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B-47 Stratojet

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Article Genealogy
Parent: Boeing B-52 Stratofortress Hop 3
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B-47 Stratojet was a United States Air Force (USAF) Strategic Air Command (SAC) bomber aircraft designed by Boeing and powered by General Electric jet engines. The B-47 was the first swept-wing jet bomber and was developed in the late 1940s by a team led by Edward Curtis Wells and George S. Schairer at Boeing Wichita. The aircraft's design was influenced by the Arado Ar 234 and Messerschmitt Me 262 of Luftwaffe, and it played a key role in the development of the USAF's nuclear deterrent during the Cold War, alongside the Convair B-36 Peacemaker and Northrop Grumman B-2 Spirit. The B-47's first flight was on December 17, 1947, with Robert Robbins and Scott Crossfield at the controls, and it was later flown by notable test pilots such as Chuck Yeager and Iven Kincheloe.

● Design and Development

The B-47's design was characterized by its swept-wing configuration, which was inspired by the work of Adolf Busemann and Albert Betz at the German Aerospace Center (DLR). The aircraft's wings were swept back at an angle of 35 degrees, which allowed it to achieve high speeds and improve its stability at high altitudes. The B-47 was powered by six General Electric J47 turbojet engines, which were mounted in nacelles under the wings, and it had a cruise speed of over 500 knots. The aircraft's design was also influenced by the work of NACA (now NASA) and the USAF's Wright-Patterson Air Force Base, and it was tested at the Edwards Air Force Base and the Eglin Air Force Base. The B-47's development was overseen by the USAF's Air Materiel Command and the Boeing company, with notable contributions from engineers such as George S. Schairer and Edward Curtis Wells.

● Operational History

The B-47 entered service with the USAF in 1951 and was initially assigned to the Strategic Air Command (SAC) at Offutt Air Force Base and Seymour Johnson Air Force Base. The aircraft played a key role in the Cold War, serving as a nuclear deterrent and conducting reconnaissance and electronic warfare missions. The B-47 was also used for aerial refueling and transportation missions, and it was flown by notable units such as the 306th Bombardment Wing and the 380th Bombardment Wing. The aircraft was deployed to several locations around the world, including RAF Lakenheath and RAF Brize Norton in the United Kingdom, and Morón Air Base in Spain. The B-47 was also used for test and evaluation missions, including the Operation Power Flite and the Operation Long Range, which were conducted by the USAF's Air Research and Development Command and the National Advisory Committee for Aeronautics (NACA).

● Variants

Several variants of the B-47 were developed, including the B-47A, B-47B, and B-47E. The B-47A was the initial production variant, while the B-47B was an improved version with more powerful engines and increased fuel capacity. The B-47E was a reconnaissance variant with a camera system and electronic countermeasures (ECM) equipment. Other variants included the RB-47H, which was a reconnaissance variant with a radar system, and the YB-47 and XB-47D, which were prototypes and experimental aircraft. The B-47 was also used as a testbed for several experimental aircraft, including the Boeing XB-47D and the North American Aviation XB-70 Valkyrie.

● Specifications

The B-47 had a length of 107 feet 1 inch (32.6 meters) and a wingspan of 116 feet 0 inches (35.4 meters). The aircraft had a height of 28 feet 5 inches (8.7 meters) and a gross weight of 230,000 pounds (104,545 kilograms). The B-47 was powered by six General Electric J47 turbojet engines, which produced 5,200 pounds-force (23.1 kilonewtons) of thrust each. The aircraft had a cruise speed of over 500 knots (926 kilometers per hour) and a service ceiling of 40,000 feet (12,192 meters). The B-47 was equipped with a bombsight and a navigational system, and it could carry a payload of up to 20,000 pounds (9,072 kilograms).

● Operators

The B-47 was operated by the United States Air Force (USAF) and the Royal Air Force (RAF). The aircraft was also used by several other countries, including Canada and Australia, as part of the North American Aerospace Defense Command (NORAD) and the Royal Canadian Air Force (RCAF). The B-47 was flown by several notable units, including the 306th Bombardment Wing and the 380th Bombardment Wing, and it was deployed to several locations around the world, including RAF Lakenheath and RAF Brize Norton in the United Kingdom, and Morón Air Base in Spain. The B-47 was also used for training and test and evaluation missions by the USAF's Air Training Command and the National Advisory Committee for Aeronautics (NACA). Category:Aircraft

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