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4677th Radar Evaluation Flight
106th Radar Calibration Squadron
7th Radar Calibration Squadron
Built by Boeing as a B-29-35-MO Superfortress at the Glenn L. Martin Aircraft Plant at Bellevue, Nebraska. One of fifteen B-29s modified as a silverplate. On April 20, 1945 delivered to the U. S. Army Air Force (USAAF) as B-29-40-MO Superfortress serial number 44-27354. During May 1945, flown to Wendover Army Air Field, Utah, by its assigned crew A-5 under Lieutenant Colonel Thomas J. Classen, aircraft commander and group deputy commander. On June 29, 1945 took off from Wendover Field on a ferry flight to North Field on Tinian Island arriving on June 24, 1945.
Assigned to the 20th Air Force (20th AF), 509th Composite Group (509th CG), 393rd Bombardment Squadron (393rd BS) whose mission was to drop the first atomic bombs used in combat against Japan. Assigned victor number 10. Nicknamed "Big Stink".
On July 23, 1945 took off piloted by Colonel Paul Tibbets on a mission to drop a dummy atomic bomb assembly off Tinian to test the radar altimeter detonators. This B-29 flew twelve training missions plus two combat missions flown by Classen and crew A-5 releasing pumpkin bombs against industrial targets at Nagaoka and Hitachi. This B-29 was flown by nine of the fifteen crews assigned to the 393rd Bombardment Squadron (393rd BS).
On August 1, 1945 assigned circle R tail markings of the 6th Bombardment Group (6th BG) as a security measure with victor number 90.
On August 6, 1945 took off from North Field on Tinian piloted by 1st Lieutenant Charles McKnight and crew B-8 as a back bomber for the first atomic bomb mission. When all the bombers continued to the target without issue, this B-29 landed on Iwo Jima.
On August 9, 1945 this B-29 served as camera ship for the atomic bomb mission against Nagasaki. For the mission, this B-29 was flown by aircraft commander Major James I. Hopkins, Jr. with crew C-14, normally assigned to B-29 "Necessary Evil" plus British observers. Before take off, Dr. Robert Serber was ordered off the plane because he forgot his parachute and did not make the flight.
Afterwards, assigned to aircraft commander Captain Captain Herman S. Zahn and crew C-12. Nicknamed "Big Stink".
During April 1946 assigned to "Operation Crossroads" to conduct an air drop atomic bomb test at Bikini Atoll. Renamed "Dave's Dream" by its crew in honor of Captain David Semple, a bombardier killed in the crash of a B-29 on March 7, 1946.
On July 1, 1946, this B-29 dropped an atomic bomb code named "Gilda" during atomic bomb test "Able" at Bikini Atoll. The aim point was USS Nevada BB-36, but the missed, exploding 710 yards to the west.
This B-29 was transfered to the United States Air Force (USAF) when it formed. In June 1949 transferred to the 97th Bombardment Group at Biggs AFB. In April 1950 converted to a TB-29 by the Oklahoma City Material Area at Tinker AFB.
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