 On 22 August 1944 , to meet the requirements of the USAAF group about to be formed to train in the atomic mission , a production phase of Silverplate B @-@ 29s was ordered from the Glenn L. Martin Company 's modification center at Omaha , Nebraska under the designation Project 98146 @-@ S. The first three of these second increment Silverplate B @-@ 29s were delivered to the USAAF in mid @-@ October , and flown to Wendover . They were fitted with British single @-@ point bomb releases mounted on a re @-@ designed H @-@ frame suspension rack fitted in the forward bomb bay , so that additional fuel tanks could be carried in the aft bay . A new crew position , called the " weaponeer station " , was created in the cockpit with a panel to monitor the release and detonation of the bomb during the actual combat drops . Fourteen production aircraft were assigned to the 393d Bombardment Squadron for training , and three to the 216th Army Air Force Base Unit for bomb drop testing . 
