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speed difference between tacks |
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winging it
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Joined: 22 Mar 07 Online Status: Offline Posts: 3958 |
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Topic: speed difference between tacksPosted: 02 Jun 09 at 5:53pm |
I'd agree with this - if you're sailing on a header you think there is enough wind to keep yourself out on the wire, but there isn't because you're always heading away from the pressure. Sailing in a wind bend can have the same effect. I am sure someone more scientific than me can explain it better. |
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the same, but different...
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Garry
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Joined: 18 Apr 04 Location: United Kingdom Online Status: Offline Posts: 536 |
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Posted: 02 Jun 09 at 5:34pm |
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Checking your mast is straight is relatively easy, for one way look at: http://www.youtube.com/watch?v=cSyrc3QUssE - there is no sound worth listening to with this video clip. Garry |
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Garry
Lark 2252, Contender 298 www.cuckoos.eclipse.co.uk |
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hollandsd
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Joined: 12 Oct 06 Location: United Kingdom Online Status: Offline Posts: 853 |
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Posted: 02 Jun 09 at 1:01pm |
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sailing at hythe, i find that in certain conditions wiring is much easier on one tack than the other i found this was due to differing angle of the current pushing on the foil, if you get the current pushing the foils the wrong way then the boat feels awful, but if you get it right the gains that can be made are quite supprising.
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Laser 184084
Tasar 3501 RS600 698 RS600 782 |
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Jon Emmett
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Joined: 15 Mar 04 Location: United Kingdom Online Status: Offline Posts: 988 |
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Posted: 01 Jun 09 at 11:15pm |
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If it was easier to keep the crew out on one tack than the other it may well be a pressure difference (sailing into/away from more wind). Tidal differences are still relatively gradual.
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ellistine
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Joined: 06 Mar 08 Online Status: Offline Posts: 762 |
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Posted: 01 Jun 09 at 10:06pm |
I'll start to check but I don't reckon it's always a port or starboard tack that's quicker (ie boat problems). I'm pretty sure it varies. The Sunday just gone it was easier to keep the crew out on the trapeze one way than the other. It probably is the tide. Being new to sailing I've been ignoring it but I suppose I'll have to start paying attention to it. Edited by ellistine |
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Lukepiewalker
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Joined: 24 May 06 Location: United Kingdom Online Status: Offline Posts: 1341 |
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Posted: 01 Jun 09 at 9:57pm |
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Rather than 'stuck wind', I would go with 'stalled sail'
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Ex-Finn GBR533 "Pie Hard"
Ex-National 12 3253 "Seawitch" Ex-National 12 2961 "Curved Air" Ex-Mirror 59096 "Voodoo Chile" |
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Jon Emmett
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Posted: 01 Jun 09 at 8:01pm |
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I would disagree a tack where you are going straight into the chop is often slower than one where the chop is side on.
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NickA
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Joined: 30 Mar 05 Location: United Kingdom Online Status: Offline Posts: 784 |
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Posted: 01 Jun 09 at 6:38pm |
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If it's ALWAYS faster on one side than the other then it isn't tide or direction of chop or "stuck wind" (really ???) surely. Probably different length shrouds or lowers (measure them & check which hole in the shroud plate they're in) or failing that a rudder that isn't hung quite vertical or a warped centreboard. Boat builders aren't always exact in their placement of cleats, blocks and fairleads either Anything that's not symetric could do it. Including your crew's legs probably! |
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Javelin 558
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Hector
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Joined: 10 May 04 Location: Otley, Yorkshire Online Status: Offline Posts: 750 |
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Posted: 01 Jun 09 at 5:46pm |
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Sailing on a lift almost always feels better than a backer.
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ChrisJ
Far too distracted from work
Joined: 07 May 04 Location: United Kingdom Online Status: Offline Posts: 337 |
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Posted: 01 Jun 09 at 4:13pm |
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Sometimes, the wind can get "stuck" in the sail: too much kicker / mainsheet tension / battern tension / fullness in the sail etc. You don't need much "too much" for the boat to be saiing slower than it could. Then you tack / gybe, and shake all the wind out, re-sheet, re-angle the boat, pick a wind shift, and get moving again. Happens ALL the time inland! |
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