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Old 29 May 2010, 19:25   #11
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Country: Ireland
Town: Loch Lurgain
Boat name: an t-easnach
Make: Gemini
Length: 5m +
Engine: Honda 50
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if you search the archive you might come across something written by a scottish lad on here about 7 years ago
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Old 29 May 2010, 22:13   #12
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Country: UK - Wales
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Boat name: DynaMoHumm/ SRV/deja
Make: Avon8.4, 5.4 & 4.777
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Engine: Cat3126 Yam 90 &70
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make a former by cutting ou two circles from 3/4 inch MDF the same diameter as the inside of the toob. stick them together and cut an inside circle an inch smaller than the outer circle. Cover the 1 and a half inch former with hypalon glue up half the former and the inside of the existing tube. this presents you with a solid unglued hypalon former protuding 3/4 of and inch from the rear of the toobs which your tube nose fits on.

Glue the nose and the remaining half of the former and stick together
reinforce the joint with exterior band of hypalon
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Old 30 May 2010, 06:33   #13
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Boat name: DynaMoHumm/ SRV/deja
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Engine: Cat3126 Yam 90 &70
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I should have made it clear that this is to support the join not replace it so the new nose cone should be stuck to the old toob in the same place as it was prior to deconstruction. You might also need to shape the former a bit to take account of the toob taper
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Old 08 June 2010, 02:31   #14
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Posts: 6,556
http://www.tidel.biz/ribrepair.php
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Old 06 July 2010, 13:13   #15
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Country: USA
Town: Santa Barbara, CA
Boat name: Searider 4m + 5.4m
Make: Avon
Length: 5m +
Engine: Outboard
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I have successfully done the repair this weekend, and thought I would share some of my experience:
First, I pulled apart the seam between the cone halves and the tube which was badly damaged. Then, I pulled apart the cone halves and removed them from the rubber end cone bit. This was a little tricky but not too bad with a heat gun.
Next, I started to clean the joint on the tube-side and realized the damage was bad enough to also remove a bit of the cone. I cut off about two inches off the end of the cone which gave me good material to bond to. I ordered some Hypalon from Clavey which didn;'t quite match the Avon color, but seemed to be ok. The cone parts as well as the bit I removed from the tube were traced onto the hypalon with 1" bond-overlaps added to the strip cut from the tubes. I matched the weave and weft direction on the cone bits, and cheated a little on the long strips to reduce off-cut.
Re-assembly proved to be extremely tricky, and I would not try this without having at least two helpers. I also put an inflatable beach-ball into the tube to hold it open which helped a lot, and which I could remove before the final bond.

Re-Installation:
1. Bond the two cone triangles to each other and onto the rubber end bit.
2. Bond the tube strip to the tube.
3. Roll up the bottom half of the cone and tape it so its out of the way.
4. Bond the upper cone half to the tube.
5. Use a marker to index the corner of the bottom tube (the final circumferential bit) so that the cone-tube joint, and the joint between the cone halves will fit.
6. Bond the lower cone halve to the tube, accessing the inside of the tube though the open joint between the cone halves.
7. Remove beach ball, deflate and bond cone halves together.
8. Lightly inflate and let cure.
9. Measure, cut and glue the overlap bits.

Cheers,


Ole
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Old 06 July 2010, 13:34   #16
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That's very nice what you did.
Great respect.
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Old 06 July 2010, 14:38   #17
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Country: UK - England
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Quote:
Originally Posted by olekils View Post
I also put an inflatable beach-ball into the tube to hold it open which helped a lot, and which I could remove before the final bond.
That's a very neat idea
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Old 18 July 2010, 00:51   #18
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Country: USA
Town: Santa Barbara, CA
Boat name: Searider 4m + 5.4m
Make: Avon
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Just in the interest of keeping this going, I can report that the above mentioned repair is holding up well after 4 days in the water and probably about 40 miles in moderate seas. Unfortunately the other cone started coming apart now, and filled the tube up with about 20 gallons of water. In this case, the joint was in slightly better condition than the starboard one, but the material was still pretty shot, so I decided to make a 5" slit on the tube where the AVON logo used to be and apply a patch from the inside. This allowed me to keep the cone on the boat as I didn't want to go through re-gluing a cone again if at all avoidable.
I also made some triangular patches on the starboard side, and will put one over the internal repair on the port side as well. Ill try to upload some photos soon.
so far, this has been much easier than the full replacement, but it remains to be seen if and how it holds up....
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Old 19 July 2010, 20:03   #19
jpn
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Congratulations to the repair...I believe it successful, hope you can post some pic of it inflated...thanks
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Old 23 July 2010, 14:53   #20
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Here are a few photos:
1. The reinforcement patch on the SB side. I used some thick clear foil (available in painting stores to tape off walls) to pattern the piece such that it fits snugly against the overlapping hypalon bit that attaches the tube to the hull. This way, there is no edge for the water to spray against. When placing the patch down, I had a slight overlap which I cut down with a very sharp kitchen knife. Once trimmed, the patch laid down exactly next to the existing reinforcement making a smooth surface.
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