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Larygagnon(at)aol.com
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 Posted: Tue Aug 22, 2006 5:44 pm Post subject: Alternate cowl fasteners |
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A question for those of you that used an alternate method of securing the upper cowl. I'm planning a strip of . 040 extending an inch forward of the firewall and a three inch spacing for whatever fastener I end up using. Is .040 enough? Three inches to close? I used the hinge method on my first project and found the reduced size pin allows the cowl to lift slightly in flight. Thanks in advance for any input.
Larry Gagnon
RV6 N6LG 0360/Slider
RV6A 0360/Tip-up 80% [quote][b]
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randy(at)romeolima.com
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| Posted: Tue Aug 22, 2006 6:35 pm Post subject: Alternate cowl fasteners |
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Having done two installations now I recommend you use .063" aluminum instead of .040.
Randy Lervold
www.rv-3.com
www.rv-8.com
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kboatright1(at)comcast.ne
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| Posted: Wed Aug 23, 2006 2:42 am Post subject: Alternate cowl fasteners |
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I have 10 #6 screws across the top cowl at the firewall and the installation has held up very well over 5+ years and 400+ hours. I used a 0.063 strip, but that's what I had at the time. 0.040 should be fine.
KB
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shempdowling2(at)earthlin
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| Posted: Wed Aug 23, 2006 6:12 am Post subject: Alternate cowl fasteners |
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I copied the installation method shown in the plans with the camlocs. Great product. I used 063 but trimmed it so it had a saw tooth shape.
Shemp/Jeff Dowling
RV-6A, N915JD
295 hours
Chicago/Louisville
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flyrv6(at)bryantechnology
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| Posted: Wed Aug 23, 2006 7:02 am Post subject: Alternate cowl fasteners |
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>I used 063 but trimmed it so it had a saw tooth shape.<
I second the trimming part. If you don't trim it back between the fasteners, the metal will tend to have an upward curve to it causing the cowl to sit up higher.
Tim, Rv-6
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Rick Galati
Joined: 10 Jan 2006
Posts: 91
Location: Lake St. Louis MO.
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| Posted: Wed Aug 23, 2006 9:34 am Post subject: Re: Alternate cowl fasteners |
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| Larygagnon(at)aol.com wrote: | | A question for those of you that used an alternate method of securing the upper cowl. I'm planning a strip of . 040 extending an inch forward of the firewall and a three inch spacing for whatever fastener I end up using. Is .040 enough? Three inches to close?........... |
Larry,
I sheared a width of aluminum off a 4' piece of .050 stock. To maintain adequate e.d. on the upper cowl screw holes, I believe the width of that strap is going to come in something greater than one inch. It's more like 2 inches or better. My strap nests against the radius of the firewall completely around its overall 4' length and in doing so, the edge of the strap has to be radiused and trimmed here and there to conform to the radius of the firewall. In doing so, that edge of the strap will not end up perfectly straight. I suggest you initially cut your material considerably wider than you anticipate. You can always trim it back later as required. Your planned material thickness and hole spacing seem about right to me.
Rick Galati RV-6A "Darla" 162 Hours
http://img171.imageshack.us/img171/6199/firewall7edited40ki7.jpg
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