Heavy bomber version of the bouncing bomb, was used to destroy the Mohne and Eder dams by Lancasters from the specially recruited and trained 617 Squadron, often known as the Dambusters, under Wing Commander Guy Gibson. In March and April 1945, as the war in Europe was ending, Lancasters dropped Grand Slams and Tallboys on U-boat pens and railway viaducts across north Germany. At Bielefeld more than of railway viaduct was destroyed by Grand Slams creating an earthquake effect, which shook the foundations. The Boeing B-29 Superfortress was a development of the Fortress, but a larger design with four Wright R-3350 Duplex-Cyclone
Wing leader was appointed to lead the Vampire wing at RAF Fassberg in 1951. RAF Bomber Command also appointed wing leaders during the early Cold War period, although the title was modified to wing commander (operations) and the role encompassed training as well as air operations. The position of wing commander (flying) was still in use in the RAF in the early 1960s. Wing leader Wing leader, or wing commander (flying), denotes the tactical commander of a Commonwealth military wing on flying operations. The terms refer to a position, not a rank, although the role was usually taken by an officer ranked