Excalibur Aviation Co.
Ed Swearingen returned to airplanes in 1959 by form-ing his own company, Excalibur Aviation, to produce the Swearingen Excalibur. This was a cleaned-up, re-engined modification of the Beech Twin Bonanza, and it was followed by Queen Air conversions and then the popular turboprop Merlin series.
In October 1960 Excalibur Aviation acquired all rights for conversion program (for which it already had responsibility) of Beechcraft Queen Air and Twin-Bonanza marketed by Swearingen Aircraft. Continues production at San Antonio, Texas. New company has adopted the name Queenaire 800 for former Swearingen 800.