shimmy dampers

shimmy dampers
A small hydraulic or pneumatic shock absorber installed between the nose-wheel fork and landing gear structure to prevent or minimize nosewheel shimmying during takeoff and landing. It is more typically found on nose-wheels than on tail-wheels. Also known as friction dampers, as they use friction to damp the oscillations.
A shimmy damper consists of an oil filled cylinder, with a push–pull rod attached to a disk inside the cylinder. When the push rod moves from side to side, oil is forced to flow through the holes, which acts a damper.

Aviation dictionary. 2014.

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Look at other dictionaries:

  • shimmying — A tendency of the tail or nosewheel assembly to oscillate violently and rapidly from side to side while taking off, landing, or taxiing. Friction dampers (also called shimmy dampers) normally are provided to prevent shimmying …   Aviation dictionary

  • dashpot — A mechanical, hydraulic, or pneumatic damper used to cushion or slow down mechanical movement by restricting the flow of viscous fluid. Dashpots are used in shimmy dampers and in some power control systems, where they come into operation at high… …   Aviation dictionary

  • Bicycle and motorcycle dynamics — A computer generated, simplified model of bike and rider demonstrating an uncontrolled right turn. An …   Wikipedia

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