One of Convair's most famous products was the ten-engined Convair B-36 strategic bomber, burning four turbojets and turning six pusher propellers driven by Pratt & Whitney R-4360 Wasp Major radial piston engines. The Convair B-36 was the largest landbased piston engined bomber in the world. The Atlas missile, the F-102 Delta Dagger and F-106 Delta Dart delta-winged interceptors, and the delta-winged B-58 Hustler supersonic intercontinental nuclear bomber were all Convair products. For a period of time in the 1960s, Convair manufactured its own line of jet commercial airliners, the Convair 880 and Convair 990 Coronado, but this did not turn out to be profitable. However, Convair found that it was profitable to be an aviation subcontractor and manufacture large subsections of airliners — such as fuselages — for the larger airliner companies, McDonnell Douglas, Boeing, and Lockheed. The Convair Division produced its own airplane designs, such as several airliners, until 1965, when it shifted from these to airframe/aerostructure subcontracting projects for other companies.