Yeah the plastic spinner nonsense.... sigh...


Spinner nuts have their place, but full spinner cones are more aerodynamically efficient and scale like.


kapSidEm:

As Jester_s1 mentioned it may be a mounting issue.

Most spinners come with extra adjustment "rings" that put the back plate in place perfectly centered.

If the spinner you are using came from another plane then, it is very likely you are not using the correct ring for the prop shaft width.

The prop shaft and the spinner center should have a very snug fit, so the backplate cannot move out of center.

If that is the case, all is good.

You then have to make sure that you EVENLY tigten the spinner screws.

All too often newbies will tighten them down unevenly or WAAY too tight.

The spinner screws should force the cone onto the backplate completely with just a bit of extra strength. DO NOT grind them down tightly.

If you overtigten the screws you'll deform or crack the backplate or cone... causing the spinner tip to wobble around center.
If you've not overdone things, try loosening the screws and retighten them EVENLY. That may fix the problem.




This is what causes the "explosions" Jaka is referring to erroneously as being soley endemic to plastic.

Overtighten an aluminum or metal spinner/backplate and the same thing will happen to it! Kaboom!! at high RPM's.

But this more the fault or inexperience of the installer/pilot not the spinner materials themselves.