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Boeing B-29 Superfortress ‘Bockscar’, 393rd Bombardment Squadron, 509th Composite Group with atomic bomb „Fat Man“

TYPE: High-altitude strategic bomber


POWER PLANT: Four Wright R-3350-57 Cyclone turbo-supercharged radials, rated at 2,200 hp each


COMMENT: The Boeing B-29 Superfortress was an American four-engined propeller-driven heavy bomber, designed by Boeing and flown primarily by the United States during World War II and the Korean War. Named in allusion to its predecessor, the Boeing B-17 Flying Fortress, the Superfortress was designed for high-altitude strategic bombing, but also excelled in low-altitude night incendiary bombing, and in dropping naval mines to blockade Japan. B-29s dropped the atomic bombs on Hiroshima and Nagasaki, the only aircraft ever to drop nuclear weapons in combat.

Preface of the following three posts

The following three posts show pictures of  the famous aircraft Boeing B-29 Superfortress (Model number B-29-36-MO, Serial number 44-27297, Victor number # 7, (squadron-assigned identification))  – later known as Bocks Car – that dropped the second atomic bomb Fat Man on Nagasaki on 9th August 1945.

Post I shows the B-29 when it arrived from Wendover Army Air Field, Utah, to North Field, Tinian, Marianas on June 1945. The aircraft was flown by aircraft Captain Frederick C. Bock and crew C-13. At that time the tail marking was that of the 393rd BS, Heavy, 509th Composite Group, a circle outline (denoting the 313th Wing) around an arrowhead pointing forward. The aircrafts Victor number was # 7 and the ship lacked of any nose art.

Boeing B-29 Superfortress ‘Bockscar’, 393rd Bombardment Squadron, 509th Composite Group. Before the Nagasaki Mission

Post II shows the same aircraft at the beginning of August 1945. The aircrafts tail markings were repainted with a triangle N of the 444th Bombardment Group, XXI Bomber Command groups as a security measure. It was feared that Japanese survivors on Tinian were reporting the 509th’s activities to Tokyo by clandestine radio. The Victor (identification assigned by the squadron) numbers previously assigned the 393d aircraft were changed number # 77 to avoid confusion with an actual 444th B-29.

Although all of the B-29s involved in the Hiroshima- and Nagasake-Mission were named, the only nose art applied to the aircraft before the atomic bomb missions was that of Enola Gay. With some exceptions, the others were applied some time in August 1945

Boeing B-29 Superfortress “Bocks Car”, 393rd BS, Heavy, 509th Composite Group. Strike on Nagasaki

Post III shows the Bocks Car after the Nagasaki strike. The triangle N tail marking of the 444th  Bombardment Group was changed back to that of the 509th Composite Group, circle outline around an arrowhead pointing forward. The Victor # 77 and remained unchanged while the nose art was finally applied.

Boeing B-29 Superfortress “Bocks Car”, 393rd BS, Heavy, 509th Composite Group. After the Nagasaki Mission