Today's Message Index:
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1. 08:43 AM - elevator assembly bolt (rosane)
2. 09:01 AM - Re: elevator assembly bolt (steve eccles)
3. 03:26 PM - Re: elevator assembly bolt (Tom Jones)
4. 04:54 PM - Re: Re: elevator assembly bolt (Dave)
Message 1
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| Subject: | elevator assembly bolt |
I read many messages about the elevator assembly bol at the end of the
elevator rod. I was going to change for an hex bolt to make it easier to
remove and install at annual inspection
An aviation mechanic told me that the clevis slotted bolt is meant to work
in a shear situation, like the assembly we got on our Kitfox, while the hex
bolt is for tension load.
So, I understand there is a difference between those bolts ane should keep
using the recommended clevis shear bolt for that application.
Am I wrong with this?
Jack
Model 4- 912 UL
Message 2
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| Subject: | elevator assembly bolt |
I would advise using the correct bolt but as it is an experimental you have
the option of experimenting with this bolt..at your own peril
Steve
From: owner-kitfox-list-server@matronics.com
[mailto:owner-kitfox-list-server@matronics.com] On Behalf Of rosane
Sent: Sunday, October 16, 2011 10:41 AM
Subject: Kitfox-List: elevator assembly bolt
I read many messages about the elevator assembly bol at the end of the
elevator rod. I was going to change for an hex bolt to make it easier to
remove and install at annual inspection
An aviation mechanic told me that the clevis slotted bolt is meant to work
in a shear situation, like the assembly we got on our Kitfox, while the hex
bolt is for tension load.
So, I understand there is a difference between those bolts ane should keep
using the recommended clevis shear bolt for that application.
Am I wrong with this?
Jack
Model 4- 912 UL
_____
No virus found in this message.
Checked by AVG - www.avg.com
Message 3
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| Subject: | Re: elevator assembly bolt |
Here's the AC43.13-1B description of the bolts.
http://www.google.com/url?sa=t&source=web&cd=1&ved=0CCMQFjAA&url=http%3A%2F%2Frgl.faa.gov%2FRegulatory_and_Guidance_Library%2FrgAdvisoryCircular.nsf%2F0%2F99c827db9baac81b86256b4500596c4e%2F%24FILE%2FChapter%252007.pdf&rct=j&q=ac%2043.13-1b%20chapter%207&ei=P1WbToJ95piJAovWwKoN&usg=AFQjCNHY0R3h15PB4iLsDuKUnWf-YEtkKg&sig2=n9-WnC4eJEtyZu9Wcbpiiw&cad=rja
> 7-41. STANDARD AIRCRAFT HEX
> HEAD BOLTS (AN3 THROUGH AN20).
> These are all-purpose structural bolts used for
> general applications that require tension or
> shear loads. Steel bolts smaller than
> No. 10-32, and aluminum alloy bolts smaller
> than 1/4 inch diameter, should not be used in
> primary structures. Do not use aluminum bolts
> or nuts in applications requiring frequent removal
> for inspection or maintenance.
>
> 7-50. CLEVIS BOLTS (AN21
> THROUGH AN36). These bolts are only
> used in applications subject to shear stress, and
> are often used as mechanical pins in control
> systems.
I'm not an A&P but my understanding is hex bolts are used in both shear and tension
loads. Clevis bolts are only used in applications subject to shear stress.
Clevis bolts have the flat slotted head and short threads for a thin AN364 shear
nut. This is needed for the clearance from the fabric at the rear of the tube.
You will note in your kitfox manual that the foreword end of the elevator control
tube uses hex bolts through the rod ends.[/b]
--------
Tom Jones
Classic IV
503 Rotax, 72 inch Two blade Warp
Ellensburg, WA
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=355231#355231
Message 4
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| Subject: | Re: elevator assembly bolt |
Perhaps I am missing something. I never experienced a bit of angst about
this bolt. I noticed a lack of room and quickly burned a hole in the fabric
so I could hit it with a straight screwdriver. Then I used the hole to pass
the wires for the trim servo out of the fuselage. To reverse the procedure,
unplug the wires, pass 'em back inside and raise the elevator to line the
bolt up with the hole.
Do not archive
Dave G. KF IV 582 Warp
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