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| Subject: Wheel shimmy | |
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Author: Rob F |
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Date Posted: Fri, Nov 07 2014, 22:20:34 GMT In reply to: Matthew Gregory 's message, "Nose wheel shimmy" on Thu, Nov 06 2014, 19:39:00 GMT Hi Matthew. You need to increase the static friction in the nosewheel pivot to prevent shimmy. On the original design, there are two conical washers above and below the alloy nosewheel casting. These provide a clamping force on the casting and this friction level is most important. It may be that your conical washers have worn and are not working as intended. If they are worn then they need to be replaced. It might be just that the noseleg casting nut requires a small increase in torque to increase friction. With the wheel held off the ground (with someone holding the tail down for a moment) and holding the rear of the spat, you should need to apply around 3 to 5 lbs break out force to overcome the friction and move the nosewheel from side to side. It does need to be quite stiff! It might be prudent to drop the wheel casting off, thoroughly inspect the large bolt that the nosewheel casting hangs on, and check it for straightness and ideally perform a dye-penetrant check for cracks. Re-assemble with new washers and well greased, it should be fine. [ Next Thread | Previous Thread | Next Message | Previous Message ] |
| Subject | Author | Date |
| Nose wheel shimmy | Alan Gill | Mon, Nov 17 2014, 17:26:47 GMT |