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TOPIC: Hull repair

Hull repair 5 years 11 months ago #531

  • ajg76
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So yesterday I was enjoying my first sail of the year. Wind was good, waves were big but not too big and the dolphin were out (nothing quite like going up the beat with an escort of dolphin playing around your boat).

through the races I was noticing a creeking noise that I just put down to settling in after a winter in the shed. Unfortunately I get ashore and find that one of the front wing tubes is starting to pull its fixing out through the deck (not just the screw/bolt coming out of the deck)with some gel coat cracking, noticable flexing of the deck and movement of the tube.

Can anyone advise if this is possible to fix and if so how. Best course that we could come up with in the compound after the fact was to put a hatch in the foredeck to get access, layer some glass over the area on the inside and then attach a length of hardwood to strengthen.

Any thoughts/advice gratefully received.

Andrew
Andrew Grant
Blaze/Halo 814
Aberdeen&Stonehaven YC...
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Re: Hull repair 5 years 11 months ago #533

  • Cirrus
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The best repair is to put 2 x hatches in the front of the cockpit - one each side under the tubes. This will give you access to the inside of the hull in the areas you need to access. It also means the hull can be aired much more easily in future.

What sounds like is happening is that the brass plate that is bonded into the GRP (and then threaded so you can attach the wing inboard end to it with a machine screw ) is pulling out.

Once you have internal access you can simply drill through what remains of the plate and GRP below it and bolt (with a penny washer on the inside) the wing into place. It would be worth making good any damaged GRP and maybe putting a pad of extra glass on the inside first.

Sounds alarming but not a particularly difficult repair... Later versions of the hull have longer 'fixed' tubes and different enginneering but the Mk1/2 approach rarely fails so you problem is not that common.

Give me a call if you want more help / advice.

Cheers - Mike L. (Cirrus Raceboats)
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Re: Hull repair 5 years 11 months ago #535

  • Blaze742
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Hi,

When I did a similar repair myself, I put an aluminum load spreader plate in under the penny washer (bought a piece of aluminum extrution from B & Q), and a piece of rubber (piece of old bike innner tube) between the inside of the hull and the aluminum to allow for the uneven surface of the inside and help spread the load.

Worked well.
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