Douglas C-118B Liftmaster

The Douglas C-118B Liftmaster was the United States Air Force’s transport variant of the civilian DC‑6 airliner, built by the Douglas Aircraft Company in the late 1940s. First delivered in 1949, the C‑118 series replaced the aging C‑54 and provided a pressurized, long‑range platform capable of moving troops, equipment, and high‑priority cargo across intercontinental distances. Powered by four Pratt & Whitney R‑2800‑31 radial engines, the B model featured strengthened wings, upgraded fuel tanks, and a reinforced floor to accommodate heavier payloads, giving it a maximum take‑off weight of roughly 107,000 pounds and a range of over 4,000 miles. The aircraft’s spacious, climate‑controlled cabin could be quickly re‑configured for passenger seating, medical evacuation, or bulk freight, and it incorporated advanced navigation and radio equipment for the era. Throughout the Korean and early Vietnam conflicts the C‑118B proved essential for rapid strategic airlift, supporting forward bases and transporting dignitaries. Its reliability and versatility helped define modern military transport concepts and laid the groundwork for later jets such as the C‑141. The Liftmaster remains a celebrated example of post‑war innovation that bridged civilian and military aviation.

Douglas

Douglas C-118B Liftmaster

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Design & Classification