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An auxiliary rotor at the tail of a helicopter designed to counterbalance the torque of the main rotor.
- ‘Absence of the tail rotor enables the helicopter to perform flat turns within the entire flight speed range.’
- ‘The tail rotor is designed on a biplane configuration, with independently controlled X-shaped blades.’
- ‘Kamov helicopters are well known for the co-axial contra-rotating rotor design, but the Ka - 60 has a single four-bladed main rotor with an anti-torque tail rotor.’
- ‘The Mi - 17, recognizable because the tail rotor is located on the starboard side instead of the port side, is a multipurpose helicopter capable of carrying either cargo in the cabin or up to 30 passengers.’
- ‘Although a helicopter has a main blade, rotating at 500 rpm above it, and a tail rotor that acts as a rudder, it remains a completely unstable machine.’
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