Lockheed D-21
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The Lockheed D-21 is an American supersonic reconnaissance drone. The D-21 was initially designed to be launched from the back of an M-21 carrier aircraft, a variant of the Lockheed A-12 aircraft. The
A D-21 on display at the United States Air Force National Museum
Rear view of the D-21 and M-21 combination on the ground, showing the exhaust shroud used on early flights
M-21 carrying D-21 in flight
A modified D-21 carried on the wing of a B-52
Lockheed A-12
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The Lockheed A-12 is a retired high-altitude, Mach 3+ reconnaissance aircraft built for the United States Central Intelligence Agency by Lockheed's Skunk Works, based on the designs of Clarence "Kelly
Lockheed D-21
…The Lockheed D-21 is an American supersonic reconnaissance drone. The D-21 was initially designed to be launched from the back of an M-21 carrier aircraft, a variant of the Lockheed A-12 aircraft. The drone had maximum speed in excess of Mach 3.3 (2,200 miles per hour; 3,600 kilometers…
A-12 aircraft, serial number 60-6932
A-11 design, March 1959
A-12 design by Lockheed Skunkworks
Lockheed A-12 pole models 1961