![]() ![]() By late 1963, the next conceptual design was named CX-X. These studies led to the "CX-4" design concept, but in 1962, the proposed six-engined design was rejected, because it was not viewed as a significant advance over the C-141. In addition to higher overall performance, the United States Army wanted a transport aircraft with a larger cargo bay than the C-141, whose interior was too small to carry a variety of their outsized equipment. ![]() In 1961, several aircraft companies began studying heavy jet transport designs that would replace the Douglas C-133 Cargomaster and complement Lockheed C-141 Starlifters. The Galaxy has also distributed humanitarian aid, provided disaster relief, and supported the US space program.ĭevelopment CX-X and Heavy Logistics System One of the first C-5A models is given a final inspection before testing in the Arnold Engineering Development Complex 16-foot transonic wind tunnel at Arnold Air Force Base in the mid-1960s. In that time, the airlifter supported US military operations in all major conflicts including Vietnam, Iraq, Yugoslavia, and Afghanistan, as well as allied support, such as Israel during the Yom Kippur War and operations in the Gulf War. The USAF has operated the C-5 since 1969. The C-5M Super Galaxy is an upgraded version with new engines and modernized avionics designed to extend its service life to 2040 and beyond. Shortly after entering service, cracks in the wings of many aircraft were discovered and the C-5 fleet was restricted in capability until corrective work was completed. The C-5 Galaxy's development was complicated, including significant cost overruns, and Lockheed suffered significant financial difficulties. The C-5 is among the largest military aircraft in the world. The Galaxy has many similarities to the smaller Lockheed C-141 Starlifter and the later Boeing C-17 Globemaster III. It provides the United States Air Force (USAF) with a heavy intercontinental-range strategic airlift capability, one that can carry outsized and oversized loads, including all air-certifiable cargo. The Lockheed C-5 Galaxy is a large military transport aircraft designed and built by Lockheed, and now maintained and upgraded by its successor, Lockheed Martin. ![]()
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