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.