What is the purpose of shimmy damper?

The shimmy damper is a hydraulic fluid-filled cylinder that prevents rapid movement of the nose or main landing gear without interfering with slower operations.

What causes nose wheel shimmy?

An imbalance in the nose tire and wheel assembly can cause a vibration in the nosegear. Uneven tire wear can also cause nose vibrations. An overly inflated nose tire can also contribute to a nosewheel shimmy. A damper that is low on fluid or is excessively worn internally will most assuredly result in a nose shimmy.

What is landing gear shimmy?

What is landing gear shimmy? It is an oscillation of the landing gear that can occur when the structural vibrations couple with the tyre forces and when this happens, the landing gear will experience a prolonged lateral and torsional motion (think of that annoying trolley wheel at the supermarket!).

What is a vane type shimmy damper?

A vane-type shimmy damper is sometime used. [Figure 6] It uses fluid chambers created by the vanes separated by a valve orifice in a center shaft. As the nose gear tries to oscillate, vanes rotate to change the size of internal chambers filled with fluid.

What is shimmy damper for airplane landing gear?

6 Claims. This’invention relates to a shimmy damper for airplane landing gear particularly adapted for use in connection with the nose wheel of tricycle landing gear or the like. I This shimmy damper is more particularly adapted for use in connection with nose wheels of airplanes which must \\be turned a considerable degree in each direction.

What does a shimmy damper do on a Parker?

Create one account to manage everything you do with Parker, from your shopping preferences to your application access. The shimmy damper is a hydraulic fluid-filled cylinder that prevents rapid movement of the nose or main landing gear without interfering with slower operations.

Where is the shimmy damper rod on a Cessna Flyer?

The steering collar roller bearing rides on the strut housing as it is steered back and forth. The lower section of the strut housing. The tabs on the left and right provide the stops for the nose steering travel; the left tab also is the attachment point for the shimmy damper rod.

Can a steering collar be replaced with Shimmy dampers?

The steering collar is one point of continued wear and any free play in the needle bearings is cause for replacement. Some play can be taken up in this area with special shims of varying thickness supplied by Cessna for this purpose.