REFLECTOR: Vibration.

[Brian Michalk]

Mike Deeter had a blade tracking issue and vibration problem as well.

In his door open event, a blade was damaged, which he replaced with a 
new one from IVO.  IVO said it matched his other blades, but the problem 
was that the root thickness where it's clamped was thicker than the 
other two blades.  This puts the acme rod and motor in a bind and can 
lead to galling of the aluminum-steel bearing surfaces.

We finally convinced IVO that this was a problem.  He sent back all 
three blades insisting that they make them the same.  I think IVO sent 
back three new blades.  The tracking and vibration problem went away.

Mike's tracking error was on the order of .5" max.  Yours looks much 
worse.  You should easily be able to see some gaps in your warped crush 
plate.

On 05/09/2014 12:18 AM, Kurt Winker wrote:
> Looking for input. Engine ran fine w-out the prop. Started it with the 
> prop....wicked vibration.
> Took prop off.. Vibration gone.
> Sent prop back to IVO....1-blade was 1-gram out of balance.  They 
> corrected & returned.
> Since I noticed that, when viewed from the side, the blade disk 
> tracking seemed to move for & aft when you looked at the top of the disk.
> When I got the blades back, I reassembled & reinstalled. Then I 
> checked the blade tracking. Was off a tad, and I corrected that. Also 
> checked the blade angle with a protractor, and all seemed good.
> Looking for things to check.
> Engine: 4.3l- V6 90-degree engine...
> Belt drive reduction unit:  1.7:1 ratio.
> 76"- 3-blade.
>
> The fact that the blade track for-aft seems to change, really gets my 
> attention.
> Changing RPM doesn't help...the vibration increases in frequency with 
> rpm, but no better or worse.
> Changing the prop pitch has no effect.
>
> All else is well.... Hope I can figure this part out.
>
> View from the side: http://m.youtube.com/watch?v=Nr-KLXgco38.
>
>
> Kurt
>
> Sent from my iPad
>
>
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