P2010 Nose Wheel Shimmy

[wwest]

I posted this to the 2010 page but might fit better here


Good morning everyone,

I have a 2021 P2010 and recently have been having issues with a fairly pronounced shimmy in the nose wheel when I land. Its particularly noticeable when I land with a crosswind (I live in the Tx panhandle so this is pretty much every landing). I am not setting it down hard and not side loading the mains. The vibration gets worse as I slow down to the point where its shaking the whole airplane. I checked the tire pressure in the nose wheel and it is at spec so I don't think that is the issue. I have the airplane in for an annual right now and the shop is going to look into the strut while they have it. Just curious if anyone has had the same issue with a 2010? Thanks!

[Flocker]

Is the tire a tubed tire?

[wwest]

Yes its a tubed tire I believe

[Flocker]

I'd start looking there. I've heard of the tire tubes on some Tecnams getting bunched, folded, or twisted inside the tire causing exactly what you are referring to.

[Flocker]

I did a quick search and found the first thread on this:  Nose Wheel Shimmy on Landing Thread #1

[wwest]

Thanks

[nohippychicks]

Just to toss something else into the mix:

The nose wheel can shimmy if the pivot gets loose from a little wear. If you can have someone push down the tail, you can measure the force it takes to pivot the wheel when there is no weight on it; should be about 7.5 Kg. I don't have a manual in front of me, but I think the range is 6.5-8Kg for the adjustment. When it gets loose, I'll notice it when pushing the plane back by hand. It'll get more squirrely when that nut is loose, harder to steer (backwards) to where you're tying down. If this has happened and you didn't notice it and it has become even MORE loose, you can get a shimmy. You can tighten it with a small spanner wrench. A little tightening goes a long way, so go slowly.