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  #1  
Old 04-13-2016, 06:11 PM
N743RV N743RV is offline
 
Join Date: May 2009
Location: Livermore, CA
Posts: 57
Unhappy Loose RV-7A Elevator Counterweight

I recently noticed that both of my elevator counter weights are slightly loose. I hopefully have embedded a photo showing their arrangement below. It was built and installed according the plans. I was an early 7a builder and the design change soon after I started. The bolt you see in the photo has a locknut on the the other side that can't be reached without removing the elevator tip fairing, so there is no way to tighten the assembly with a fairing removal...which I really don't want to do.

[IMG][/IMG]

Has anyone addressed this issue? Any ideas on how I can bond the periphery of the lead weight to the aluminum with the limited access you see. I want something that will bond well and add little weight.

Bob Cowan
N743RV
RV7a, 300+ hours
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  #2  
Old 04-13-2016, 06:17 PM
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Veetail88 Veetail88 is offline
 
Join Date: Oct 2008
Location: Hales Corners, WI
Posts: 988
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Wow! While I don't have a fix for you, I certainly wouldn't fly it until that's addressed! If that weight came out a bit further I think it would ruin your day.
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N229Z - RV-8 - Flying - Livin' the dream!
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  #3  
Old 04-13-2016, 06:33 PM
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blueflyer blueflyer is offline
 
Join Date: Nov 2008
Location: Shreveport, LA
Posts: 1,044
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spouting off here just what comes to mind.........can you drill a hole in the fairing just large enough to get a long socket extension in there to capture the nut? You would have to feel around, and you would have a hole in your fairing, but you wouldn't have to remove the fairing.
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  #4  
Old 04-13-2016, 06:34 PM
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Bob Kuykendall Bob Kuykendall is offline
 
Join Date: Sep 2006
Location: Douglas Flat, CA
Posts: 589
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Can you just drill two holes in the fairing large enough to get a socket onto the nuts? Of course, you'd have to patch the fairing afterwards, but it only has to be a cosmetic patch.
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  #5  
Old 04-13-2016, 06:44 PM
Michael Henning Michael Henning is offline
 
Join Date: Jun 2011
Location: Nashua, NH
Posts: 537
Default 2nd

I too would drill a hole large enough for a socket to get in there, then it's an easy patch. The pain would be the paint.
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  #6  
Old 04-13-2016, 06:49 PM
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blueflyer blueflyer is offline
 
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Location: Shreveport, LA
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if you're not too OCD, you could buy speed tape to cover the holes while you fly and think about how you want to patch/cover the holes in case you need to get back in there again.
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  #7  
Old 04-13-2016, 06:58 PM
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Larco Larco is offline
 
Join Date: Mar 2005
Location: DVT Phoenix
Posts: 1,223
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Maybe make a hole in the bottom of the fairing right below the nuts and use an offset wrench? Less noticeable when touched up. :-)
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  #8  
Old 04-13-2016, 07:43 PM
flyinmonque flyinmonque is offline
 
Join Date: Mar 2006
Posts: 206
Default Had same problem on my 9A after a few years.

Drilled a small hole maybe 1/2" in the bottom of the fairing for a box ended wrench. One hole between the two bolts. Had to take the nut off and add washers then retighten. Duct tape holds nut in wrench wasn't that hard to do. Still have not repainted fairing but it doesn't show. Close to 1000 hrs later no problem.

Last edited by flyinmonque : 04-13-2016 at 07:48 PM. Reason: add text
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  #9  
Old 04-13-2016, 07:43 PM
Beancounter Beancounter is offline
 
Join Date: Oct 2007
Location: Canada
Posts: 100
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A bent wrench could reach the nut from a hole in the rib just aft of the counterweight.
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  #10  
Old 04-13-2016, 08:09 PM
TomSpencer46 TomSpencer46 is offline
 
Join Date: Jan 2014
Location: ferrisburgh Vt
Posts: 65
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I would try to use a battery drill with a socket on the bolt end. The friction on the nut on the back side may be enough to tighten it. Turn the torque adjustment on the drill way down to prevent snapping the bolt if this works to well. Worth a try before you start to cut into the fairing.

RV-10 started 11/2015 going great.
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