Severoamerická XB-70 Valkýra

North American XB-70 Valkyrie

ZeměSPOJENÉ STÁTY
RoliStrategický bombardér – nadzvukový výzkumný letoun
První let21. září 1964
Postaven2

North American Aviation XB-70 Valkyrie byl prototypem plánovaného jaderného strategického bombardéru B-70 s hlubokým průnikem pro Velitelství strategického letectva Spojených států amerických. Navržený v pozdních 1950s Společností North American Aviation, šestimotorová Valkyrie byla schopna cestovat tisíce mil rychlostí Mach 3 + při letu ve výšce 70 000 stop (21 000 m).

Zdroj: North American XB-70 Valkyrie na Wikipedii

Severoamerická XB-70 Valkyrie Procházka kolem
FotografůJohn Heck, Vladimir Jakubov
LokalizaceNárodní muzeum USAF
Fotografie134
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The North American XB-70 Valkyrie was a prototype of a supersonic bomber aircraft that was designed and built by North American Aviation in the 1950s and 1960s. The XB-70 was intended to fly at Mach 3 (three times the speed of sound) and reach altitudes of over 70,000 feet (21,000 meters), where it would be immune to enemy interceptors and missiles. The XB-70 was also designed to use a phenomenon called compression lift, which increased its lift and reduced its drag by riding on its own shockwave.
The XB-70 was one of the most ambitious and advanced aircraft projects of its time, but it also faced many technical and political challenges. The development of the XB-70 was plagued by cost overruns, delays, design changes, and accidents. The emergence of intercontinental ballistic missiles (ICBMs) and anti-aircraft missiles also reduced the need for a high-speed bomber. As a result, the U.S. Air Force cancelled the XB-70 program in 1961, after only two prototypes were built.
The two XB-70 prototypes flew a total of 129 test flights between 1964 and 1969, demonstrating their impressive performance and capabilities. However, they also encountered several problems, such as engine failures, structural damage, and control issues. The most tragic incident occurred on June 8, 1966, when the second prototype collided with a smaller chase plane during a photo shoot and crashed, killing two of the four crew members. The first prototype survived until 1969, when it was retired and donated to the National Museum of the U.S. Air Force in Ohio.
The XB-70 Valkyrie remains one of the most iconic and influential aircraft in aviation history. It inspired many other designs, such as the B-1 Lancer, the Concorde, and the Tu-144. It also contributed to the advancement of aerospace technology and research, such as supersonic aerodynamics, materials science, propulsion systems, and flight control. The XB-70 Valkyrie was a remarkable achievement of engineering and innovation that pushed the boundaries of flight.

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