The Hughes Model 369 (US Army designation OH-6A) was an American turbine-powered light observation helicopter first flown in 1963. The Hughes Model 369 was powered by an Allsion T63-A-5A shaft-turbine engine providing a top speed of 230 kmh and a range of 673 km. The Hughes Model 369 carried a crew of two side-by-side in the front of the cabin and has folded seats behind to accommodate four fully-equipped soldiers. The Hughes Model 369 had provision for carrying an armaments package on the port side of the fuselage, comprising a twin machine-gun or XM-75 grenade launcher. Later the Hughes Model 369 was modified and produced by McDonnell Douglas as the McDonnell Douglas Model 369 OH-6 Cayuse. Research Hughes Model 369
The McDonnell Douglas Model 369 (OH-6 Cayuse) is an American utility light helicopter optimised for observation and scout roles in service since 1966 - originally as the Hughes Model 369. The OH-6 is powered by an Allison T63-A-5A turboshaft providing a top speed of 241 km and a range of 611 km. The OH-6 carries a flight crew of two and up to four passengers or 1020 lbs of freight in the cabin. Generally unarmed, provision is provided to fit a McDonnell Douglas Helicopters M27 or M8 armament package to each side of the fuselage. Research OH-6
 
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