 722) disposed about the first plurality of radially extending cylinders; a second cam (632, 732) disposed about the second plurality of radially extending cylinders, wherein the second cam (632, 732) has at least one more lobe than the first cam (622, 722), and characterized by the cylinder block being mounted for rotation. a cylinder block (604, 704, 904) comprising a first plurality of radially extending cylinders and a second plurality of radially extending cylinders; a first plurality of pistons (621 a-d, 721 a-e) each slidably received within a different one of the first plurality of radially extending cylinders; a second plurality of pistons (631a-d, 731a-e) each slidably received within a different one of the second plurality of radially extending cylinders; a first cam (622, 722) disposed about the first plurality of radially extending cylinders; a second cam (632, 732) disposed about the second plurality of radially extending cylinders, wherein the second cam (632, 732) has at least one more lobe than the first cam (622, 722), and characterized by the cylinder block being mounted for rotation.