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  #31  
Old 08-06-2021, 06:38 PM
DickB DickB is offline
 
Join Date: Nov 2015
Location: Williamsburg, VA
Posts: 14
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I'm getting ready to do the prop balance. The mechanic that is going to do this has a DynaVibe. He has done several Lycomings and Continentals, but not a Rotax. I just observed him doing a Lycoming. There was a convenient bolt in the top of the case to mount the accelerometer.
I have not removed my top cowl yet, but trying to remember the layout. Is there a good place to mount the pickup and accelerometer? Or better yet, how have you guys done it?
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  #32  
Old 08-06-2021, 06:46 PM
Bob Y Bob Y is offline
 
Join Date: Jul 2017
Location: Piedmont, SC
Posts: 426
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See DynaVibe brochure for the Rotax.

https://www.dropbox.com/s/53qbtnzvkx...20912.pdf?dl=0
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N569TT first flight 2/9/2020
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Last edited by Bob Y : 08-06-2021 at 06:48 PM.
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  #33  
Old 08-06-2021, 11:43 PM
seagull seagull is offline
 
Join Date: Dec 2019
Location: Highland, CA
Posts: 537
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Quote:
Originally Posted by DickB View Post
Is there a good place to mount the pickup and accelerometer? Or better yet, how have you guys done it?
I have the Dynavibe GX3, this is how I mount it.

Click image for larger version

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  #34  
Old 08-07-2021, 03:22 PM
431HG 431HG is offline
 
Join Date: Aug 2010
Location: Southbury, CT
Posts: 8
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Getting ready to balance prop, my mechanic uses Chadwick Helmuth equipment and has no RV-12 prop balance experience. Can anyone share photo of equipment mounting and Chadwick experience I can share with him prior to work?
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  #35  
Old 08-07-2021, 03:27 PM
DickB DickB is offline
 
Join Date: Nov 2015
Location: Williamsburg, VA
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Thanks Bob & Walt .. exactly the info I was looking for.
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  #36  
Old 08-07-2021, 03:53 PM
seagull seagull is offline
 
Join Date: Dec 2019
Location: Highland, CA
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Quote:
Originally Posted by 431HG View Post
Getting ready to balance prop, my mechanic uses Chadwick Helmuth equipment and has no RV-12 prop balance experience. Can anyone share photo of equipment mounting and Chadwick experience I can share with him prior to work?
The Chadwick is going to mount the same as the Dynovibe, mount the accelerometer as close to the prop as possible and the optical sensor 6 - 12” back from the prop close to 12 o’clock.
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Live as if you were to die tomorrow. Learn as if you were to live forever.
visit my blog - http://waltsrv12.com
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  #37  
Old 08-07-2021, 07:31 PM
Bob Y Bob Y is offline
 
Join Date: Jul 2017
Location: Piedmont, SC
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Dick, I wasn’t as successful as Walt with placing the reflective tape on the back of the spinner backplate. The surface was too reflective so the optical sensor couldn’t distinguish the tape from the spinner. I had to move it to the base of the prop. Turns out I needed to place a weigh at the location of where the tape had been located anyway, so it worked out better on the prop for me. Just sharing my experience.
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Last edited by Bob Y : 08-08-2021 at 06:29 AM.
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  #38  
Old 08-08-2021, 01:05 AM
seagull seagull is offline
 
Join Date: Dec 2019
Location: Highland, CA
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I did have that problem in a different way. The spinner backplate is flat grey so it didn’t reflect but when I added the final weight which consisted of a large washer my recheck was crazy. I finally realized the washer was randomly sending a second reflection. A touch of grey paint on the washer brought the readings back to normal.
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  #39  
Old 08-08-2021, 05:40 PM
431HG 431HG is offline
 
Join Date: Aug 2010
Location: Southbury, CT
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Thanks Bob & Walt, I’ll pass information on
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  #40  
Old 09-26-2022, 08:55 PM
np12 np12 is offline
 
Join Date: Dec 2013
Location: colorado springs, co
Posts: 17
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Sent PM regarding balancer
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