Lockheed's experimental VTOL project. Two were built, but the design never managed vertical take-off. The project was cancelled in 1955, leaving the second aircraft (138658) incomplete without an engine. The flying prototype 138657 was donated to Hiller Aircraft for further VTOL testing, but its fate is unclear. Reliable sources say that only parts (engine and props) of this aircraft survived these tests, others say it is the aircraft that went on display in Florida in the mid 1990s, and that for reasons unknown it was painted as 138658...
Note: this design is often quoted as "XFV-1 Salmon", but it was in fact unnamed. Salmon was the name of Lockheed's test pilot for the project. Photo from: Library of Congress

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