Definition

1. Noun:
   • A small, vertical rotor on the tail of a single-rotor helicopter: The tail rotor is a component that produces thrust to counteract the torque effect created by the main rotor's rotation. This prevents the helicopter's fuselage from spinning in the opposite direction.

Usage

The term "tail rotor" is used specifically in the context of aviation and helicopter mechanics. It refers to the essential component responsible for directional control and stability.

Examples

• Noun:
  • The pilot adjusted the pitch of the tail rotor to yaw the helicopter to the left.
  • A damaged tail rotor can make a helicopter uncontrollable.
  • The mechanics are inspecting the tail rotor assembly for any signs of wear.

Advanced Usage

• "to counteract torque": This is the primary function of the tail rotor. It generates lateral thrust to oppose the rotational force from the main rotor.
  • The tail rotor's thrust counteracts the torque from the main rotor, keeping the helicopter stable.

Variants and Related Words

• Anti-torque rotor (n): A technical synonym for "tail rotor," explicitly describing its function.
  • The anti-torque rotor failed, causing the helicopter to spin.
• Fenestron (n): A ducted fan tail rotor system used in some helicopter models, like those made by Airbus Helicopters.
  • The Fenestron is a quieter and safer enclosed tail rotor design.
• NOTAR (acronym): Stands for "No Tail Rotor," a helicopter system that uses directed airflow instead of a conventional tail rotor.
  • The MD Helicopters MD 520N uses the NOTAR system for anti-torque control.

Synonyms

• Anti-torque rotor: The most direct synonym, emphasizing its functional purpose.

Related Phrases

• Tail rotor authority: Refers to the effectiveness and power of the tail rotor to control the helicopter's yaw, especially in challenging conditions like strong winds.
  • The pilot was concerned about losing tail rotor authority in the high wind.
• Tail rotor strike: An incident where the tail rotor hits an object, which is a serious hazard.
  • The accident was caused by a tail rotor strike on a tree limb.

Noun

1. rotor consisting of a rotating airfoil on the tail of a single-rotor helicopter; keeps the helicopter from spinning in the direction opposite to the rotation of the main rotor