Conversion of one C-119B to meet USAF requirement for an experimental detachable-fuselage transport; C-119B wings and tail surfaces combined with new upper fuselage component with a flat surface; lower component with flat upper surface, and incorporating cargo compartment, could be mated with the Packplane; flight deck in upper component; the type could be flown with or without pack and it was intended that various packs for different military operations would be provided; first flown on 11 August 1950; no production contract followed military evaluation.