| self rasing daggerboards #94414 01/04/07 12:03 AM 01/04/07 12:03 AM |
Joined: Jun 2006 Posts: 177 Sydney/Northern Beaches Bandit OP
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Posts: 177 Sydney/Northern Beaches | I am thinking of modifing my daggerboards to be raised by rope from across the tramp. I already know of the cut groove system but I dont want to risk weakening my boards. I thought I might try a thin cloth material about 1cm wide to run down the leading edge and glue and fasten it 160mm past half way point on the boards to be able to raise them completely. This cloth would go through the raising pully and tie onto rope to extend across the tramp.
Has anybody tried this or another variation to this method? Any recommendations of the thin strip cloth like material that needs to wrap nicely to the leading edge and feed through a pulley.
Sail 1635
Blue Tongue
| | | Re: self rasing daggerboards
[Re: Bandit]
#94416 01/04/07 03:05 AM 01/04/07 03:05 AM |
Joined: Jun 2001 Posts: 9,582 North-West Europe Wouter
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Posts: 9,582 North-West Europe | I already know of the cut groove system but I dont want to risk weakening my boards. I thought I might try a thin cloth material about 1cm wide to run down the leading edge and glue and fasten it 160mm past half way point on the boards to be able to raise them completely. This cloth would go through the raising pully and tie onto rope to extend across the tramp.
Actually this year I saw just such a sysem introduced to the EU Blade F16's. It was first tried on some A-cats I believe. It seems to work well. The tape is however glued to the boards somewhere in the middle of the cord and not the leading egde. I didn't ask about the exact type of type material used. It was woven but felt smooth nevertheless. I don't think a pully or block was even used. The tape just rested on the hull and that was it. But I'll have to check. Won't be able to do that till sailing season starts here in EU, april 2007. Wouter
Wouter Hijink Formula 16 NED 243 (one-off; homebuild) The Netherlands
| | | Re: self rasing daggerboards
[Re: warbird]
#94418 01/04/07 04:48 AM 01/04/07 04:48 AM |
Joined: Sep 2006 Posts: 393 Camden NSW wildtoy
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Posts: 393 Camden NSW | hey there Bandit, Was on Stephens F18 which has a 1cm thick piece of material about half way down and he doesnt use a puly system or anything like that it just sits there. Alot easier to pull the boards up with this type of system rather than the manual lifting system. The system on his boat must be alright considering its a capricorn Cheers Will | | | Re: self rasing daggerboards
[Re: Bandit]
#94420 01/04/07 04:53 AM 01/04/07 04:53 AM |
Joined: Sep 2006 Posts: 393 Camden NSW wildtoy
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Posts: 393 Camden NSW | Stephen just has some type of carpet like material to slide alond and it seens to work really well. Had no trouble bringing the boards up. Seriously thinking about trying on the mossie. | | | Re: self rasing daggerboards
[Re: Bandit]
#94421 01/04/07 04:54 AM 01/04/07 04:54 AM |
Joined: Jun 2006 Posts: 265 Sydney AUST becjm
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Posts: 265 Sydney AUST | Can you make it so that when one is down the others up? Connected so all you have to do is push one down when you tack?
---Ben Cutmore--- --MOSQUITO 1704--
| | | Re: self rasing daggerboards
[Re: becjm]
#94422 01/04/07 05:01 AM 01/04/07 05:01 AM |
Joined: Sep 2006 Posts: 393 Camden NSW wildtoy
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Posts: 393 Camden NSW | A little bit of engineering and testing Im sure you'll be able to do something of the sort. Make single handed sailing alot easier.
William | | | Re: self rasing daggerboards
[Re: Tornado_ALIVE]
#94424 01/04/07 06:35 AM 01/04/07 06:35 AM |
Joined: Jun 2006 Posts: 177 Sydney/Northern Beaches Bandit OP
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Posts: 177 Sydney/Northern Beaches | Thats the idea I was looking for. Next question what is the strip made of. I was thinking a rubber strip that goes directly across to the other board applying stretch when the boards are down. You could then release the rope that pulls the boards down and thay could pop up automatically.
Sail 1635
Blue Tongue
| | | Re: self rasing daggerboards
[Re: becjm]
#94426 01/04/07 06:47 AM 01/04/07 06:47 AM |
Joined: Apr 2003 Posts: 1,669 Melbourne, Australia Tornado_ALIVE
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Posts: 1,669 Melbourne, Australia | Can you make it so that when one is down the others up? Connected so all you have to do is push one down when you tack? Our cats are designed to utilise both boards when going upwind and need pretty much the full area of both. Try sailing with only 1 board and note results. We shattered a c/board in the first race of our states (first lap) and raced the remaining regatta with only 1 board. No Port tack without starboard board..... We slid sideways a LOT. If we flew the hull too high, we lost a lot of ground. On the other tack we made better headway but still slid sideways a bit compared to boats around us. | | | Re: self rasing daggerboards
[Re: Tornado_ALIVE]
#94427 01/04/07 07:04 AM 01/04/07 07:04 AM |
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Posts: 177 Sydney/Northern Beaches | Thanks for the info I like my rubber idea but I am not sure how well it will work so I'll give it a go and if it doesn't work I will end up using the webbing. The next big problem is a strong bonding from the strip to the board. Any recomendations out there?
Sail 1635
Blue Tongue
| | | Re: self rasing daggerboards
[Re: Tornado_ALIVE]
#94429 01/04/07 07:16 AM 01/04/07 07:16 AM |
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Posts: 177 Sydney/Northern Beaches | Thanks for that Steve I have a clearer picture of what I want to do. I'll use the webbing as it will absorb resin better than rubber. To save my auto raising idea I might run the webbing under the tramp and connect it to a strong bungee to pull them up. This will rely heavilly on the how freely the boards lift up.
Sail 1635
Blue Tongue
| | | Re: self rasing daggerboards
[Re: MauganN20]
#94432 01/04/07 09:56 AM 01/04/07 09:56 AM |
Joined: Jun 2001 Posts: 9,582 North-West Europe Wouter
Carpal Tunnel
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Standard feature on homebuild Taipans. Sadly they do also pop up during tacks and such. That is why quickly all kinds of friction devices are fitted to keep the boards down.
Wouter
Wouter Hijink Formula 16 NED 243 (one-off; homebuild) The Netherlands
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