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A torsion link assembly is installed on the landing gear to:
  • A
    absorb the spring energy.
  • B
    provide damping of the vertical motion during touch-down.
  • C
    lock the landing gear.
  • D
    avoid rotation of the piston rod relative to the fixed part of the oleo strut.

Refer to figure.

Most oleo struts are equipped with a Torsion Link which connects the upper cylinder and lower piston to prevent rotation of the inner piston rod within the cylinder and to maintain alignment of the wheel.

The integrity of this component is essential to prevent wheel shimmy vibrations in an aircraft landing gear (during ground taxi).

Failure of this component is thus catastrophic for the aircraft.

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