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tonyrenshaw268(at)gmail.c
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 Posted: Sat Oct 05, 2013 9:09 pm Post subject: Fuselage weakness, or intentional ?? |
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Gidday,
Whilst working around in the lower fuse it has concerned me that my fuselage has what appears to be an intentional absence of core material such that an obvious weakness exists in the fuselage directly above the penetrations for the flap drive cross tube. Has anyone externally reinforced this area, by adding core material and strapping it in place, encapsulating it, and resulting in a conventional sandwich construction concept?
Regards
Tony Renshaw
Using Skitch on Mac for photo work.
| | - The Matronics Europa-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:
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christoph.both(at)acadiau
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| Posted: Sun Oct 06, 2013 4:34 am Post subject: Fuselage weakness, or intentional ?? |
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I assume this is an important security feature isolating the cockpit cell from the remainder of the back fuselage in case of a hard crash. Perhaps Ivan or Nev or those involved on the first hours have an answer. I would be cautious to make changes, especially reinforcements as in composite construction these changes allow forces to migrate to other areas they might not be intended for, with possibly undesirable consequences. The mandatory root layup Mod of the glider wing speaks of this very clearly where such migratory consequences of material stresses under high G were initially not taken into consideration.
Christoph
223 Europa classic
Wolfville Nova Scotia
Sent from my iPhone
On 2013-10-06, at 1:10, "Tony Renshaw" <tonyrenshaw268(at)gmail.com> wrote:
| Quote: | Gidday,
Whilst working around in the lower fuse it has concerned me that my fuselage has what appears to be an intentional absence of core material such that an obvious weakness exists in the fuselage directly above the penetrations for the flap drive cross tube. Has anyone externally reinforced this area, by adding core material and strapping it in place, encapsulating it, and resulting in a conventional sandwich construction concept?
Regards
Tony Renshaw
Using Skitch on Mac for photo work.
<Attachment-1.jpeg>
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| | - The Matronics Europa-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:
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nigel henry
Joined: 24 Feb 2011
Posts: 16
Location: oxford uk
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| Posted: Sun Oct 06, 2013 9:44 am Post subject: Fuselage weakness, or intentional ?? |
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| Quote: | Subject: Europa-List: Fuselage weakness, or intentional ??
From: tonyrenshaw268(at)gmail.com
Date: Sun, 6 Oct 2013 16:07:17 +1100
To: europa-list(at)matronics.com
Gidday,
Whilst working around in the lower fuse it has concerned me that my fuselage has what appears to be an intentional absence of core material such that an obvious weakness exists in the fuselage directly above the penetrations for the flap drive cross tube. Has anyone externally reinforced this area, by adding core material and strapping it in place, encapsulating it, and resulting in a conventional sandwich construction concept?
Regards
Tony Renshaw
Using Skitch on Mac for photo work.
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[quote][b]
| | - The Matronics Europa-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?Europa-List |
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nigel_graham(at)m-tecque.
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| Posted: Sun Oct 06, 2013 10:41 pm Post subject: Fuselage weakness, or intentional ?? |
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Tony,
I suspect that this an obsolete design feature from the old "classic"
Europa, that had the bagage bay bulkhead at that position. When bonding
component together, you don't want a foam core at the bond-site - hence
the triangle (compare the angle of the foam with the angle of the
bulkhead). When the classic was developed into the XS and the bulkhead
moved back, this was never changed.
It does not constitute a weak point and I would not worry about it.
Adding more material will only add more weight.
Nigel
On 06/10/2013 06:07, Tony Renshaw wrote:
| Quote: | Gidday,
Whilst working around in the lower fuse it has concerned me that my fuselage has what appears to be an intentional absence of core material such that an obvious weakness exists in the fuselage directly above the penetrations for the flap drive cross tube. Has anyone externally reinforced this area, by adding core material and strapping it in place, encapsulating it, and resulting in a conventional sandwich construction concept?
Regards
Tony Renshaw
Using Skitch on Mac for photo work.
|
| | - The Matronics Europa-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?Europa-List |
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jan_de_jong(at)casema.nl
Guest
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| Posted: Wed Oct 09, 2013 1:20 pm Post subject: Fuselage weakness, or intentional ?? |
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I ran out to the garage to check and "never changed" was not true
anymore when kit #461 (about 2000) was produced.
I do not say that the absence of foam core constitutes a weak point - I
wouldn't know.
Jan de Jong
On 10/7/2013 8:40 AM, Nigel Graham wrote:
| Quote: |
<nigel_graham(at)m-tecque.co.uk>
Tony,
I suspect that this an obsolete design feature from the old "classic"
Europa, that had the bagage bay bulkhead at that position. When
bonding component together, you don't want a foam core at the
bond-site - hence the triangle (compare the angle of the foam with the
angle of the bulkhead). When the classic was developed into the XS and
the bulkhead moved back, this was never changed.
It does not constitute a weak point and I would not worry about it.
Adding more material will only add more weight.
Nigel
On 06/10/2013 06:07, Tony Renshaw wrote:
> Gidday,
> Whilst working around in the lower fuse it has concerned me that my
> fuselage has what appears to be an intentional absence of core
> material such that an obvious weakness exists in the fuselage
> directly above the penetrations for the flap drive cross tube. Has
> anyone externally reinforced this area, by adding core material and
> strapping it in place, encapsulating it, and resulting in a
> conventional sandwich construction concept?
> Regards
> Tony Renshaw
>
> Using Skitch on Mac for photo work.
>
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