truss tailboom with a simple aluminum tube as the tailboom, the 269A came with the option for several models of Lycoming O-360 engines: the carbureted O-360-C2D, restricted to in the 269A, or the carbureted HO-360-B1A/B1B or fuel-injected HIO-360-B1A/B1B, all rated for in the 269A. Customers also had the option for dual controls, and a 19 gal (72 liter) auxiliary tank. The maximum weight was ; later this could be increased to if certain modifications were performed. YHO-2 Five 269A aircraft were evaluated by the U.S. Army for an observation helicopter in 1957-58, originally designated XH-42. The Army did not order the YHO-2 due to lack of funds. 269A-1 "Model 200" The 269A-1, which Hughes marketed as the Model 200, was an improved version of the 269A certified by the FAA on 23 August 1963. Powered by the fuel-injected Lycoming HIO-360-B1A or -B1B, and with its maximum weight increased to , the Model 200 also had the option for either a 30 gal (114 liter) or 25 gal (95 liter) main fuel tank. Hughes sold two versions of the Model 200: the ordinary Model 200 Utility and the Model 200 Deluxe with added custom interior decor and electrically operated trim for the cyclic control. TH-55A Military version of the 269A-1 (Model 200) built for the U.S. Army as its standard primary training helicopter and named after the Osage Native American tribe; student pilots nicknamed it the "Mattel Messerschmitt". Although basically the same as the Model 200, the TH-55A was fitted with military radio and instrumentation. 792 TH-55As were purchased by the Army between 1964 and 1967. An experimental TH-55A was fitted with an Allison 250-C18 turboshaft engine, and another would be fitted with a Wankel RC 2-60 rotary engine. TH-55J 38 license-produced versions of the TH-55A, built by Kawasaki for the Japanese Ground Self-Defense Force. 269B "Model 300" Featuring a three-seat cockpit, the 269B was powered by a 190 hp (141 kW) Lycoming HIO-360-A1A engine and was marketed as the Hughes Model 300. Optional floats were also available on the 300, the first time available on any 269-variant. 280U single-seat, utility version of the 269B with an electric clutch and trim system. The 280U could be fitted with spraying equipment for agricultural applications. 300AG 269B designed specifically for agricultural spraying with a 30 gal (114 liter) chemical tank on each side of the fuselage, and a 35 feet (10.67 m) spray