Talking Dirty.... Wind

   I am giving a talk to the yoof of the parish and the subject I have chosen is Dirty Wind. It’s a topic that is often mentioned in coaching talks but the quickly scribbled diagrams do not explain well. It is definitely a subject of its own.
My working title is ‘Dirty Wind and other Stuff’- how to recognise it/understand it/avoid it/use it to your advantage.
IMO  the term DW  only includes turbulent wind and does not cover the full gambit of ‘modified’ wind caused by a rig eg. the lee bow effect. Do you agree? If so is there an all embracing term? I had the suggestion ‘In the Sh1t’. Yea that works well!
I have a few photo sequences showing the effects of DW. But if you have any links to useful video/photo please post them here esp. fleet effects.
Thanks

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Strangler Send Private Message Find Member's Posts Posting king Joined: 24 Mar 06 Location: United Kingdom Online Status: Offline Posts: 154	Post Options Post Reply Quote Strangler Report Post Quote Reply Topic: Talking Dirty.... Wind Posted: 04 Mar 12 at 7:09pm
	I am giving a talk to the yoof of the parish and the subject I have chosen is Dirty Wind. It’s a topic that is often mentioned in coaching talks but the quickly scribbled diagrams do not explain well. It is definitely a subject of its own. My working title is ‘Dirty Wind and other Stuff’- how to recognise it/understand it/avoid it/use it to your advantage. IMO the term DW only includes turbulent wind and does not cover the full gambit of ‘modified’ wind caused by a rig eg. the lee bow effect. Do you agree? If so is there an all embracing term? I had the suggestion ‘In the Sh1t’. Yea that works well! I have a few photo sequences showing the effects of DW. But if you have any links to useful video/photo please post them here esp. fleet effects. Thanks

SoggyBadger Send Private Message Find Member's Posts Really should get out more Joined: 26 Oct 10 Location: The Wild Wood Online Status: Offline Posts: 552	Post Options Post Reply Quote SoggyBadger Report Post Quote Reply Posted: 04 Mar 12 at 7:14pm
	To me dirty wind has always included things like the lee bow effect.
	Best wishes from deep in the woods SB

RS400atC Send Private Message Find Member's Posts Really should get out more Joined: 04 Dec 08 Online Status: Offline Posts: 3011	Post Options Post Reply Quote RS400atC Report Post Quote Reply Posted: 04 Mar 12 at 7:38pm
	That rather depends what you mean by the 'Lee Bow Effect'. To many people it refers to something else entirely, the effect of current on the lee bow.

Strangler Send Private Message Find Member's Posts Posting king Joined: 24 Mar 06 Location: United Kingdom Online Status: Offline Posts: 154	Post Options Post Reply Quote Strangler Report Post Quote Reply Posted: 04 Mar 12 at 7:47pm
	Yes thats another meaning but we are talking wind here.

SoggyBadger Send Private Message Find Member's Posts Really should get out more Joined: 26 Oct 10 Location: The Wild Wood Online Status: Offline Posts: 552	Post Options Post Reply Quote SoggyBadger Report Post Quote Reply Posted: 04 Mar 12 at 7:57pm
	Yes I was referring to wind bending/disturbance as well.
	Best wishes from deep in the woods SB

G.R.F. Send Private Message Find Member's Posts Visit Member's Homepage Really should get out more Joined: 10 Aug 08 Location: United Kingdom Online Status: Offline Posts: 4028	Post Options Post Reply Quote G.R.F. Report Post Quote Reply Posted: 04 Mar 12 at 8:05pm
	I would use the term 'disturbed wind' and talk about the five times the height in front of say buildings and ten times the eight behind a given object. You can also talk about refraction effect when wind crosses the coast and tries to travel at right angles. Then you could go on about wind bends this often causes as the coast bends in a bay, then there are temperature differentials and the gusty effect of cold downdrafts and the likely reaction the wind takes to lift on starboard after a rainstorm, the reason the wind moves round with the sun, the effect of low clouds bringing stronger wind, there's loads to talk about with wind effect on sailing.
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Strangler Send Private Message Find Member's Posts Posting king Joined: 24 Mar 06 Location: United Kingdom Online Status: Offline Posts: 154	Post Options Post Reply Quote Strangler Report Post Quote Reply Posted: 04 Mar 12 at 8:17pm
	Thanks Grf but just keeping to the rig effects and fleet effects will be plenty enough.

G.R.F. Send Private Message Find Member's Posts Visit Member's Homepage Really should get out more Joined: 10 Aug 08 Location: United Kingdom Online Status: Offline Posts: 4028	Post Options Post Reply Quote G.R.F. Report Post Quote Reply Posted: 04 Mar 12 at 9:54pm
	Do you understand how and why the lee bow (wind) effects boats and particularly off the start line? Then there's disturbed air by covering the entry of an opponents sail and using disturbed (by tip vortices) off the leech, directed into your opponents entry sail entry. (One of our dirty tricks was a little extra pumping to muddy up the wind below us)
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Strangler Send Private Message Find Member's Posts Posting king Joined: 24 Mar 06 Location: United Kingdom Online Status: Offline Posts: 154	Post Options Post Reply Quote Strangler Report Post Quote Reply Posted: 04 Mar 12 at 10:30pm
	Yes. I reckon the secret to explaining it is to use very accurate diagrams [thanks Mr Gentry and Mr Twiname].

andymck Send Private Message Find Member's Posts Far too distracted from work Joined: 15 Dec 06 Location: Stamford Online Status: Offline Posts: 397	Post Options Post Reply Quote andymck Report Post Quote Reply Posted: 04 Mar 12 at 11:58pm
	Dont forget the extra pump as you cross someone just to make it worse. I only ever do it to one person, as he quite blatantly showed me how. Andy
	Andy Mck