REFLECTOR: Vibration.

[Mike Dawson]

Kurt,
Can you send that video clip to IVO? Maybe they have seen this action before. 
 
Mike
N104DD
On Friday, May 9, 2014 5:34 AM, Brian Michalk <michalk at awpi.com> wrote:
  
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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