Today's Message Index:
----------------------
1. 04:29 AM - Fuel leak .. thanks for the help (james dankovich)
2. 06:43 AM - Re: Washer usage (Klaus Truemper)
3. 06:54 AM - Fw: Washer usage (Jim Belcher)
4. 07:15 AM - Re: Re: Washer usage (Jim Belcher)
5. 12:06 PM - RAC Position Sensor for Flaps (Gig Giacona)
6. 02:02 PM - Re: RAC Position Sensor for Flaps (george may)
7. 02:25 PM - Re: RAC Position Sensor for Flaps (Craig Payne)
8. 08:47 PM - Re: RAC Position Sensor for Flaps (Sabrina)
9. 09:23 PM - Re: Washer usage (Carlos Sa)
Message 1
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| Subject: | Fuel leak .. thanks for the help |
The fuel leak appears to be solved.. the hose was deteriorated.-Drilled i
nspection plates.- Found cracks in the hose.it was -soft and a definite
leakage was present.-
-
Now have had all fuel hose replaced.- Hopefully, life will soon be back t
o great.. once we have started the engine with full tanks we will know if t
he total problem is solved.
-
- Thanks, Ron and all who helped .--
-
-Blue skies !
-
(Oh, how I wish .. here in Michigan today, not so likely....)
Message 2
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| Subject: | Re: Washer usage |
Hi Ken,
The general rule is that a washer must be used on both sides. The reason
is not just to prevent the head or nut from damaging the surface
during the tightening, but also to prevent dangerous corrosion.
The cadmium plating of the washers is
attacked by any corrosion first and thus prevents corrosion at the head
or nut, where corrosion would be dangerous.
Happy flying,
Klaus
Message 3
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There are no enforcable rules as such. As someone pointed out, AC43-13 has the
guidance for washer usage. This advisory circular (technically, not a rule)
applies to type certificated aircraft.
If your aircraft is licensed as an experimental, then the methods described
there are usually wise to use on your aircraft, but not mandatory. They are
simply good practice. For whatever it's worth, I pretty much follow AC43-13
on my experimental.
I have never seen anything in a FAR address washer usage, but that's not to
say it may not exist somewhere.
---------- Forwarded Message ----------
Subject: Zenith-List: Washer usage
From: "Ken" <hror1@pld.com>
What are the rules regarding usage of flat washers on the AN bolts? I assume
you must have one under the nut so you don't scuff the metal it is
tightening against (when you tighten it)? How about the other end, is it
necessary or even required by FARs?
How about on the rudder pedal where you have a bolt going through a clevis
that attaches the cable? Is a washer under the castle nut enough or do you
need one under the head as well?
Thanks in advance.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=265940#265940
-------------------------------------------------------
--
============================================
Do not archive.
============================================
Jim B Belcher
BS, MS Physics, Math, Computer Science
A&P/IA
Retired aerospace technical manager
Mathematics and alcohol do not mix.
Do not drink and derive.
============================================
Message 4
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| Subject: | Re: Washer usage |
On Friday 02 October 2009 08:37, Klaus Truemper wrote:
>
> Hi Ken,
>
> The general rule is that a washer must be used on both sides. The reason
> is not just to prevent the head or nut from damaging the surface
> during the tightening, but also to prevent dangerous corrosion.
> The cadmium plating of the washers is
> attacked by any corrosion first and thus prevents corrosion at the head
> or nut, where corrosion would be dangerous.
>
> Happy flying,
>
> Klaus
A delimma I've found is that Zenith doesn't always supply, or call out, bolts
that allow the use of two washers. I've also found that some of their photos
and drawings do not show the use of washers.
I think this is a mistake, and that Klaus is correct: it is very desirable
that there be a washer under both the head of the bolt, and under the nut.
Another rule of thumb I see ignored in the parts supplied, the drawings, and
the photos is the number of threads showing beyond the end of the nut. I
think I recall AC 43-13 requiring a minimum of one thread showing, and a
maximum of three. Of course, additional washers, up to a maximum of three, or
a maximum 1/8", may be added to achieve this.
