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-   -   Safety Wiring Question (https://vansairforce.net/community/showthread.php?t=91662)

cln1owner 10-04-2012 09:49 AM

The Dynon servo mounts look identical to the TTrak. I drilled a small hole in the lower bracket and tied to that.


Hornet2008 10-04-2012 04:18 PM

Is it possible to drill the thread out and put a bolt with nyloc AN 365 and 910 washer right through the servo box? I have the same problem and was looking at that as an easy solution.

bruceh 10-04-2012 07:49 PM

Quote:

Originally Posted by Kahuna (Post 704798)
As mentioned, search safety wire on EAA's website and you will find some neat stuff.

This EAA video has some great advice on safety wiring.

BSwayze 10-06-2012 12:14 AM

Thank you, ALL, for some great input! I can see that there are a number of good options here.

Quote:

Originally Posted by flion (Post 704829)
Dingdingdingding! Kurt has hit the answer according to TruTrak. The instructions for the roll servo specifically call out "Install either internal lock washer or AN960-10 washer with safety wire". <edit>

Patrick, you're quoting from some instructions that I don't seem to have. Where is this set of instructions you're referring to? I bought my brackets from TruTrak and I have printed drawings, but no references are there to any hardware, or the instructions you quote.

Bruce, thanks for the link to the video. Excellent!

flion 10-06-2012 08:05 AM

Quote:

Originally Posted by BSwayze (Post 705381)
Patrick, you're quoting from some instructions that I don't seem to have. Where is this set of instructions you're referring to?

TruTrak has manuals and specific installation instructions online. There's a small link at the bottom of the website that is easy to overlook. It's easy to overlook, so here is the link: http://www.trutrakflightsystems.com/docs.html and you'll find RV installations listed to the right. Not all the installations are as detailed as the RV-10 roll servo (the pitch servo instructions are a picture without measurements even, for example) but you can find threads on here dealing with issues and TruTrak does participate here. I've also found their support to be quite good.

jjconstant 10-06-2012 10:27 AM

I safety wire all three heads together, but I did it with the servo on the bench. I then installed it into the wing. This was a long time ago, before they were even telling you to use drilled bolts. I haven't seen the newer instructions, but they sound better:D Boy, I'm starting to sound like one of the old-timers....Yikes:eek:

JoeBlank 10-06-2012 10:45 AM

Bruce,

It's all right there in AC43-13-1B...
http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgAdvisoryCircular.nsf/list/AC%2043.13-1B/$FILE/Chapter%2007.pdf

Paragraph 7-123

Enjoy!

BillSchlatterer 10-06-2012 08:18 PM

Maybe something different ...
 
I think I remember the hole being threaded all the way through the servo. On my 7, I just got a machine screw(s) (#10 as I remember it) that was fully threaded and ran it all the way through with a lock nut on the back. Maybe I ran a tap through it, that was several years ago but it is bolted and "nutted" on my airplane.

Bill S
7a Ark

BSwayze 10-07-2012 04:35 AM

Quote:

Originally Posted by Hornet2008 (Post 704988)
Is it possible to drill the thread out and put a bolt with nyloc AN 365 and 910 washer right through the servo box? I have the same problem and was looking at that as an easy solution.

Well, after looking at a number of ways to safety this bolt, this is exactly what I ended up doing. Getting into the tight space between the wing ribs, working through this small opening with my big hands proved to be difficult enough. Let alone trying to work with my safety wire pliers, on the back side of this servo. So I took the servo out and ran a #12 reamer all the way through this hole, and simply installed an AN3-12A bolt, 910 washer and locknut. I checked for any clearance issues with the pushrod that will go on here, and there's no problem. Now I'll safety the two bolts on the bottom-front in the regular way to finish this.

Thanks again for all the help. I found those excellent videos on EAA's site, and Joe, thanks for the document! I'm saving it for future reference.


GeneL 10-07-2012 05:34 AM

Loctite
 
BTW, red loctite is very strong, blue is the medium hold. There is also a Stud and Bearing mount that is forever. Gene


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