Rotary wing aircraft provided with propulsion means, and a method applied by said aircraft

摘要: An aircraft ( 200 ) provided with a power plant 300 driving rotary wing 60 and at least one propulsion means 7, 7 ′) possessing propeller 6, 6 ′), said including engine 1, 1 having an outlet shaft 2, 2 drive train 400 in order to ). The includes coupling member 8, 8 per 4, 4 first toothed wheel 13 that are coupled together by clutch 15 main controllable freewheel 25 arranged parallel the clutch, brake 9, 9 for braking its meshing