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bob88
Joined: 24 Feb 2013
Posts: 99
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 Posted: Sat Jan 24, 2015 10:02 am Post subject: Lower cowl attach problem |
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I'm at the point of attaching the lower cowl aft edge hinge to the cowl and need to drill holes for the rivets. I have the upper cowl secured in place and the lower cowl is clecoed to the upper at the forward end and secured at the bottom. Thus, no inside access. Is there a trick to sticking the cowl part of the hinge to the inside and then drilling from the outside...or a better plan? Suggestions appreciated.
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kdb.rv10(at)gmail.com
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| Posted: Sat Jan 24, 2015 11:40 am Post subject: Lower cowl attach problem |
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Don't use the hinge on the lower rear of the cowl; it will break. I put a plate on each side attached to the firewall where the hinge would go and then put 3 screws on each side through the bottom cowl. Also, make them countersunk with washers. That works well. You could also use skybolt's fasteners.
Kevin Belue
Sent from my iPhone
On Jan 24, 2015, at 12:02 PM, "bob88" <marty.crooks(at)comcast.net> wrote:
| Quote: |
I'm at the point of attaching the lower cowl aft edge hinge to the cowl and need to drill holes for the rivets. I have the upper cowl secured in place and the lower cowl is clecoed to the upper at the forward end and secured at the bottom. Thus, no inside access. Is there a trick to sticking the cowl part of the hinge to the inside and then drilling from the outside...or a better plan? Suggestions appreciated.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=437564#437564
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jesse(at)saintaviation.co
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| Posted: Sat Jan 24, 2015 12:00 pm Post subject: Lower cowl attach problem |
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Well, they might break. On all the -10's I've messed with, some break and some don't. It's hard to tell what causes them to break. The best option, as mentioned, is a plate with screws or 2 skybolts on each side. The hinge pin is a royal pain to mess with anyway.
Jesse Saint
Saint Aviation, Inc.
352-427-0285
jesse(at)saintaviation.com
Sent from my iPad
| Quote: | On Jan 24, 2015, at 2:37 PM, Kevin Belue <kdb.rv10(at)gmail.com> wrote:
Don't use the hinge on the lower rear of the cowl; it will break. I put a plate on each side attached to the firewall where the hinge would go and then put 3 screws on each side through the bottom cowl. Also, make them countersunk with washers. That works well. You could also use skybolt's fasteners.
Kevin Belue
Sent from my iPhone
> On Jan 24, 2015, at 12:02 PM, "bob88" <marty.crooks(at)comcast.net> wrote:
>
>
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> I'm at the point of attaching the lower cowl aft edge hinge to the cowl and need to drill holes for the rivets. I have the upper cowl secured in place and the lower cowl is clecoed to the upper at the forward end and secured at the bottom. Thus, no inside access. Is there a trick to sticking the cowl part of the hinge to the inside and then drilling from the outside...or a better plan? Suggestions appreciated.
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=437564#437564
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Lew Gallagher
Joined: 04 Jan 2008
Posts: 402
Location: Greenville , SC
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| Posted: Sat Jan 24, 2015 12:48 pm Post subject: Lower cowl attach problem |
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Hey Bob,
If the other's response to attaching the cowl to the bottom of the firewall
apply, then never mind.
Are you talking about attaching the horizontal hinge (which fastens the
upper and lower cowls) to the bottom half of the cowl at the aft end?
Later, - Lew
--
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bob88
Joined: 24 Feb 2013
Posts: 99
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| Posted: Sat Jan 24, 2015 1:18 pm Post subject: Re: Lower cowl attach problem |
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Actually, I did the plate with screws/nutplates on the bottom. My issue is with the hinge attachment to the sides of the lower cowl along the firewall; not the upper to lower attachment. Trying to figure out how to drill the rivet holes with the cowl in position.
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Bob Turner
Joined: 03 Jan 2009
Posts: 885
Location: Castro Valley, CA
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| Posted: Sat Jan 24, 2015 2:21 pm Post subject: Re: Lower cowl attach problem |
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By careful measuring and/or shining a bright light inside, you should be able to draw an outline of the hinge on the outside of the cowl. Then mark a centerline, and mark where you want the rivets to go. Start at bottom, this is the hard part. As the drill comes thru the fiberglass, either have a long arm inside (thru the bottom opening) to hold the hinge flat against the cowl; OR, bend the hinge out of the way, drill thru the cowl, rotate the hinge back into position, mark with a sharpie, remove the cowl, drill the hinge. #1 is more accurate and quicker if you have the long arm of yourself or a helper. I think I did it by myself using a scrap of wood to hold the hinge. Once the first hole is drilled, use a cleco to hold the hinge against the cowl. Drill with light pressure so you don't push the hinge away. Cleco as you go. As per the instructions, if too many shavings build up between the hinge and cowl, stop and blow them out so they don't keep the hinge from laying flat.
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Dave Saylor
Joined: 11 Jan 2015
Posts: 209
Location: GILROY, CA
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| Posted: Sat Jan 24, 2015 4:58 pm Post subject: Lower cowl attach problem |
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One way is to attach the aft section to the side of the fuse.
Then join the hinge halves with the pin so the fwd half is hanging in space.
Now put the lower cowl in place so you're happy with the fit.
Drill two or three no. 40 holes in the cowl to catch the fwd hinge half. Cleco the cowl to the hinge and finish the rivet pattern. The original holes can be filled later if they don't end up as part of the desired layout.
You might consider moving the aft hinge halfs about 1/8" forward relative to the fuse so the knuckles don't line up exactly with the split line. But that may require a wider hinge flange than Vans supplies-- I don't recall. Otherwise you end up with the knuckles visible in the gap.
--Dave
On Saturday, January 24, 2015, bob88 <marty.crooks(at)comcast.net (marty.crooks(at)comcast.net)> wrote:
[quote]--> RV10-List message posted by: "bob88" <[url=javascript:;]marty.crooks(at)comcast.net[/url]>
Actually, I did the plate with screws/nutplates on the bottom. My issue is with the hinge attachment to the sides of the lower cowl along the firewall; not the upper to lower attachment. Trying to figure out how to drill the rivet holes with the cowl in position.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=437575#437575
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