J24 (Sail No. 4239) Dartmouth |
29er GBR 074 Tynemouth |
Laurent Giles 'Jolly Boat' Exeter |
List classes of boat for sale |
Older Classes With Modern Rigs |
Post Reply | Page <12345 7> |
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423zero
Really should get out more Joined: 08 Jan 15 Location: United Kingdom Online Status: Online Posts: 3406 |
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Quote Reply
Topic: Older Classes With Modern Rigs Posted: 26 Jun 20 at 9:56am |
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He is trying to get people to change boats like they do their cars, a updated car or different make, he doesn't get the sense of belonging to something, to meet and make friends and promote your organisation.
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Robert
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Sam.Spoons
Really should get out more Joined: 07 Mar 12 Location: Manchester UK Online Status: Offline Posts: 3398 |
Post Options Quote Reply Posted: 26 Jun 20 at 10:21am | ||
They've been around for a long time but there are sound aero reasons for doing so.
The 'modern' rigs I have sailed recently (Blaze and Spice primarily) get leech tension from the mainsheet upwind meaning you can keep the boat on it's feet by releasing leech tension and allowing the head twist and spill excess power. Some boats do the same by playing the kicker but that seems inefficient to me.
I agree 100% about the Europe, delightful boat. I think you, like me, have a soft spot for those old unstayed rigs ad the Lightning 368 has one too
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Spice 346 "Flat Broke"
Blaze 671 "supersonic soap dish" |
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JimC
Really should get out more Joined: 17 May 04 Location: United Kingdom Online Status: Offline Posts: 6649 |
Post Options Quote Reply Posted: 26 Jun 20 at 10:40am | ||
Worth looking at this:-
https://www.wb-sails.fi/en/sailmakers-log/rio-development You can see how that clew corner of the sail is just in a turbulent mess contributing little. I know people talk about end plate effects, but all the big pressure differences are at the luff end of the sail. As said before droopy booms are associated with one designs where the leech length is fixed and the mast rake has increased over the years. See any droopy booms on Moths, 18s or high performance catamarans where they don't have a one design sail? Edited by JimC - 26 Jun 20 at 10:41am |
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KazRob
Far too distracted from work Joined: 22 Oct 16 Location: Scotland Online Status: Offline Posts: 245 |
Post Options Quote Reply Posted: 26 Jun 20 at 10:47am | ||
Jim - but you do see deck sweeper sails on Moths and A class cats to get the end plate effect but still leave room to get underneath it as they don't have a cockpit as such.
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OK 2249
D-1 138 |
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Oatsandbeans
Far too distracted from work Joined: 19 Sep 05 Location: United Kingdom Online Status: Offline Posts: 382 |
Post Options Quote Reply Posted: 26 Jun 20 at 10:57am | ||
I agree that the "end plate effect" is over-rated in most small dinghies. I suspect that if you had a tell tale on the bottom of the boom it would show that the air flow across from the windward side to the leeward side, under the boom, is non existent,but it would show you how disturbed the air flow is generally in that area.
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Rupert
Really should get out more Joined: 11 Aug 04 Location: Whitefriars sc Online Status: Offline Posts: 8956 |
Post Options Quote Reply Posted: 26 Jun 20 at 11:49am | ||
Adjusting mast rake for the wind strength and then dumping the boom at a specific position on the transom by playing the traveller gives you very repeatable leech tension and sheeting angle.
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Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686
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Rupert
Really should get out more Joined: 11 Aug 04 Location: Whitefriars sc Online Status: Offline Posts: 8956 |
Post Options Quote Reply Posted: 26 Jun 20 at 11:51am | ||
Do Finn, OK, Europe, Contender have a set leech length, or just a maximum?
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Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686
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Neptune
Really should get out more Joined: 08 Jun 09 Location: Berkshire United Kingdom Online Status: Offline Posts: 1313 |
Post Options Quote Reply Posted: 26 Jun 20 at 1:29pm | ||
Nothing said so far makes me want to step out of my 25yr old design 300. The rig works well, you don’t play the kicker to ‘spill wind’ the rig flexes to do that; dumping the main to control tension isn’t very efficient and you also then make the mainsail deeper.
You can walk across easily without worrying about the boom height, the hiking position is comfortable, the boats manouverable and you really can carve it through a gybe in pretty much anything that is sensible to be sailing in. The fact that it’s performance still outshines most newer boats says the the concept is pretty much spot on... without it needing to be reinvented!
Edited by Neptune - 26 Jun 20 at 1:29pm |
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Musto Skiff and Solo sailor
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Paramedic
Really should get out more Joined: 27 Jan 06 Location: United Kingdom Online Status: Offline Posts: 929 |
Post Options Quote Reply Posted: 26 Jun 20 at 3:43pm | ||
From memory the OK has a maximum and its tight on "fast" sails. Its been a while since I measured one, but if there is a minimum its never been explored on the sails I've measured! The contender leech I understand is nowhere near maximum because if it was it would be unsailable
Edited by Paramedic - 26 Jun 20 at 3:44pm |
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iGRF
Really should get out more Joined: 07 Mar 11 Location: Hythe Online Status: Offline Posts: 6496 |
Post Options Quote Reply Posted: 26 Jun 20 at 4:34pm | ||
Thanks for reminding me lass, it's 25kgs, it's been a while since I had to study health and safety in the workplace. Either way, if dinghys were stock you wouldn't be able to move them on your own without an assisting device. |
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