A landing gear actuator system comprising: an actuator body ; an operating apparatus; a piston locking apparatus; a gas pressure adjustment apparatus; and a hydraulic fluid adjustment apparatus, wherein the gas pressure adjustment is configured to adjust a gas volume of a landing gear strut gas chamber in response to the operating apparatus, wherein the hydraulic fluid adjustment apparatus is configured to adjust a hydraulic fluid volume of a landing gear strut shrink chamber in response to the operating apparatus, and wherein the gas volume and the hydraulic fluid volume are adjusted inversely; wherein the operating apparatus comprises a hydraulic fluid drive reservoir and a piston member , wherein the piston member is translatable in response to an introduction of hydraulic fluid in the hydraulic fluid drive reservoir , wherein the gas pressure adjustment apparatus comprises a gas storage reservoir , wherein the hydraulic fluid adjustment apparatus comprises a hydraulic fluid storage reservoir , wherein the piston member is disposed between the hydraulic fluid storage reservoir and the gas storage reservoir such that a translation of the piston member inversely changes a volume of the hydraulic fluid storage reservoir and a volume of the gas storage reservoir with respect to one another; the system further comprising a strut gas pressure isolation valve in fluid communication with the gas pressure adjustment apparatus, wherein the strut gas pressure isolation valve comprises a trigger and is configured to open or close fluid communication between the gas storage reservoir and the landing gear strut gas chamber ; wherein the strut gas pressure isolation valve is configured to isolate the landing gear strut gas chamber from the gas storage reservoir when the piston member contacts the trigger . an actuator body ; an operating apparatus; a piston locking apparatus; a gas pressure adjustment apparatus; and a hydraulic fluid adjustment apparatus, wherein the gas pressure adjustment is configured to adjust a gas volume of a landing gear strut gas chamber in response to the operating apparatus, wherein the hydraulic fluid adjustment apparatus is configured to adjust a hydraulic fluid volume of a landing gear strut shrink chamber in response to the operating apparatus, and wherein the gas volume and the hydraulic fluid volume are adjusted inversely; wherein the operating apparatus comprises a hydraulic fluid drive reservoir and a piston member , wherein the piston member is translatable in response to an introduction of hydraulic fluid in the hydraulic fluid drive reservoir , wherein the gas pressure adjustment apparatus comprises a gas storage reservoir , wherein the hydraulic fluid adjustment apparatus comprises a hydraulic fluid storage reservoir , wherein the piston member is disposed between the hydraulic fluid storage reservoir and the gas storage reservoir such that a translation of the piston member inversely changes a volume of the hydraulic fluid storage reservoir and a volume of the gas storage reservoir with respect to one another; the system further comprising a strut gas pressure isolation valve in fluid communication with the gas pressure adjustment apparatus, wherein the strut gas pressure isolation valve comprises a trigger and is configured to open or close fluid communication between the gas storage reservoir and the landing gear strut gas chamber ; wherein the strut gas pressure isolation valve is configured to isolate the landing gear strut gas chamber from the gas storage reservoir when the piston member contacts the trigger . <EOS>