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khorton01(at)rogers.com
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 Posted: Tue Dec 19, 2006 3:13 am Post subject: [Bulk] Spar mistake! |
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On 18 Dec 2006, at 22:31, David Karlsberg wrote:
| Quote: | I was back drilling my z brackets on my right wing. Somehow (I
really have
no idea how this happened) I missed the pre-made hole and now have
a new
3/16th inch hole in my spar about a half inch inboard of the second
most
inboard Z bracket. The hole doesnąt interfere with anything and I
have
adequate distance from all of the other holes. I deburred it, but am
concerned it could make the spar weaker... or something. What
should I do?
Leave it? Fill it with something? Patch it? Order a new spar (I hope
not!). I emailed vans too, but wanted to hear what you guys think.
|
The bending loads in the inboard part of the spar are carried by spar
bars. The purpose of the spar web (i.e. the flat sheet metal between
the spar bars) is to keep the spar bars the proper distance apart.
The extra hole you made will have a negligible effect on the ability
of the spar web to perform its job.
Your spar is still OK.
Kevin Horton RV-8 (finishing kit)
Ottawa, Canada
http://www.kilohotel.com/rv8
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phil(at)petrasoft.net
Guest
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| Posted: Tue Dec 19, 2006 6:54 am Post subject: [Bulk] Spar mistake! |
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I agree with Kevin. Keep on building and don't worry about it. A spar
is basically a fancy shaped 'I' Beam and 'I' beams carry the vast
majority of the load in the flanges, not the web.
Godspeed,
Phil Birkelbach - Houston Texas
RV-7 N727WB
http://www.myrv7.com
Kevin Horton wrote:
| Quote: |
On 18 Dec 2006, at 22:31, David Karlsberg wrote:
> I was back drilling my z brackets on my right wing. Somehow (I
> really have
> no idea how this happened) I missed the pre-made hole and now have a new
> 3/16th inch hole in my spar about a half inch inboard of the second most
> inboard Z bracket. The hole doesnąt interfere with anything and I have
> adequate distance from all of the other holes. I deburred it, but am
> concerned it could make the spar weaker... or something. What should
> I do?
> Leave it? Fill it with something? Patch it? Order a new spar (I hope
> not!). I emailed vans too, but wanted to hear what you guys think.
The bending loads in the inboard part of the spar are carried by spar
bars. The purpose of the spar web (i.e. the flat sheet metal between
the spar bars) is to keep the spar bars the proper distance apart.
The extra hole you made will have a negligible effect on the ability
of the spar web to perform its job.
Your spar is still OK.
Kevin Horton RV-8 (finishing kit)
Ottawa, Canada
http://www.kilohotel.com/rv8
|
| | - The Matronics RV-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV-List |
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