Definition

Noun: * The central supporting axis of a main rotor: The rotor shaft is the central, rotating mechanical component that transmits power from the helicopter's engine to the main rotor hub, causing the rotor blades to turn.

Usage

The term rotor shaft is used specifically in the context of helicopter mechanics and aeronautical engineering to describe a core part of the rotor drive system. * During the inspection, the engineers checked the rotor shaft for any signs of metal fatigue. * The helicopter was grounded because of a crack discovered in the main rotor shaft.

Advanced Usage

• Technical Specifications: In technical manuals, the is often discussed in terms of its material composition, torque capacity, and maintenance intervals.
  • The maintenance schedule requires a non-destructive test of the rotor shaft every 1,000 flight hours.

Variants and Related Words

• Main rotor shaft: A more explicit variant of the term.
• Rotor mast: A common synonym in aviation terminology, often used interchangeably with .
• Drive shaft: A more general term for a rotating shaft that transmits torque; the is a specific type of drive shaft in a helicopter.

Synonyms

• Rotor mast
• Main shaft

Related Phrases

• Rotor head assembly: The group of components, including the , hub, and hinges, that connect the rotor blades to the helicopter.
• Transmission system: The system of gears and shafts, which includes the , that delivers engine power to the rotors.

Noun

1. the axis around which the major rotor of a helicopter turns