The Air Force now has the B-61-12 tactical nuclear bomb ready for operational use on its 20 B-2 Spirit stealth bombers. Search. and -7 bombs currently in service that were built between 1979 The long, thin, flexible wings were swept back 35 degrees. Eight J-57 turbojets were slung below and ahead of the wing in four pairs. Known officially as the Stratofortress, its ungainly appearance earned the B-52 the affectionate nickname BUF (Big Ugly Fellow, in the G-rated version.) A total of 744 B-52s were built between 1952 and 1962. On 5 June, 473 B-29s struck Kobe by day and destroyed 4.35 square miles (11.3 km 2) of buildings for the loss of 11 bombers. A force of 409 B-29s attacked Osaka again on 7 June; during this attack, 2.21 square miles (5.7 km 2) of buildings were burnt out and the Americans did Three B-52s fell to the ground in flames, including two B-52Ds with the latest AN/ALT-22 jammers and one B-52G with an older AN/ALT-6B. Two bombers were hit during or after their outbound turn. Some structural changes were made to the bomber’s internal frame. But “the bones of it are still a 60-year-old airplane,” Gebara said. Each of the remaining 76 bombers was built between 1961 From the B-2 bomber’s first flight in 1989 to its first combat missions in 1999, the contents inside the bomber with the two crew members was largely a mystery; Northrop Grumman had released Perhaps as many as 100,000 Japanese were dead, almost 16 square miles of the city destroyed, and a million people homeless. Prisoners of War Not all the B-29 crews made it back safely to their B-29s carried out around 33,000 sorties with a loss rate of 1.38% which meant that about 450 aircraft were lost with all or part of their crew (how many were lost over Japan I cannot say). 11,026 fighter attacks reported over Japan. B-29s claimed 714 destroyed, 456 prob and 770 damaged DGb6Zm.