The Lockheed C-69 Constellation was a four-engined, propeller-driven military transport aircraft developed during World War Two. It was co-developed with the Lockheed Constellation airliner. It first flew in 1943, and production of the 22 constructed was shared between the United States Army Air Forces (15) and commercial carriers. Most of the C-69 aircraft built were later converted into civilian airliners under the designation Lockheed L-049 Constellation.