He retired in 1980 and moved to Carmel, California. In his retirement he invented, tested, and patented the Beachbuilder system of beach erosion prevention. Beardsley died 26 November1998.
References
"Jet-Age Boat Tested on Bay" from The Evening Star (Washington, DC), 4 August 1961
"Amphibian Vehicle Riding on Air Cushion is Shown" in Baltimore Sun 3 August 1961.
"Craft is Designed for Cushion-Air (sic) Trip to World's Fair" from the New York Times, 15 June 1962.
"'The Little Skimmer' from Fairwinds: Unique Amphibious Vehicle Rides on Cushion of Air, Goes About 20 MPH" from The Maryland Gazette 10 December 1964.