I again emphasize that AC43-13 does not apply to experiemental aircraft, but
that's a good guideline. You sure don't want installed bolts that don't have
less than a thread showing beyond the nut.
--
============================================
Do not archive.
============================================
Jim B Belcher
BS, MS Physics, Math, Computer Science
A&P/IA
Retired aerospace technical manager
Mathematics and alcohol do not mix.
Do not drink and derive.
============================================
Message 5
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| Subject: | RAC Position Sensor for Flaps |
I'm using a RAC POS-12 to send flap position to a Dynon 180.
Has anyone else installed one of these? I'm trying to figure out a spot to mount
it?
--------
W.R. "Gig" Giacona
601XL Under Construction
See my progress at www.peoamerica.net/N601WR
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=266104#266104
Message 6
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| Subject: | RAC Position Sensor for Flaps |
Gig--
I mounted mine just behind the control arm of the flaps. I formed a piece
of aluminum that is riveted to the floor and has a slope on it such that t
he control rod with clevises (from Radio Control Model shop) is mounted in
a straight line from the sensor to the upper part of the flap control arm.
You will need to find the sweet spot that will give you the complete range
you are looking for.
good luck
George May
601XL 912s
> Subject: Zenith-List: RAC Position Sensor for Flaps
> From: wrgiacona@gmail.com
> Date: Fri=2C 2 Oct 2009 12:05:39 -0700
> To: zenith-list@matronics.com
>
>
> I'm using a RAC POS-12 to send flap position to a Dynon 180.
>
> Has anyone else installed one of these? I'm trying to figure out a spot t
o mount it?
>
> --------
> W.R. "=3BGig"=3B Giacona
> 601XL Under Construction
> See my progress at www.peoamerica.net/N601WR
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=266104#266104
>
>
>
>
>
>
>
===========
===========
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>
>
>
=0A
_________________________________________________________________=0A
Hotmail: Powerful Free email with security by Microsoft.=0A
Message 7
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| Subject: | RAC Position Sensor for Flaps |
Attached are pictures of Mike Sigman's and Ron Geese's installations.
-- Craig
-----Original Message-----
From: owner-zenith-list-server@matronics.com
[mailto:owner-zenith-list-server@matronics.com] On Behalf Of Gig Giacona
Sent: Friday, October 02, 2009 1:06 PM
Subject: Zenith-List: RAC Position Sensor for Flaps
I'm using a RAC POS-12 to send flap position to a Dynon 180.
Has anyone else installed one of these? I'm trying to figure out a spot to
mount it?
--------
W.R. "Gig" Giacona
601XL Under Construction
See my progress at www.peoamerica.net/N601WR
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=266104#266104
Message 8
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| Subject: | Re: RAC Position Sensor for Flaps |
Gig,
I drilled a 3/16" hole in the flap tube, placed a 'Drilled AN3' bolt along with
three thin AN364 nuts (one to secure the bolt, two to secure a push/pull wire
between the bolt and the RAC POS) and thin washers.
I had to try a couple different length AN bolts to get the correct geometry (Still
looking for a photo for you.)
I mounted the RAC POS on a simple tray that mounts to a simple L angle shown below...
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=266200#266200
Attachments:
http://forums.matronics.com//files/rac_166.jpg
Message 9
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| Subject: | Re: Washer usage |
There is a good summarized Standard document in the ZAC web site.
I don't know if it is still pointed to by any ZAC web page. If it is, I
could not find it. But I do have the direct link to the document:
http://www.zenithair.com/pdf-doc/zenair construction standards draft
1-07.pdf
It does not replace AC43-13, but it is a pretty useful summary.
I believe it is also provided in the CDs that ship with the kit.
Carlos
2009/10/1 Ken <hror1@pld.com>
>
> What are the rules regarding usage of flat washers on the AN bolts? I
> assume you must have one under the nut so you don't scuff the metal it is
> tightening against (when you tighten it)? How about the other end, is it
> necessary or even required by FARs?
>
> How about on the rudder pedal where you have a bolt going through a clevis
> that attaches the cable? Is a washer under the castle nut enough or do you
> need one under the head as well?
>
> Thanks in advance.
>
>
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