Laser 140101 Tynemouth |
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Laser 28 - Excellent example of this great design Hamble le rice |
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Rossiter Pintail Mortagne sur Gironde, near Bordeaux |
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The Tasar v the Icon |
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![]() ![]() ![]() ![]() Posted: 18 Jul 14 at 11:42am |
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The Tasar was so far ahead of its time. I only sold mine this year. It had been renovated well, but 38 years old, underweight and stiff as a board - went like the clappers. They go unfeasibly quickly round a course with a small sail area and are still winning series at my club. The mast was a thing of genius - adjustable power on a handle!
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boatshed ![]() Far too distracted from work ![]() Joined: 12 Apr 05 Online Status: Offline Posts: 457 |
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The Tasar mast can be over rotated so that it's leading edge ( it is a wing mast with the back cut off **) points at the optimum direction into the apparent wind.
But it is a bit more clever than that. The mast is quite flexible side ways and when rotated it tends to pull the top of the mast to windward. At the same time the upper leach can be controlled to twist a bit a prevent hooking. Bethwaite describes it like a bird that dips it's wing tips down. This makes the main sail very, very efficient. I've often wondered if this old aluminium, rotating, semi-wing mast is more efficient than a modern, thin, fixed, carbon stick, as on the Icon. For sure it is far more efficient than a fixed aluminium mast. I think the extrusion dies for the Tasar mast were very expensive. Edit ** It is even more clever since the sharp cut off edge at the rear of the mast acts to induce turbulent flow over the sail which is more efficient for slow speed aerodynamics, like a sail, since the flow stays attached for much longer than with laminar flow. Aircraft use trip turbulators to achieve the same thing when coming into land. They trip the flow from laminar to turbulent. Edited by boatshed - 18 Jul 14 at 11:42am |
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Steve
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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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Thanks for that Jim, I've printed it off and I'll have another read of it myself tonight, lots of interesting stuff in that, and I'll give it to her at the demo this weekend, we're still hopeful of having an Icon to put up against it.
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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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Its basically a limiter for the mast rotation. The mast, very roughly speaking, is lined up with the angle of the mainsail luff, so rotates further than the boom. The pressure from the kicking strap tends to rotate the mast too far, so the metal loop engages with a fitting on the boom and stops the mast rotating further than the correct upwind setting.
When tacking the mast has to be pulled across - no practical way of automating it because it has to go through the centre against the kicker load. However with a similar rig I found it easiest to grab the handle and pull myself across the boat with it as I changed sides in the tack, killing two birds with one stone. Once I was used to doing that it really didn't add any complication to the tack. If you do miss it then provided legs are long enough then push it across with a foot post tack. This might help. http://www.westcoastsailing.net/media/pdf/tasar/tasarmanual3_principlesofdesign.pdf Edited by JimC - 18 Jul 14 at 10:59am |
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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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Well wednesday afternoon I had a great battle with the Tasar, down at the lake, the girls who normally sail a Snipe were racing it and we chopped and changed places screwing each other up whilst my normal Laser nemesis headed off to the horizon, but what a fun race it was. She is a very good racing windsurfer who also has a fair talent at the helm of a dinghy, She had me wrong siding marks, I was sailing her way past the bear off point and all manner of normal team sailing nonsense it was fun, then I had a good look at it.
She'd been running the jib by the lee, which kind of works for her in the Snipe but didn't seem to be working so well and she pointed out the 'spanner' she'd had some problems with. WTF? said I 'does that do?', well you put it here and here she said which seemed to be exactly opposite to what I'd do with it. It's some sort of boom locking device, the mast is a nice aero shape which twists, but it appears you have to lock and unlock then reset this spanner thing every tack, I meant to take a picture and get the whole sp from someone on here, to help her for next time. (I do actually give her tactical hints and tips as we're going round) So if someone could elaborate we'd both be very appreciative, it's quite complicated and clunky but I'm sure things would work better for her if it was just locked off and left so she can keep her head out of the boat to watch out for dodgy old gits snaking her at marks.. Edited by iGRF - 18 Jul 14 at 10:18am |
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Blue One ![]() Far too distracted from work ![]() Joined: 09 Nov 13 Online Status: Offline Posts: 317 |
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+1
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Null ![]() Really should get out more ![]() Joined: 11 May 14 Online Status: Offline Posts: 745 |
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Graeme, you need to select your events wisely. I find i get so much more out of travelling to events now i dont travel every oither weekend. The Lord Birkett is a prime example. Worth every minute of the 7 hour drive for me this year. The result is secondary to the warm glow i get being part of what is a celebration of sailing. It really is lightyears ahead of events like the Bloody Mary etc. Plus its one of the few 'Proper Parties' left in dinghy sailing (IMNHO)
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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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Well, I'm done with them already so we'll have to beg to differ, I prefer sailing at my home club(s) I might have a look at one of the big handicaps one day, I've always fancied taking the nosebleed trip up North to see Lester & other ex windsurfing pals at the Lord Birkett and maybe if there were something similar down here I might have a look, but it'll need to be bread knife friendly (Which Poole most definitely wasn't). I spent years away at Nationals of one description or another and this part of our lives together is supposed to be a bit more considerate. The FOM taking place on her birthday really racked up the brownie points - Not.
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boatbasher ![]() Groupie ![]() Joined: 17 Aug 12 Online Status: Offline Posts: 76 |
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For a man of such limited experience you have some strong opinions ... I'd suggest you try some more events; not all championships are like that RS100 event you describe. Championships weeks(ends) are some of the most fun and sociable holidays I have ever had ... |
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fab100 ![]() Really should get out more ![]() ![]() Joined: 15 Mar 11 Online Status: Offline Posts: 1005 |
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Well that explains for your expertise, such a rock solid foundation of experience on what dinghy events are really like, three (in how many years, 10?) being a perfectly valid statistical sample as any fule kno
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