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The American supersonic transport (SST) program.However, on June 8, 1966, XB-70 62-207 was involved in an incident, when it collided with a civilian-registered F-104N during a General Electric company publicity photo shoot over Barstow, California, near the Edwards Air Force Base test range in the Mojave Desert. The aircraft were flying in formation with a T-38 Talon, an F-4B Phantom II, and a YF-5A Freedom Fighter.As explained in a previous post here at The Aviationist:Towards the end of the photo shooting NASA registered F-104N Starfighter, piloted by famous test pilot Joe Walker, got too close to the right wing of the XB-70, collided, sheared off the twin vertical stabilizers of the big XB-70 and exploded as it cartwheeled behind the Valkyrie. North American test pilot Al White ejected from the XB-70 in his escape capsule, but received serious injuries in the process. Co-pilot Maj. Carl Cross, who was making his first flight in the XB-70, was unable to eject and died in the crash.The root cause of the incident was found to be wake turbulence: wake vortices spinning off the XB-70’s wingtip caused Walker’s F-104N to roll, colliding with the right wingtip of the huge XB-70 and breaking apart. As explained in details in this post, wingtip vortices form because of the difference in pressure between the upper and lower surfaces of a wing. When the air leaves the trailing edge of the wing, the air stream from the upper surface is inclined to that from the lower surface, and

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The XB-70 Valkyrie on display at the Air Force Museum was once again towed out of its display hangar temporarily for museum maintenance recently.The North American XB-70 Valkyrie, on display along with over 25 others in the Research and Development Gallery at the National Museum of the USAF at Wright-Patterson AFB in Dayton, Ohio, was moved out of the fourth hangar and even got a wash on May 28, 2024.The XB-70 Valkyrie on display at the Air Force Museum was once again towed out of its display hangar temporarily for museum maintenance recently.The XB-70 ValkyrieThis is the second time in less than four years that the Air Force museum undertakes the move of the massive super bomber for maintenance. And, once again, the museum’s media team captured amazing footage of the stunning aircraft being carefully towed outside.The one on display at the National Museum of the U.S. Air Force at Wright-Patterson AFB in Dayton is the only remaining XB-70 Valkyrie super bomber.The XB-70 ValkyrieThe North American XB-70 Valkyrie was the most ambitious super-bomber project of the Cold War. This enormous six-engine bomber was intended to be the ultimate American high-altitude, high-speed, deep-penetration manned nuclear bomber, designed to fly high and fast enough to evade Soviet interceptors.Originally designed to be a Mach 3 bomber, the XB-70A never entered production.The XB-70 was the world’s largest experimental aircraft, capable of flying at speeds up to Mach 3 (approximately 2,000 miles per hour) at altitudes of 70,000 feet. The XB-70 measured about 186 feet

Helical paths, or vortices, result. The vortex is strongest at the tips and decreasing rapidly to zero nearing midspan: at a short distance from the trailing edge downstream, the vortices roll up and combine into two distinct cylindrical vortices that constitute the “tip vortices.The pilot of the XB-70 ejected and landed serious injured. The co-pilot of the XB-70A and the pilot of the Starfighter were killed.The incident is one of the most famous and tragic accidents in military aviation as there are photographs of the mid-air collision.North American XB-70A Valkyrie just after collision. Note the F-104 is at the forward edge of the fireball and most of both XB-70A vertical stabilizers are gone. (U.S. Air Force photo)The XB-70 Valkyrie plummets to its death near Edwards AFB in .(Photo: USAF)Moments after the XB-70 crashed. (USAF)Research activities continued with the first prototype, with NASA’s first flight on April 25, 1967, and the last flight on February 4, 1969. During its career the XB-70 collected in-flight data to aid the design of future supersonic aircraft, both military and civilian. The main goals of the Valkyrie flight research program included studying the plane’s stability and handling characteristics, evaluating its response to atmospheric turbulence, and assessing its aerodynamic and propulsion performance. Secondary objectives involved measuring noise and friction from airflow over the airplane and determining engine noise levels during takeoff, landing, and ground operations.This photo shows the XB-70A parked on a ramp at Edwards Air Force Base in 1967.