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Lockheed X-7 Flying Stove Pipe

1 - Whiplash Toggle
2 - Juno Toggle

The Lockheed X-7 (dubbed the "Flying Stove Pipe") was an American unmanned test bed of the 1950s for ramjet engines and missile guidance technology. It was the basis for the later Lockheed AQM-60 Kingfisher, a system used to test American air defenses against nuclear missile attack.

Development of the Kingfisher was first initiated in December 1946. The X-7 was called into production by the United States Air Force requirement for the development of an unmanned ramjet test plane with a top speed of at least Mach 3 (2300 mph).[1]

The X-7 project was developed under the AMC designator MX-883 and was given in the Lockheed in-house designation L-171. The L-171 was initially designated the PTV-A-1 by the USAF but was later designated the X-7 in 1951.[1] Despite its first launch being a failure, after re-development of the original ramjet, following test flights were successful.[2] A total of 130 X-7 flights were conducted from April 1951 to July 1960. - Wiki