00:00Why can helicopters without tail rotors fly so steadily?
00:03In a traditional helicopter, the main rotor spins and creates a counter torque
00:07that makes the fuselage twist in the opposite direction.
00:09The tail rotor's job is to cancel that torquey, but it doesn't create lift.
00:13It simply uses part of the engine's power to keep the aircraft balanced.
00:16A coaxial helicopter, however, solves this problem elegantly.
00:19Instead of one main rotor and a tail rotor, it uses two main rotors,
00:23one spinning clockwise, the other counterclockwise.
00:25The opposing torques cancel each other out, keeping the fuselage naturally stable.
00:29This means all of the engine's power goes into lift, with no energy wasted on a tail rotor.
00:33The result? Stronger lift, higher efficiency, and a more compact structure.
00:36By adjusting the blade angles of the two rotors,
00:38the pilot can precisely control movement forward, backward, or turning.
00:41Even in strong winds, the aircraft stays rock-solid, and it can maneuver easily in tight spaces.
00:47Because of this stability and power, coaxial helicopters are often used for heavy lift, rescue, and combat missions.
00:52Hauling cargo over mountains, hovering over ocean rescues, fighting wildfires, or performing low-altitude strikes,
00:58no tail rotor doesn't mean something's missing.
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