The Boeing XB -59, Boeing's model number 701, was a proposal for a supersonic bomber of the United States Air Force from the 1950s.
In 1949, the U.S. government dropped the Boeing XB -55 contract, which had the goal to create a subsonic fast replacement for the recently launched Boeing B-47 Stratojet. The XB -55 project had been launched in 1947, but at the end of the decade it was obvious that a strategic bomber can only successfully penetrate enemy airspace if it is significantly faster than the enemy interceptors then in service standing. The deletion of the XB -55 project funds were released for design studies of a moderate supersonic bomber. Subsequently, several aircraft manufacturers were invited to submit drafts
Boeing's design called for a four-engine high-wing monoplane with streamlined fuselage. The four engines should be housed in pairs side by side in the thickened surface roots. The wings should converge strongly towards the ends. The design called for a maximum speed of Mach 2.
As a weapon system MX- 1965, the XB -59 should have a three-person crew and be powered by four J73 - GE - X24A - or Pratt & Whitney J57 jet engines. You should, like the Boeing B-47 Stratojet and receive the Boeing B -52 Stratofortress, a tandem chassis with training wheels at the wingtips.
The contract with Boeing for the XB -59 was canceled in late 1952, as it had looked at the draft, especially in the supersonic flight performance over the Convair B-58 Hustler as inferior. The Boeing XB -59 therefore remained a design study and has not been built.