All 3 volumes of this profile of American aviation. 'B-29 Superfortress' is a profile of the Boeing B-29 Superfortress, the first bomber with pressurised crew compartments, which was designed in 1940 to replace the B-17 and B-24. Following its maiden flight in September 1942 the B-29 was assigned to the Pacific arena, going into action against Japan in the last two months of 1944. In August 1945 it was the B-29s Enola Gay and Bock's Car which dropped the first atomic weapons on Hiroshima and Nagasaki. 'The Chance Vought F4U Corsair' shows the combat aircraft originally deemed too dangerous to use in carrier-based operations by the United States Navy and consequently lent to the British Fleet Air Arm. The US eventually adopted the Corsair in 1944, and by the time it served in the Korean war it had come to be regarded as one of the finest combat aircraft in history. Whilst 'The Republic P-47 Thunderbolt' profiles the aircraft nicknamed 'The Unbreakable' by those who flew it. Prototype Thunderbolts took to the skies in May 1941, with improved versions in action by mid-1943. These were followed by the P-47D, 9-47G and 9-47M, which could attain speeds of 470 mph. Eventually the XP-47J made it up to 504 mph, although this model never went into production; those that did partook in over 546,000 combat sorties over the course of World War Two.