The proposed Cryoflight cryocooler development effort will support NASA's long-term goal to increase aircraft efficiency and reduce aircraft emissions and noise. By providing a cryocooler optimized to meet the aggressive power density target required for aircraft systems, we will remove a key obstacle hindering the development of superconducting aircraft. While such aircraft are still two or three decades from production, supporting technology development needs to begin now if such aircraft are to become a viable alternative to the aircraft configurations in production today. The results of this SBIR project will support NASA design trade studies, system demonstrations, and eventual superconducting aircraft demonstrations. Other NASA applications include space applications such as cryogen liquefaction and storage for planetary and extraterrestrial exploration missions, crew exploration vehicles (CEVs), extended-life orbital transfer vehicles, in-space propellant depots, and extraterrestrial bases. Terrestrial NASA applications include cooling for spaceport cryogen storage and transportation systems and for demonstration hydrogen production and transportation systems. The highly reliable and space-proven turbo-Brayton cryocooler is ideal for these applications. The target application for this cryocooler is for cooling superconducting devices on electric aircraft once these aircraft are accepted in the commercial market. Other near-term applications for this technology include cooling superconducting generators for offshore wind turbines; cooling superconducting power transmission systems for data centers; cooling for laboratory and industrial-scale gas separation, liquefaction, cryogen storage, and cryogen transportation systems; cooling for high-temperature superconducting magnets in motors and alternators; liquid hydrogen fuel cell storage for the automotive industry; and commercial orbital transfer vehicles and satellites.