the Archangel Collection. Model B50 Upgraded Model 50 with increased takeoff weight, extra cabin windows and improved cabin heating, 139 built (40 for the US Army). Model C50 Superseded the B50; fitted with Lycoming GO-480-F1A6 engines, 155 built (one to United States Air Force). Model D50 Superseded the C50; fitted with Lycoming GO-480-G2C6 engines, 154 built (six to US Army). Model D50A Upgraded D50 fitted with GO-480-G2D6 engines, 44 built. Model D50B Upgraded D50A with new passenger steps and improved baggage area, 38 built. Model D50C Upgraded D50B with starboard airstair entry door, three rows of seats, improved air conditioning, larger baggage area, 64 built. Model D50E Upgraded D50C with extra portside window, squared-off rear starboard window, pointed nose and Lycoming GO-480-G2F6 engines, 47 built. Model E50 Supercharged version of the D50; with increased takeoff weight and supercharged GSO-480-B1B6 engines, 181 built (mostly for the US Army). Model F50 Supercharged version of the D50A with GSO-480-B1B6 engines, 26 built including one converted to G50 standard. Model G50 Supercharged version of the D50B with IGSO-480-A1A6 engines, increased fuel capacity and increased takeoff weight, one conversion from F50 plus 23 built. Model H50 Supercharged version of the D50C with increased takeoff weight and IGSO-480-A1A6 engines, 30 built. Model J50 Supercharged version of the D50E with IGSO-480-A1B6 engines and increased takeoff weight, 27 built. Excalibur 800 A modification designed originally by Swearingen Aircraft and taken over by the Excalibur Aviation Company which re-engines the Twin Bonanza with two 400 HP (298 kW) Avco Lycoming IO-720-A1A flat-eight engines in a new cowling and revised exhaust system. Other optional improvements were also available. L-23 Seminole Military version Operators Military operators Chilean Air Force (5 x C50, 4 x D-50) Colombian Air Force (1 x D50) Royal Jordanian Air Force (1 x F50) Royal Moroccan Air Force Swiss Air Force (3 x E50) Uruguayan Air Force Accidents and incidents The Beechcraft Twin Bonanza has been involved in the following notable accidents and incidents: On 24 July 1966, American professional golfer Tony Lema, his wife, and two others were killed when the aircraft struck terrain during an apparent ditching attempt in a lake near their intended destination, Lansing Municipal Airport. Specifications (D50) See also References Bridgman, Leonard. Jane's All The World's Aircraft 1956–57. New York: The McGraw-Hill Book Company, Inc., 1956. "The Royal Moroccan Air Force...A Seasoned Air Arm". Air International, November 1985, Vol. 29, No. 5.