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North American XB-70 Valkyrie



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Specifications

         Primary Function:
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         Weight Empty:
         Max. Weight:
         Length:
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         Cruise Speed:
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research
two
6/ 28,000 lbs. ea.
210,000 lbs.
550,000 lbs.
185 ft. 10 in.
105 ft.
2,000 mph
2,056 mph
27,450 fpm
77,350 feet
4,300 miles
9/21/64






North American XB-70 Valkyrie
North American XB-70 Valkyrie
Click on the picture to hear the wav sound.


North American XB-70 Valkyrie aircraft, that would fly at high altitudes at Mach 3, were conceived in principle in the 1950s.

The North American XB-70 Valkyrie was built from titanium and stainless steel honeycomb panels. Its design took advantage of "compression lift." Compression lift occurs as the aircraft is increasingly supported by its own sonic shock wave as speed increases. The aircraft had the ability to lower their wing tips up to 65 degrees to add high speed stability.

In 1955 the North American XB-70 Valkyrie design was originated.

In December of 1957 a contract for the development of the North American XB-70 Valkyrie was awarded.

In December of 1959 the USAF reduced the development program to a single North American XB-70 Valkyrie prototype.

In July of 1960 funding for the program was restored with an anticipated production of 12 aircraft.

On March 1, 1961, the program was reduced to two North American XB-70 Valkyrie non-operational prototypes and one operational prototype.

On September 21, 1964 the first North American XB-70 Valkyrie prototype took to the sky.

On July 17, 1965 the second prototype flew for the first time.

Missions of the North American XB-70 Valkyrie, both to and from the target, were to be flown at Mach 3 speeds and at very high altitudes.

With the advent of high flying, accurate, surface to air missiles, it was believed that even at such high speeds and altitudes, the North American XB-70 Valkyrie, due to its lack of maneuverability, would be vulnerable. Another consideration was the large radar and exhaust signature of the aircraft. Its delta wing design did not allow for efficient low level flight.

The North American XB-70 Valkyrie carried all of its weapons internally to keep drag to a minimum while enabling Mach 3 flight. Its fuel capacity was similar to conventional bombers, but its range was about half as far.

On May 1, 1960, the USAF decided to change the mission of the North American XB-70 Valkyrie from reconnaissance-strike to advanced high speed aerodynamic research.

The first North American XB-70 Valkyrie had weaknesses in the honey comb construction, hydraulic leaks, and landing gear difficulties.

The second aircraft, flying for the first time on July 17, 1965, had resolved most of these problems.

During a photo shoot on June 8, 1966, the second North American XB-70 Valkyrie prototype collided with a chase plane. Both aircraft were lost.

The first North American XB-70 Valkyrie prototype made a total of 83 flights before being retired on Feb. 4, 1969.



North American XB-70 Valkyrie
North American XB-70 Valkyrie


Pictured above and immediately below is the North American XB-70 Valkyrie scratch built by Steve Manganelli. Wingspan is 36" and length is 58". Steve powers it with 3 x Wemotec mini fans. Weight is 85 oz.


North American XB-70 Valkyrie


North American XB-70 Valkyrie

Pictured above and below is the fantastic North American XB-70 Valkyrie built by Jim of RC Groups. It weighs about 30 lbs. Wingspan is 67". The length is 111" and power is from 4 x HW 730's.


North American XB-70 Valkyrie.


North American XB-70 Valkyrie

The final picture is of the North American XB-70 Valkyrie by Easytiger. It comes as a ARF or RTF including motor, EDF unit, and retractable landing gear. Wingspan is 31 1/2", length is 51", and weight is about 29 oz.

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