North American B-45 Tornado
The B-45 began development in 1944,when the U.S. War Department,called for a group of jet bombers grossing between 80,000 lb and 200,000 lb.The proposal from North American Aviation (NA-130) won,and on September 8, 1944,the company began production of three prototypes based on the NA-130.
The B-45 proved a superior design, and on January 2, 1947, a contract for immediate production of B-45As was signed,but not long after the future of the B-45 became increasingly uncertain,and in mid-1948 the U.S. Air Staff began to question its value.Soon afterwards,President Truman's budget restraints reduced Air Force expenditure and B-45 production was reduced to a total of 142 airframes.
Plagued by engine problems along with numerous other minor flaws,the B-45 regained importance when after the US entered the Korean War in 1950,it proved its value both as a bomber and as a reconnaissance aircraft.The progress of weapons technology had led to a great reduction in the weight and size of nuclear weapons in the U.S.inventory, allowing smaller aircraft to carry out nuclear strikes,a mission which had initially been confined to heavy bombers.Suddenly,the small fleet of B-45s had great value again as a nuclear deterrent.
RB-45s of the 323rd Strategic Reconnaissance Squadron began to arrive in Japan supplementing the World War II-era piston-engine RB-29s which had proved to be easy targets for North Korean MiGs.The RB-45s provided valuable intelligence throughout the remainder of the Korean War,despite the limited number of airframes available.RB-45Cs flew many daylight missions until early 1952,when they were switched to night operations after an RB-45 was almost lost to a MiG-15.
By 1954 the RB-45C had been replaced by the RB-47E.The phased-out RB-45Cs then went to the 19th Tactical Reconnaissance Squadron,which operated them until they were withdrawn from operational use in the spring of 1958.By the end of the 1950s,all B-45s had been removed from active service.However,a few continued to act as test aircraft into the early 1970s.
Under Operation Ju-jitsu,in July 1951 four aircraft were leased to Britain from the 91st SRW to form 'Special Duties Flight, Sculthorpe'.Stripped of all USAF markings and then applied with RAF markings,the four aircraft were attached to a USAF squadron based at RAF Sculthorpe,in eastern England.They were tasked with flying deep-level reconnaissance missions over the Soviet Union to gather electronic and photographic intelligence.The Special Duties Flight conducted missions during the period 1952–54.
Subsequent flights over the Soviet Union were carried out using English Electric Canberras under the codename Project Robin,operating at much higher altitudes of around 54,000 ft.
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