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Helicopters spin out of control when an issue arises from the anti-torque system on the helicopter. Be it a mechanical failure, the pilot hits something or the helicopter is being operated in conditions that can lead to the onset of it losing its effectiveness.
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...
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.
Dec 11, 2019 · It was later determined that the unrecoverable flat spin was caused by the execessive angle of attack that “was not necessarily pilot input but a gyroscopic condition set up by engine...
The tail rotor provides yaw / heading control and prevents a helicopter from spinning out of control, particularly at low speeds. Unfortunately, there are a few phenomena that can reduce tail rotor thrust in exactly these low speed conditions where it’s most needed.
Mar 14, 2014 · All helicopters that I'm aware of are capable of autorotation. In an autorotation, the pilot uses the air rushing up through the rotor disk to keep the blades spinning. This involves changing the collective angle of attack of the blades to near zero to minimize drag, plus some other control inputs.
That is the reason why helicopters have tail rotors. It transfers the angular momentum from the accelerating rotor into the air flowing over the tail. Without the tail rotor the helicopter will start spinning out of control.
