Foil Quality
Printed From: Yachts and Yachting Online
Category: Dinghy classes
Forum Name: Dinghy development
Forum Discription: The latest moves in the dinghy market
URL: http://www.yachtsandyachting.com/forum/forum_posts.asp?TID=13471
Printed Date: 28 Jun 25 at 5:52pm
Software Version: Web Wiz Forums 9.665y - http://www.webwizforums.com
Topic: Foil Quality
Posted By: epicfail
Subject: Foil Quality
Date Posted: 02 Dec 19 at 1:52pm
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How critical is the quality / finish of a daggerboard for boat speed - does it really make much difference if it's not lovely and smooth?
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Replies:
Posted By: Rupert
Date Posted: 02 Dec 19 at 2:13pm
Big surface area, so yes. But it is a small part of the whole picture, so get it all right, and you notice the difference.
Also, headology shouldn't be underestimated. Nice kit makes you think your boat is fast, which in turn gives confidence which makes you sail fast.
On the other hand, I sail knackered old boats and enjoy it, so what the hell!
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Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686
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Posted By: tink
Date Posted: 02 Dec 19 at 7:32pm
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Bethwaite says as smooth as you can possibly get them.
Leading edge is the most important part
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Tink
https://tinkboats.com
http://proasail.blogspot.com
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Posted By: epicfail
Date Posted: 02 Dec 19 at 7:46pm
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I'm a recently returnee dinghy sailor doing a bit of Sunday handicap racing, sailing an aged Europe with a daggerboard formed from a plank of ply. Not sure the term edge applies to either the leading or trailing end...somewhat blunt. I'll have to see about sorting it. I need all the speed I can get!
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Posted By: JimC
Date Posted: 02 Dec 19 at 8:14pm
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Ply daggerboards are problematic - shape them too much and they break, because most of the strength is in the outer layer of ply, and when you shape it you remove most of it. Sometimes the best thing to do is just to paint it and smooth it as well as you can. Its a depressing amount of work (or alternatively very depressing amount of cash) to make a better board.
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Posted By: 423zero
Date Posted: 02 Dec 19 at 9:04pm
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This is centre board from my Sprint, ply with approx' 1/8" of Gel coat on the surface, finished with 2 pack white gloss, took about 6 months, you need to leave each coat as long as you can.This is a simple 'Spitfire' wing shaped board.
https://i1149.photobucket.com/albums/o587/aquabatdinghy/Minisprint%20rebuild/WP_20150602_19_02_15_Pro.jpg
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Robert
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Posted By: getafix
Date Posted: 10 Dec 19 at 1:47pm
Originally posted by 423zero
This is centre board from my Sprint, ply with approx' 1/8" of Gel coat on the surface, finished with 2 pack white gloss, took about 6 months, you need to leave each coat as long as you can.This is a simple 'Spitfire' wing shaped board.
https://i1149.photobucket.com/albums/o587/aquabatdinghy/Minisprint%20rebuild/WP_20150602_19_02_15_Pro.jpg
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interesting that the pivot bolt (presumably) goes in to the groove rather than through the foil inside the case - any pics of that in the boat, I guess there must be some kind of mechanism that enables friction to keep the foil 'falling' or being pulled through?
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Posted By: 423zero
Date Posted: 10 Dec 19 at 2:31pm
Hi Getafix,
The pivot bolt is moulded into centre board case, you put slot over bolt and held in place with a 4" brass screw.
https://s1149.photobucket.com/user/aquabatdinghy/media/Minisprint%20rebuild/IMG-20140216-00019.jpg.html?sort=4&o=28" rel="nofollow - https://s1149.photobucket.com/user/aquabatdinghy/media/Minisprint%20rebuild/IMG-20140216-00019.jpg.html?sort=4&o=28
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Robert
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Posted By: getafix
Date Posted: 10 Dec 19 at 9:59pm
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Thanks, refurbished foil looks great. Happy Minisprinting, can you help me remember the difference between the MS and the Toy?
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Posted By: 423zero
Date Posted: 10 Dec 19 at 10:15pm
Only seen a Toy once, that was a few years ago at Staunton Harold, a CVRDA event, more of a racing dinghy than Sprint, which is a beach boat really.
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Robert
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Posted By: tink
Date Posted: 10 Dec 19 at 10:15pm
Completely different boat MS is a variant of the Mini Sail, Toy is longer, bigger sail area
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Tink
https://tinkboats.com
http://proasail.blogspot.com
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Posted By: 423zero
Date Posted: 11 Dec 19 at 7:09am
Getafix,
Board is held in the down position by bungee, lifted by cord and locked into position by cleats, when you hit underwater objects board gets pushed back against bungee resistance, good with weeds too, when the drag becomes sufficient board goes further back until weed slides off.
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Robert
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