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- When the helicopter is sitting on the ground, the friction of the wheels or skid on the ground prevents the fuselage from spinning in the opposite direction to the main rotor. But when a helicopter lifts into a hover, this friction disappears and without some form of anti-torque system, the helicopter would spin.
pilotteacher.com/why-do-helicopters-spin-out-of-control/This is Why Helicopters Spin Out of Control! – Pilot Teacher
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A helicopter may spin out of control when the anti-torque system is unable to counteract the torque being created by the engine. When the torque of the engine is greater than the thrust being produced by the anti-torque system, the helicopter will begin to spin.
Jun 5, 2019 · Normally, an extra line prevents the basket from spinning out of control, but in this case—possibly because of strong winds—the line failed, and “eventually broke,” according to Derek Geisel, the...
The Beany-Copter (trademarked 30 Aug 1961) hat by Mattel launched a circular, spinning, flying propeller which could be wound up and released from the top of the dome of a plastic hat by pulling on the chinstrap.
If the tail rotor flies off to do its own thing, there's nothing to counteract the horrible spinny force acting on the helicoprer, and it starts spinning the opposite way from the main rotor.
Because helicopters are generally dynamically unstable, deviations from a given attitude are not corrected without pilot input. Thus, frequent control inputs and corrections must be made by the pilot to keep the helicopter at a desired location and altitude.
Jan 11, 2023 · Bottom drawing: The cyclic pitch control changes the angle of selective rotor blades as they spin, so (in this case) whichever blade is on the left always produces slightly more lift, while the opposite blade (shown here on the right) always produces slightly less lift.
If this torque isn’t controlled, the helicopter would just spin round wildly out of control. So to beat the reaction of the torque, the tail rotor is used and is connected by gears and a shaft to the main rotor so that it turns whenever the main rotor is spinning.
