---------------------------------------------------------- Kitfox-List Digest Archive --- Total Messages Posted Sun 10/16/11: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 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 _____________________________________ Time: 08:43:45 AM PST US From: "rosane" 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 ________________________________ Message 2 _____________________________________ Time: 09:01:35 AM PST US From: "steve eccles" Subject: RE: Kitfox-List: 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 _____________________________________ Time: 03:26:17 PM PST US Subject: Kitfox-List: Re: elevator assembly bolt From: "Tom Jones" 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 _____________________________________ Time: 04:54:51 PM PST US From: "Dave " Subject: RE: Kitfox-List: 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. 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