After collapse and sale of original Lockheed (as part of Detroit Aircraft) in 1932, Allan H. Lockheed formed Alhambra, later Alcor Aircraft Corp. Built small numbers of 2 fast transports, high-wing DUO-6 and low-wing, retractable-gear C-6. Novel feature of both was 2 250-hp Menasco engines side by side in wide nose, propellers splayed out to miss each other.

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