Beginning with the tender of the contract in June 1946, the design of the B-52 evolved from a straight wing airplane powered by six turboprop engines to the final prototype YB-52 with eight turbojet engines and swept wings.
ເລີ່ມຕົ້ນດ້ວຍການສະເຫນີລາຄາສັນຍາສົບຜົນສໍາເລັດໃນເດືອນມິຖຸ 1946, ການອອກແບບ B-52 ການພັດທະນາຈາກເຮືອບິນປີກຊື່ powered by ຫົກເຄື່ອງຈັກ turboprop ການສຸດທ້າຍ prototype YB-52 ມີແປດເຄື່ອງຈັກ turbojet ແລະ swept ປີກ.