Inside the hangar at Planes of Fame Air Museum. The sleek Duke was introduced by Beech in 1968, aimed at the owner-flown segment of the business aircraft market. It was powered by a pair of 380hp Lycoming TIO-541 six cylinder turbocharged engines driving Hartzell three-blade propellers. This Duke Model 60 was built in 1969 and is one of about 125 built. Owners found the engines expensive to overhaul and the aircraft was likened to a high-end sports car. Later models included the A60 and B60 with modified turbochargers and cabin pressurization.