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HB-YNK
Joined: 30 Sep 2016
Posts: 6
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 Posted: Mon Apr 01, 2024 5:20 am Post subject: Glass fiber deformation at fuselage |
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Hello to everybody
Would be great if someone could help me with my issue:
I’ve got some deforming on my Europa XS Monowheel of the glass fiber at 4 positions on my fuselage, due to an inappropriate cover which got to hot from the sunshine. I guess it tempered the glass fiber. The positions are on both sides directly behind the doors and on top between the doors next to the fixations of the doors. Attached are two pictures of the biggest deformation.
So my question is, whether this is an structural damage which I should repair or its still good to fly?
In case it’s a damage, how should I repair this?
With which temperature was the glass fiber pre-tempered?
Does someone has a datasheet of this glass fiber?
Many thanks for your help
Best regards,
Marcel
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Marcel Bodmer
Europa XS Monowheel
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DuaneFamly
Joined: 16 Jan 2022
Posts: 18
Location: Chandler, AZ
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| Posted: Mon Apr 01, 2024 9:13 am Post subject: Glass fiber deformation at fuselage |
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This appears to be related to an expansion issue between the outer fuselage and the interior cobra used for fueling. I would look at the bonding on the inside between the cobra and the fuselage to see if there might have been a difference in the expansion rate or amount that could have caused this buckling.
If there is a blob of adhesive or other bonding material directly behind the buckling, you might think about removing this material, slowly rewarming the fuselage from the inside, and having a smooth contouring backing against the outside at the buckling point to see if you could press the warmed fiberglass back into it's original shape.
I do not believe it's a structural issue that would cease any flying.
But that is MY 2 cents and it's only worth the paper it's written on.
Mike Duane N377EA
Europa XS Conventional Gear
Chandler, AZ (it's gets really hot here)
On Monday, April 1, 2024 at 06:22:45 AM MST, HB-YNK <marcel.bo(at)hotmail.com> wrote:
--> Europa-List message posted by: "HB-YNK" <marcel.bo(at)hotmail.com (marcel.bo(at)hotmail.com)>
Hello to everybody
Would be great if someone could help me with my issue:
I’ve got some deforming on my Europa XS Monowheel of the glass fiber at 4 positions on my fuselage, due to an inappropriate cover which got to hot from the sunshine. I guess it tempered the glass fiber. The positions are on both sides directly behind the doors and on top between the doors next to the fixations of the doors. Attached are two pictures of the biggest deformation.
So my question is, whether this is an structural damage which I should repair or its still good to fly?
In case it’s a damage, how should I repair this?
With which temperature was the glass fiber pre-tempered?
Does someone has a datasheet of this glass fiber?
Many thanks for your help
Best regards,
Marcel
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_____________________________________
Marcel Bodmer
Europa XS Monowheel
HB-YNK
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=513437#513437
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http://forums.matronics.com//files/img_6646_128.jpg
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JonathanMilbank
Joined: 14 Apr 2012
Posts: 384
Location: Aberdeen area
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| Posted: Mon Apr 01, 2024 9:34 am Post subject: Re: Glass fiber deformation at fuselage |
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As far as I know, the fuselage shell consists of an outer and an inner fiberglass skin, with a layer of foam about 3mm thick between the two skins. I recall when fitting the door shoot bolt stops modification, that it was necessary to drill right through both skins for the bolt holes and then to pick out the foam surrounding the holes from between the skins.
So unless the inner fuselage skin is also affected by excess heat, my guess is that any repair would only be needed to the outer skin. The repair would need to be done by somebody with suitable expertise.
If I lived "in the middle of nowhere" without anyone to ask, but having the necessary materials and tools to hand, I might be tempted to consider this as not significantly weakening the aircraft structure. In which case I'd make a repair with light weight filler into the hollows, a thin layer of fiberglass over the top, then apply smoothing materials followed by paint. Of course the filler and fiberglass would need to be a little below the surrounding fuselage surface, before adding smoothing stuff and paint.
Just saying..........
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ward.t(at)xtra.co.nz
Guest
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| Posted: Mon Apr 01, 2024 12:39 pm Post subject: Glass fiber deformation at fuselage |
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Hi Marcel,I had the same problem many years ago, but only to the fuel intake side below the fuel cap. This was due to the fuel inside ‘Cobra’ being attached to the inner skin of the fuselage and contracting and expanding at a different rate with heat (hot day) where the attachments were placed. I removed the cobra and laid up the inside with a number of BID fibreglass layers over a large area around the cobra path, to strengthen it. Also made sure there was a gap between the Cobra and inner wall to allow for the contracting and expanding, then reattached the Cobra.
I did not bother to fill the outside deformation and repaint as it was hardly noticeable and a repaint would be more noticeable, and another job.
With regard to your other areas, there maybe a similar attachment installed for items which has caused the two fuselage thin sandwich walls to deform?
Cheers, Tim
Sent from my iPadTim Ward
12 Waiwetu Street,
Fendalton,
Christchurch, 8052
New Zealand.
ward.t(at)xtra.co.nz
021 0640221
| Quote: | On 2/04/2024, at 2:29 AM, HB-YNK <marcel.bo(at)hotmail.com> wrote:
--> Europa-List message posted by: "HB-YNK" <marcel.bo(at)hotmail.com>
Hello to everybody
Would be great if someone could help me with my issue:
I’ve got some deforming on my Europa XS Monowheel of the glass fiber at 4 positions on my fuselage, due to an inappropriate cover which got to hot from the sunshine. I guess it tempered the glass fiber. The positions are on both sides directly behind the doors and on top between the doors next to the fixations of the doors. Attached are two pictures of the biggest deformation.
So my question is, whether this is an structural damage which I should repair or its still good to fly?
In case it’s a damage, how should I repair this?
With which temperature was the glass fiber pre-tempered?
Does someone has a datasheet of this glass fiber?
Many thanks for your help
Best regards,
Marcel
--------
_____________________________________
Marcel Bodmer
Europa XS Monowheel
HB-YNK
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=513437#513437
Attachments:
http://forums.matronics.com//files/img_6646_128.jpg
|
| | - 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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Kelvin Weston
Joined: 14 Apr 2010
Posts: 90
Location: Hampshire, UK
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| Posted: Fri Apr 05, 2024 9:11 am Post subject: Re: Glass fiber deformation at fuselage |
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Hi Marcel
I believe this is a fairly common problem if the fuselage has been parked in strong sunlight and got hot.
If you are a Europa Club member, there is an article in the Europa Flyer No 68 that describes the problem and the fix.
The skin can be restored by warming and re-shaping and reinforcement can be added on the inside.
| | - 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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Regards
Kelv Weston
Kit 497
kelv@kdweston.co.uk |
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