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Old Oct 11, 2012, 10:10 AM
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Quote:
Originally Posted by madbomber View Post
Condolences, Alby. Hopefully you can repair it. Were those weights that were being taped in to the top of the wings?
I think it was just masking tape to make sure the wing sections didn't slide apart.
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Old Oct 11, 2012, 11:43 AM
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Quote:
Originally Posted by Sundancer View Post
I think it was just masking tape to make sure the wing sections didn't slide apart.
Yes! is so.
The problem is that the wing works well at the ends.
the extreme wings must bear the full brunt
bayonets must be much more robust. Aluminum are not good

Ciao

Albyone
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Old Oct 11, 2012, 12:57 PM
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Suggest carbon fibre tubes Albyone, either alone if thick enough walls or filled with hardwood dowels if not.
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Old Oct 11, 2012, 02:51 PM
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Albyone, so sorry to see it crash, hope the damage isn't too bad and the repairs are quick!
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Old Oct 11, 2012, 06:06 PM
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Albyone, Sorry to see this beautiful model spiral in because of a wing failure If you have photos of the offending area it would help us understand that went wrong and maybe someone could offer advice.
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Old Oct 12, 2012, 01:36 AM
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I looked at the plans and they call for 1/8" steel pins that slide into brass tubes on the inboard wing. Looking at the picture in post 69, I think he did use the pins but it is hard to tell. I assume they bent and then the balsa spar let go where the pins or tubes were stitched to the spar.
I am only guessing!

Chris
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Old Oct 13, 2012, 01:32 AM
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Quote:
Originally Posted by albyone View Post
Yes! is so.
The problem is that the wing works well at the ends.
the extreme wings must bear the full brunt
bayonets must be much more robust. Aluminum are not good

Ciao

Albyone
Quote:
Originally Posted by Tomahawk View Post
I looked at the plans and they call for 1/8" steel pins that slide into brass tubes on the inboard wing. Looking at the picture in post 69, I think he did use the pins but it is hard to tell. I assume they bent and then the balsa spar let go where the pins or tubes were stitched to the spar.
I am only guessing!

Chris
From the above quote it looks as if Albyone MAY have used aluminium joiners, if so that would certainly account for the problem, no way they would be man enough for the job.
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Old Oct 16, 2012, 04:29 PM
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The repair proceeds.
I put three bayonets to connect the wings.
Two bayonets from 4 mm made ​​from aluminum tube filled with carbon.
The third bayonet is composed of an aluminum rail on both sides and rod of carbon 6mm. Now there is a lot of stiffness in the joint and I think it can not happen again what happened

Ciao

Albyone
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Old Oct 16, 2012, 05:07 PM
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Looking at the end rib it appears to be split along the grain and looks like its balsa only, shouldn't the ribs that have the rods passing though them be ply to help with the load ?
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Old Oct 17, 2012, 05:18 AM
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Quote:
Originally Posted by ColinNZ View Post
Looking at the end rib it appears to be split along the grain and looks like its balsa only, shouldn't the ribs that have the rods passing though them be ply to help with the load ?
I think you are right; as a minimum I would glue plywood rings to the rib, where the rods pass through.
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Old Oct 17, 2012, 10:00 AM
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I really think that would be wise Guizzo, as you have now fitted very stiff joiners there is much more liklihood of a failure occuring elsewhere, like the ribs.
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Old Oct 17, 2012, 02:02 PM
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from the "gull" I put a rib of plywood glued to the balsa. Can I do the same thing on the wings.

Ciao

Albyone
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Old Oct 17, 2012, 02:04 PM
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Sounds like a good idea Albyone.
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Old Oct 17, 2012, 03:51 PM
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Quote:
Originally Posted by albyone View Post
from the "gull" I put a rib of plywood glued to the balsa. Can I do the same thing on the wings.

Ciao

Albyone

Yes thats how I do mine. I use 1/32 ply
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Old Oct 18, 2012, 04:01 PM
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New progress.
The front is almost ready
I can begin to cover the wings
Ciao

Albyone
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