Nose Gear Issue (Long Gospel)

[Tdeman]

Originally Posted by Discus2b

Anti-splat, $2200+ gear mods, dozens of threads, years of concerns....vs. overhauling the shimmy damper is equal to you?

Appropriate piloting technique for the aircraft being flown makes that entire list obsolete.

Originally Posted by Discus2b

...I just wonder what made them give up.

"Giving up" takes many forms. I'm not sure I'd agree that "Devoting substantial engineering, development, and testing time to new A-model nose gears, resulting in an aircraft more tolerable of pilot abuse" is one of them.

[Malndi]

Originally Posted by rvbuilder2002

Not saying that it couldn't be a bearing problem but assuming that automatically could be missing the real cause.
As already mentioned, an out of balance wheel/tire can excite a motion, but an out of round tire will as well.
That is the very first thing I would check.

I experienced the same issue as the OP. Observers confirmed the shimmy was in the vertical plane. Problem was that the Aeroclassic tubeless tyre that came with my Beringer nose wheel was out of round. Replaced it with a new Aeroclassic tubeless tyre that turned out to be even more out of round than the first one and excited a more severe shimmy. Third tyre lucky and no more shimmy. Shouldn?t have been so difficult to obtain a tyre that is round.

[TJCF16]

I had anti-splat mod my nose wheel and have never had any shimmy problems!

What I would do is.
1. Send nose wheel out to anti splat and get the mod done
2. Replace and install new squish washers on nose wheel.
3. Take lessons on how to keep stick in your lap during taxi, takeoff and landing.
4. Convert to tail dragger If all else fails

[s24789]

Here is the epilogue to the nose bounce issue. We did the following anD the problem appears to be gone.

1. Replaced the main tires. They only had about260 landing but we decided to do it.

2. Rebuilt right brake cylinder.

3. Replace brAke pads on both sides

4. Replaced both main landing gear to weldment attach bolts.

Replacing nose tire had no effect (done first)

Thanks for all the great suggestions. We will most likely do the anti splat bearing mod in the near future.

Kevin

[rvbuilder2002]

It sounds like your vibration issue was related to one of the main gear legs and not the nose gear. Some of the same influences apply there as well ( roundness and balance of tire,etc)
Glad you resolved it.

[rightrudder]

A mild shimmy is not the end of the world. I practice due diligence to dial in breakout force, maintain proper tire pressures, balance wheel/tire assemblies, etc., but sometimes the shimmy will reappear...if only slightly. I'd rather fly and enjoy my RV than spend additional time trying to eradicate it completely.

Perfection being the enemy of good enough, and all that...

And keep the weight off that nose wheel! I had a fun landing on the way back from Osh at Borger, TX. I landed on 17 well short of the FBO, so once the mains touched I added little power and carried the nose for more than a quarter mile. Good practice.

[cubdriver]

Try the berringer tubeless nose wheel mod. Has sealed bearings and helps. Also run 40-50 psi