The Lockheed B-24 Liberator originated in the USA and England in 1939. Besides being used as a conventional bomber, it was also used for naval reconnaissance, anti-submarine warfare and transport purposes. Its elongated wing was an advanced design of its time with laminated leading edges and high aerodynamic 
efficiency due to the incidence on the wing. The prototype first flew on December 29, 1939 powered by four Bristol Hercules radials and two Fraser-Nash gun turrets. The Liberator went into service in April 1942. The production Liberators were powered by four Pratt & Whitney R-1830-43, rated at 1,200 hp each. The gun turrets were American-built versions of the Boulton-Paul gun turrets and the Frazer-Nash gun turrets. A total production of 18,181 made the B-24 Liberator one of the highest produced bombers in the US aircraft industry. The arnament consisted of eleven 0.50 calibre machine guns (with three gun nose modification), plus provision for up to 8,000 Ibs (3,628 kg) of bombs. the Liberator's maximum speed was 303 mph (487 km/h). The service ceiling was 32,000 ft (9,753 m). the Liberator was retired in 1948.
efficiency due to the incidence on the wing. The prototype first flew on December 29, 1939 powered by four Bristol Hercules radials and two Fraser-Nash gun turrets. The Liberator went into service in April 1942. The production Liberators were powered by four Pratt & Whitney R-1830-43, rated at 1,200 hp each. The gun turrets were American-built versions of the Boulton-Paul gun turrets and the Frazer-Nash gun turrets. A total production of 18,181 made the B-24 Liberator one of the highest produced bombers in the US aircraft industry. The arnament consisted of eleven 0.50 calibre machine guns (with three gun nose modification), plus provision for up to 8,000 Ibs (3,628 kg) of bombs. the Liberator's maximum speed was 303 mph (487 km/h). The service ceiling was 32,000 ft (9,753 m). the Liberator was retired in 1948.
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