Laser 161752 Tynemouth |
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Laser 28 - Excellent example of this great design Hamble le rice |
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Laser 140101 Tynemouth |
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List classes of boat for sale |
Mast Head T Foil? |
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Medway Maniac ![]() Really should get out more ![]() ![]() Joined: 13 May 05 Location: United Kingdom Online Status: Offline Posts: 2788 |
![]() ![]() ![]() ![]() Posted: 03 Nov 14 at 10:12am |
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Mr Oakley's winglets were indeed tiny. I remember thinking at the time that they probably lay almost completely in the wake of the mast. Not that that necessarily makes them completely worthless - splitter plates can do much to damp down a turbulent wake (that's probably what the headboard is already doing), but any effect of those winglets would be negligible, I'd have thought. As to the jib end plate, that's probably the last place I'd bother. The mainsail will likely already be extracting some energy from the jib's tip vortex, much as geese use each other when flying in echelon. |
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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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So, returning from my nightmare moving house experience for a moments reality, what we appear to be saying is, whilst not a necessary improvement that could be derived by just extending the mast, it doesn't disadvantage and in the cases of restricted mast height could bring advantage, as well as providing some safety benefit as a mast head float. So not a totally silly idea, maybe worth pursuing down the path a way, and when not using it as a mast head foil you could always attach lines to it and use it as a trainer kite.
![]() Edited by iGRF - 03 Nov 14 at 9:08am |
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MerlinMags ![]() Admin Group ![]() ![]() Joined: 19 Mar 04 Location: UK, Guildford Online Status: Offline Posts: 588 |
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John Oakley was also known for his showmanship, and occasionally making people believe he was doing something to get a speed edge (when it was all baloney).
Here's the Lumix skiff article in case anyone wants to see the picture of the plate on the top of the jib (scroll down for a close up). http://www.yachtsandyachting.com/news/167884/Lumix-wing-mast |
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OultonBen ![]() Groupie ![]() Joined: 04 Oct 11 Location: United Kingdom Online Status: Offline Posts: 49 |
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Winglets has been done already .... in 1970's ... ish !
John Oakley had them on his mainsails when he started his loft in Fareham (I can't remember the loft name & it was taken over after a relatively short period). He was full of innovation and designed a lightweight cloth front third, and heavier weight up the leech (sails looked peculiar/interesting with the scalloped join between light & heavy cloths). His Winglets were made of plastic 90º angle, as part of the headboard, not very big at all; lots of benefit claims, but little hard evidence.
Edited by OultonBen - 02 Nov 14 at 7:28pm |
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No-one can squeeze past ..... when you're as "Chunky" as myself !
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Yes! That's it, it even has end plates!
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Medway Maniac ![]() Really should get out more ![]() ![]() Joined: 13 May 05 Location: United Kingdom Online Status: Offline Posts: 2788 |
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Click on "Mosaics" in the second one to see the figures. Fig 1 shows your idea, plus winglets/an endplate and amid-span fence.
It is amazing what people will patent, and often without building/trying out the idea first, which would sometimes be cheaper than and obviate the patenting process... |
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Yes, like the first one. So the top of the rig is on starboard and the bottom on port. Amazing the things people patent, isn't it? |
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fab100 ![]() Really should get out more ![]() ![]() Joined: 15 Mar 11 Online Status: Offline Posts: 1005 |
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Will the winglet need a winglet?
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hobbiteater ![]() Posting king ![]() Joined: 07 Dec 12 Location: United Kingdom Online Status: Offline Posts: 107 |
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unfortunately not even close to being aerodynamically symmetrical even if it looks similar geometrically.
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mole ![]() Groupie ![]() Joined: 02 Feb 06 Location: United Kingdom Online Status: Offline Posts: 43 |
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These model yacht guys have been doing it for some time.
http://www.users.on.net/~malcolmandjane/750/750picsJ.html Edited by MerlinMags - 03 Nov 14 at 7:48am |
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