 Originally the name for the aircraft modification project for the B @-@ 29 to enable it to drop a nuclear weapon , Silverplate eventually came to identify the training and operational aspects of the program as well . The airplane modification project fell under the purview of the Manhattan Project 's Project Alberta after March 1945 . The original codename for the project was " Silver Plated " but continued usage of the term shortened it to the one word " Silverplate " . For security reasons , the codename " Silverplate " was not officially registered . Confusion then resulted when the War Department allocated " Silverplate " to another project . Arnold 's office had to order the other agency to discontinue its use of the codename . 
