 The USAAF sent instructions to its Army Air Forces Materiel Command at Wright Field , Ohio , on 30 November 1943 , for a highly classified B @-@ 29 modification project . The Manhattan Project would deliver full @-@ sized mockups of the weapons shapes to Wright Field by mid @-@ December , where Army Air Forces Materiel Command would modify an aircraft and deliver it for use in bomb flight testing at Muroc Army Air Field in California . B @-@ 29 @-@ 5 @-@ BW 42 @-@ <unk> ( referred to as the " Pullman airplane " from an internal code name assigned it by the Engineering Division of Army Air Forces Materiel Command ) was delivered to the 468th Bombardment Group at Smoky Hill AAB , Kansas , on 30 November 1943 , and flown to Wright Field , Ohio , on 2 December . 
