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Carbon Mast Insert repair?

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DAnderson
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Carbon Mast Insert repair?

Postby DAnderson » Fri Nov 02, 2018 4:33 pm

A local here has managed to pull one of the fuselage inserts out 1-2 mm. Its a Moses. Any repair suggestions?
Whacking it back would just be a temporary fix. Shimming the other side helps the fuselage angle temporarily.

Foil
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Re: Carbon Mast Insert repair?

Postby Foil » Fri Nov 02, 2018 6:39 pm

Is this on the curved mast from 2016??

plummet
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Re: Carbon Mast Insert repair?

Postby plummet » Fri Nov 02, 2018 7:01 pm

Photo's please.

cwood
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Re: Carbon Mast Insert repair?

Postby cwood » Sun Nov 04, 2018 2:15 pm

DAnderson wrote:
Fri Nov 02, 2018 4:33 pm
A local here has managed to pull one of the fuselage inserts out 1-2 mm. Its a Moses. Any repair suggestions?
Whacking it back would just be a temporary fix. Shimming the other side helps the fuselage angle temporarily.
Hard to say but a pic would help. Depends how those inserts are retained in the mast foot...I would imagine they have some sort of textured exterior for the resin to bite into....which might mean removing it, drilling the hole a bit bigger and then re-setting with epoxy.

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Re: Carbon Mast Insert repair?

Postby BWD » Sun Nov 04, 2018 2:42 pm

Agree specifics would depend on how it’s put together.
If it ends up needing to be drilled out, use lots of water or oil to keep it cool.
Resin is usually only good to 50f degrees or so above it’s cure temp, so probably 170-250 F.

Foil
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Style: improving foiler.
Gear: Moses T38 full carbon Ltd edition. number 3 and number 56.
101cmMoses Carbon mast
Moses- 633 wave wing and stab
Moses 2018 637 race wing and stab,
Moses wings 590 and 548
Ozone Reo 6/8/9/10/12/
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Re: Carbon Mast Insert repair?

Postby Foil » Sun Nov 04, 2018 5:37 pm

cwood wrote:
Sun Nov 04, 2018 2:15 pm
DAnderson wrote:
Fri Nov 02, 2018 4:33 pm
A local here has managed to pull one of the fuselage inserts out 1-2 mm. Its a Moses. Any repair suggestions?
Whacking it back would just be a temporary fix. Shimming the other side helps the fuselage angle temporarily.
Hard to say but a pic would help. Depends how those inserts are retained in the mast foot...I would imagine they have some sort of textured exterior for the resin to bite into....which might mean removing it, drilling the hole a bit bigger and then re-setting with epoxy.
My sailing buddy had the same happen to his mast, it was the earlier curved 93 cm mast,
He sent it to a guy who was very handy with carbon epoxy repairs but he sent it back saying that it was unclear how the inserts were fixed in and did not want to possibly wreck the mast by investigating too deeply.
So my buddy knocked it back flush again and continued to use it, after months of regular use it never moved again, strange that it never moved again, I still can't understand why it stayed flush after it raised out of its seating by 1or2 mm,
It would be good to know if it's fixed into the much wider part of the mast maybe 3 or more cm up from the thiner connecting spigot part.
After seeing this, I now don't leaver my fixing nuts as tight as I normally did, :nono:

cwood
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Re: Carbon Mast Insert repair?

Postby cwood » Sun Nov 04, 2018 11:00 pm

Foil wrote:
Sun Nov 04, 2018 5:37 pm
cwood wrote:
Sun Nov 04, 2018 2:15 pm
DAnderson wrote:
Fri Nov 02, 2018 4:33 pm
A local here has managed to pull one of the fuselage inserts out 1-2 mm. Its a Moses. Any repair suggestions?
Whacking it back would just be a temporary fix. Shimming the other side helps the fuselage angle temporarily.
Hard to say but a pic would help. Depends how those inserts are retained in the mast foot...I would imagine they have some sort of textured exterior for the resin to bite into....which might mean removing it, drilling the hole a bit bigger and then re-setting with epoxy.
My sailing buddy had the same happen to his mast, it was the earlier curved 93 cm mast,
He sent it to a guy who was very handy with carbon epoxy repairs but he sent it back saying that it was unclear how the inserts were fixed in and did not want to possibly wreck the mast by investigating too deeply.
So my buddy knocked it back flush again and continued to use it, after months of regular use it never moved again, strange that it never moved again, I still can't understand why it stayed flush after it raised out of its seating by 1or2 mm,
It would be good to know if it's fixed into the much wider part of the mast maybe 3 or more cm up from the thiner connecting spigot part.
After seeing this, I now don't leaver my fixing nuts as tight as I normally did, :nono:
Tightening firmly shouldn't be a problem if the fuselage is firm and correctly mated to the mast because the mast bottoms out against the fuse and therefor the insert would as well be hard against the fuselage aluminum. I suspect he had debris in the way and that left a gap and nothing opposing the insert as he cranked it tight.
Last edited by cwood on Mon Nov 05, 2018 11:27 am, edited 1 time in total.

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Peter_Frank
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Re: Carbon Mast Insert repair?

Postby Peter_Frank » Mon Nov 05, 2018 10:43 am

Could someone post a picture of what we are talking about?

Might be relevant for others :roll:

8) PF

cwood
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Re: Carbon Mast Insert repair?

Postby cwood » Mon Nov 05, 2018 3:50 pm

Peter_Frank wrote:
Mon Nov 05, 2018 10:43 am
Could someone post a picture of what we are talking about?

Might be relevant for others :roll:

8) PF
Here you go. These threaded inserts sit flush with mast bottom.

Image

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Peter_Frank
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Re: Carbon Mast Insert repair?

Postby Peter_Frank » Mon Nov 05, 2018 4:03 pm

Thanks cwood, that explains....

I thought it was brass barrel nuts like this:

Image


Anybody who knows how the threaded inserts on the Moses are fixed, what do they look like before mounted into the mast?

Would clear up how to fix and how risky (or not) it will be :thumb:

8) Peter


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