Engineer Alfred Verville left the US Army Air Service and joined the Buhl Aircraft Company where he designed the Airster three-seat open biplane. The CA-3A model had the distinction of receiving the first US type certificate, Approved Type Certificate 1. This example took part in the 1927 New York - Spokane Air Derby, flown by Nick Mamer. The National Air Races were held in Spokane, Washington, that year.
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