HERE'S AN INTERESTING PHOTO OF THE XB-70 VALKYRIE MACH 3 BOMBER WINDSCREEN ASSEMBLY IN SUPERSONIC FLIGHT CONFIGURATION

HERE’S AN INTERESTING PHOTO OF THE XB-70 VALKYRIE MACH 3 BOMBER WINDSCREEN ASSEMBLY IN SUPERSONIC FLIGHT CONFIGURATION

By Dario Leone
Feb 14 2017
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XB-70 Valkyrie windscreen

The interesting image in this post is is a close-up photo of an XB-70 Valkyrie taken from a chase plane.

The XB-70 had a movable windshield and ramp. These were raised during supersonic flight to reduce drag. When the pilot was ready to land, he lowered the assembly to give both him and his copilot a clear view of the runway.

The futuristic XB-70A was originally conceived in the 1950s as a high-altitude, nuclear strike bomber that could fly at Mach 3 (three times the speed of sound) — any potential enemy would have been unable to defend against such a bomber.

By the early 1960s, however, new Surface-to-Air Missiles (SAMs) threatened the survivability of high-speed, high-altitude bombers. Less costly, nuclear-armed ICBMs (Intercontinental Ballistic Missiles) were also entering service. As a result, in 1961, the expensive B-70 bomber program was canceled before any Valkyries had been completed or flown. The XB-70 Valkyrie never went into production and instead was used for flight research involving the U.S. Air Force (USAF) and NASA‘s Flight Research Center (FRC), which was a predecessor of today’s NASA Dryden Flight Research Center.

The world’s largest experimental aircraft

The XB-70 was the world’s largest experimental aircraft. It was capable of flight at speeds of three times the speed of sound (roughly 2,000 miles per hour) at altitudes of 70,000 feet. It was used to collect in-flight information for use in the design of future supersonic aircraft, military and civilian. The major objectives of the XB-70 flight research program were to study the airplane’s stability and handling characteristics, to evaluate its response to atmospheric turbulence, and to determine the aerodynamic and propulsion performance. In addition there were secondary objectives to measure the noise and friction associated with airflow over the airplane and to determine the levels and extent of the engine noise during takeoff, landing, and ground operations.

Source: NASA; Photo credit: NASA


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Dario Leone

Dario Leone

Dario Leone is an aviation, defense and military writer. He is the Founder and Editor of “The Aviation Geek Club” one of the world’s most read military aviation blogs. His writing has appeared in The National Interest and other news media. He has reported from Europe and flown Super Puma and Cougar helicopters with the Swiss Air Force.
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