This video shows how a helicopter drive system transfers power from the high speed output of a gas turbine engine to a helicopter's rotors 00:00 Intro 01:15 Engines 02:10 High Speed Shafts 02:36 Freewheeling Units 03:32 Combining Gear 03:52 Bevel Gear 04:37 Planetary Gear 05:26 Tail Rotor Gears 06:05 Tail Rotor Drive Shaft 06:24 Intermediate Gears 06:48 Tail Rotor Gears
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