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Top end limit finally reached.. |
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Daniel Holman
Really should get out more Joined: 17 Nov 08 Online Status: Offline Posts: 997 |
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Topic: Top end limit finally reached.. Posted: 25 Jun 12 at 12:23pm |
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I reckon approx 2% of club sailors - and even then those in more heavy air friendly craft - could get round the course in a true 30kts.
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G.R.F.
Really should get out more Joined: 10 Aug 08 Location: United Kingdom Online Status: Offline Posts: 4028 |
Post Options Quote Reply Posted: 25 Jun 12 at 12:25pm | |
That isn't 30 + knots, no whitecaps downwind, that water state? 25 if that..
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Post Options Quote Reply Posted: 25 Jun 12 at 12:51pm | |
2.5 hour race starting from 12 with the wind trace given at the start of the video. Average is always between 25-30 with gust up to 35 knots. It's in the harbour though, so relatively flat. Although the chop is often more difficult than proper waves.
Edited by mozzy - 25 Jun 12 at 12:55pm |
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ellistine
Really should get out more Joined: 06 Mar 08 Online Status: Offline Posts: 762 |
Post Options Quote Reply Posted: 25 Jun 12 at 1:23pm | |
Something I noticed during the last Sail for Gold, the Portland Harbour anemometers were reading nearly 30knots yet the on the water commentators where reporting 16knots on their handhelds. As somebody who basis whether to sail or not on what the wall says, I wouldn't be surprised if I've ever sailed in much more than 20knots.
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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: 25 Jun 12 at 1:37pm | |
Wind shear. Handhelds will be too low to be very reliable. Its wind speed ten to 15 feet up that really counts. |
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RS400atC
Really should get out more Joined: 04 Dec 08 Online Status: Offline Posts: 3011 |
Post Options Quote Reply Posted: 25 Jun 12 at 1:45pm | |
Windspeed is normally standardised at 10 metre height. For weather people anyway. At the sea surface it will be a fraction of that. What happens at the height of a dinghy rig will vary according to how turbulent the air is. So 16 knots at deck level could easily be 30knots at 10 metres. |
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Contender443
Really should get out more Joined: 01 Oct 04 Location: United Kingdom Online Status: Offline Posts: 1211 |
Post Options Quote Reply Posted: 25 Jun 12 at 1:48pm | |
Mind you most ROs on a committee boat will be measuring the wind strength at about that height. They may also be using a yachts mast head anenometer.
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Bonnie Lass Contender 1764
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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: 25 Jun 12 at 1:59pm | |
A common one we use in offshore calcs is the little ^ means to the power of, so 30knots at 10m would be equate to approximately 26.6kn at 3m and 23.8kn at 1m where a rib driver may be sat.
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Musto Skiff and Solo sailor
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Daniel Holman
Really should get out more Joined: 17 Nov 08 Online Status: Offline Posts: 997 |
Post Options Quote Reply Posted: 25 Jun 12 at 2:11pm | |
The anemometers at Weymouth tend to overread a fair bit, as do the bramble/chi/camber/sotonmet ones to a lesser extent.
I think that what we dinghy sailors refer to as x kts is the wind speed at yacht mast height. Of course the handheld at an angle to the wind next to the rib console behind the fat bloke will read a fair bit less. |
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Contender443
Really should get out more Joined: 01 Oct 04 Location: United Kingdom Online Status: Offline Posts: 1211 |
Post Options Quote Reply Posted: 25 Jun 12 at 2:13pm | |
So it seems it is another case of forum wind.
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Bonnie Lass Contender 1764
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