Retrofit Landing Gear: Vibration Theory

I've spent almost a year now flying (or at least TRYING to fly) a FP Pic, & have developed a theory on landing gears using wire, specifically MIA's Retrofit landing gear. For many months now, my Pic has had a vibration issue I simply COULD NOT solve. Each time she hovered, the landing gear always shook to a degree. It got me to thinking on Physics, it seems to me that the centrifigal force of the main rotor manifests/resonates in the wire struts, creating a vibration syndrome that can be hard to diagnose.

Does anyone agree with me? That wire struts do not absorb vibration like CF struts, but actually amplify vibration?

Or do I just suck at trimming? [img]/ubbthreads/images/graemlins/grin.gif[/img]

Lee

Yep i,d say your metal lg is amplifying a vibration from another part of the chopper.i like to look at my aerial wire as the last source of detectable vibration.you can fly with some vibes but for some to find the last vibration is to be satisfied with the last beer.however being drunk and trying to cure vibration is not a good mix.
Hold the frame and feel the buzz.

>>It got me to thinking on Physics, it seems to me that the centrifigal force of the main rotor manifests/resonates in the wire struts, creating a vibration syndrome that can be hard to diagnose.<<

Sorry, it was a good try on the theory but not quite. [img]/ubbthreads/images/graemlins/grin.gif[/img]

The reason why you have a shaking landing gear is because your rotor head is out of whack somewhere.

Somethings to check:

1) Flybar length equal on both sides.
2) Flybar paddle balanced to less than 0.1 gram.
3) Blades have the same CG location.
4) Blades have the same weight to within 0.1 gram.
5) Main shaft perfectly true and straight.
6) Blades in perfect tracking.

Once you get all those items down then your landing will not shake at all.

[spooky]

Hi, I am also using wire landing gear for almost a year now, and I don´t have the problem you mention. It is true that mine is attached elastically: hot melt glue in the front, and a plastic strap on the rear. Also, I would first of all take out the rotor and test. Then just with the flybar (no paddles or blades), and so on.
Good luck!