Later Career
In 1932, he formed Hall Aeronautical Research and Development Company, and designed and built the Hall X-1. This was a tandem wing design for which Hall held the patent. He closed this company due to financial problems, and joined Consolidated Aircraft Corporation where he was involved in the design of the B-24 Liberator bomber. He was discharged by Consolidated (then known as Convair) during the defense cutbacks following World War Two.
In 1952, he became head of the Navy's helicopter division at North Island, San Diego. He worked there in research until 1963.
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