Rossiter Pintail Mortagne sur Gironde, near Bordeaux |
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Laser 140101 Tynemouth |
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Laser 28 - Excellent example of this great design Hamble le rice |
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List classes of boat for sale |
Dinghy hull coatings |
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iitick ![]() Far too distracted from work ![]() Joined: 09 Sep 13 Location: Tunstead Milton Online Status: Offline Posts: 392 |
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The 'boy' cleans his ancient Lightning hull with brillo before every big race....dosent seem to do the old girl any harm........
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iGRF ![]() Really should get out more ![]() ![]() Joined: 07 Mar 11 Location: Hythe Online Status: Offline Posts: 6499 |
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I thought we discussed this once before and it was concluded that what are they hydrophilic or hydrophobic compounds were illegal.
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Aching Knees ![]() Newbie ![]() Joined: 04 Jan 10 Online Status: Offline Posts: 11 |
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Bring back graphspeed, the black graphite paint or international smooothie, the pink stuff
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Presuming Ed ![]() Really should get out more ![]() Joined: 26 Feb 05 Location: United Kingdom Online Status: Offline Posts: 641 |
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Riblets. 87 by Stars & Stripes. Also, IIRC, used by Oxford in the 87 boat race (the year of the mutiny). Edited by Presuming Ed - 12 Dec 13 at 7:32am |
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Dougal ![]() Really should get out more ![]() ![]() Joined: 23 Sep 09 Location: England Online Status: Offline Posts: 556 |
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Thank you - that's exactly what I was talking about.
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What could possibly go wrong?
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JimC ![]() Really should get out more ![]() ![]() Joined: 17 May 04 Location: United Kingdom Online Status: Offline Posts: 6662 |
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I understood the riblets had to be precisely aligned with the local waterflow, and were only really useful within a limited speed range. Its no good kidding yourself that leaving the hull rough will have the same effect...
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Dougal ![]() Really should get out more ![]() ![]() Joined: 23 Sep 09 Location: England Online Status: Offline Posts: 556 |
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Yes - there was a large amount of precision involved. It may even have been in a Y&Y article, but I recall the riblets were applied by way of a laminate stuck onto the hull, with the grooves/ridges being in a wavy pattern and being lined up precisely with the contours of the hull. Anyone know if the technology is still being used in boats? If it worked it would seem a prime candidate for the foils on the AC72's.
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What could possibly go wrong?
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sandgrounder ![]() Far too distracted from work ![]() Joined: 01 Apr 11 Online Status: Offline Posts: 220 |
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I never cease to be amazed by the constant focus on hull finish, whilst ignoring foil finish, where the bigger gains are to be made.
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Rupert ![]() Really should get out more ![]() Joined: 11 Aug 04 Location: Whitefriars sc Online Status: Offline Posts: 8956 |
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Highly polished centreboards are always fun to watch after a capsize!
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Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686
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Reuben T ![]() Groupie ![]() ![]() Joined: 22 Mar 13 Location: Lyme Regis Online Status: Offline Posts: 74 |
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I have heard that sanding to around 600 grit is the most efficient finish as it creates a boundary layer of water moving with the boat, so it effectively lubricates the hull with water. I was told this by a friend of Phil Morrison who said this was a theory that Phil believed in, therefore I am inclined to believe it.
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