 Seventeen production Silverplate aircraft were ordered in August 1944 to allow the 509th Composite Group to train with the type of aircraft they would have to fly in combat , and for the 216th Army Air Forces Base Unit to test bomb configurations . These were followed by 28 more aircraft that were ordered in February 1945 for operational use by the 509th Composite Group . This batch included the aircraft which carried out the atomic bombing of Hiroshima and Nagasaki in August 1945 . Including the Pullman B @-@ 29 , a total of 46 Silverplate B @-@ 29s were produced during and after World War II . An additional 19 Silverplate B @-@ 29s were ordered in July 1945 , which were delivered between the end of the war and the end of 1947 . Thus , a total of 65 Silverplate B @-@ 29s were made . 
