Consolidated B-24 Liberator
The B-24 Liberator was Consolidated Aircraft's four-engined heavy bomber, first flown in 1939 and built in greater numbers than any other American military aircraft of the Second World War. Its efficient Davis wing gave it the range for bombing, maritime patrol and transport work in every theater; it was retired by the U.S. services soon after the war but flew on abroad, last with the Indian Air Force until 1968.
Why It Mattered
More Liberators were built than any other American military aircraft of the Second World War — over 18,000 in all — yet the type has usually stood in the B-17's shadow. It saw action in every combat theater of the war, in American service and with Allied air forces and navies. Range explains that reach: the Liberator could bomb distant targets, patrol ocean shipping routes and cross the Pacific, work no other Allied heavy bomber was asked to do in quite the same combination. Numbers, range and versatility together made it the war's utility heavy aircraft, as much a patrol and transport machine as a bomber.
Design Notes
The Liberator was designed around its wing: the Davis wing, shoulder-mounted and of high aspect ratio, chosen for efficient, fast cruising. The trade-offs were real: the efficient wing was unforgiving of careless loading, and pilots reported the aircraft relatively difficult to fly beside its contemporaries. Four Pratt & Whitney Twin Wasp radial engines powered the design, giving the Liberator the range to be useful across ocean distances. Production thinking shaped the aircraft as much as aerodynamics: it was built to be turned out in very large numbers, and was.
Operational History
The prototype first flew on 29 December 1939. The RAF became the type's second-largest operator, taking just over 2,000 Liberators by purchase, Lend-Lease and transfers in theater. RAF bomber squadrons flew Liberators from the Middle East, and from January 1944 the type was the principal RAF strategic bomber in the Far East. Coastal Command Liberators, with the range to patrol the mid-Atlantic, played a key role in the war against Germany's submarine fleet. In American service, Liberators bombed across every theater, from European daylight raids to the long over-water missions of the Pacific. The type's best-known mission is Operation Tidal Wave, the low-level second attack on Ploiești on 1 August 1943, flown at treetop height against the Romanian oil refineries. Away from the bombing campaign, Liberators worked as transports — the C-87 derivative — and as naval patrol aircraft.
Afterlife
The Liberator left front-line American service soon after the war, although its PB4Y-2 Privateer maritime patrol derivative carried on with the U.S. Navy. The last air force to fly the type was India's, which operated former RAF Liberators until December 1968. One of those Indian aircraft was presented to the RAF Museum by the Indian Government in 1974, and it remains on display in London. Survival is rare for so numerous a type: fourteen complete airframes survive today, one of them airworthy.