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Leaking bouyancy tanks

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2 years 9 months ago #43 by ARCHIE
ARCHIE created the topic: Leaking bouyancy tanks
Hi

My wooden Grad 2076 gets water in both front and rear tanks. On a normal sail its perhaps a few sponges worth but if I capsize then its much much more. This suggests it leaks from the cockpit/bath! into the tanks. Any tips for finding the leaks and repairing?

As a side issue it takes me about 15mins sailing with self bailers to drain the boat after any capsize. There is just so much water that my race is over. Sail single handed so no crew to hand bail. Any tips apart from don't capsize!

Thanks Archie

Archie - Starfish 2076

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2 years 9 months ago #44 by Stewart
Stewart replied the topic: Leaking bouyancy tanks
Worrying if it leaks without a capsize. Leaky joints or maybe through fittings. When I had a leaky boat I fitted a hatch cover with a compression fitting, hooked up a pump (blowing) and painted all the joints with a soapy solution. A bit risky as it might make things worse.

Regarding reducing water aboard, if you right the boat from the water ie pull on the board from the water, don't stand on it, that might reduce the water taken on-a popular Solo trick. Try it under controlled conditions! But ultimately, that's why side tanks were invented. You could fit side tanks, but it would be cheaper to buy a newer boat!

I recently capsized in a Rooster-I was crewing, stepped over the side onto the board, waited for the helm to reach the boat and hold on, righted it (got my ankles wet but you can't have everything) pulled Mr D Wilson aboard and off we went with maybe 6" of water in the boat. Empty by the next mark. That's design progress.

Graduate 2880 "Stinger"
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2 years 9 months ago #45 by ARCHIE
ARCHIE replied the topic: Leaking bouyancy tanks
Hi Stewart thanks for the detailed reply. Sorry for the delay but my automatic focum notifications were going to Junk email so I hadn't noticed this.

The idea of a compression fitting and soapy water sounds good I try that.

Regarding righting the boat is the thought that by pulling slowly on the centre board from the water rather than standing you aren't forcing everything down into the water? Truth is I do more often than not manage to clamber over the edge and stand on the board so I'll try getting wet and see what happens.

I've got the Anderson Super Mini sized self-bailers on the boat... they are 110mm long (that is the external flange length so hole is much smaller. Any idea what size/model of self bailer the later boats use... I was wondering if going up a size or two may held but worried you need extra speed to get the suction effect working properly.

Archie

Archie - Starfish 2076

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2 years 8 months ago #54 by ARCHIE
ARCHIE replied the topic: Leaking bouyancy tanks
Hi Stewart

I tried your trick of pulling slowly on centreboard from the water and it does indeed seem to take on less water that way. Thanks!

I also found this on the old forum graduatedinghy.com/graduatedinghyforum/viewtopic.php?f=6&t=23 regarding getting rid of the rear tank and wondered if anything had ever been done on an older boat that you are aware of?

Archie - Starfish 2076

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2 years 8 months ago #56 by Stewart
Stewart replied the topic: Leaking bouyancy tanks
Yes-a prototype double bottomed Grad with no rear tank was constructed from an old hull by David Wilson. It looked great-but was very difficult to sail due to the lack of space between the floor and the boom. Project abandoned. The Grad has too much rocker to make transom draining work

The latest wooden boat, 3018, has a reduced length aft tank and seems to work OK. . So I guess you could alter your boat, but it might not look great!

Graduate 2880 "Stinger"

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2 years 8 months ago #57 by ARCHIE
ARCHIE replied the topic: Leaking bouyancy tanks
Thanks Stewart. I think probably just some larger self bailers this winter then. Cheers

Archie - Starfish 2076

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