Forums > Windsurfing   Gps and Speed talk

water depth rule

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Created by jp747 > 9 months ago, 1 Sep 2008
AUS4
NSW, 1255 posts
4 Sep 2008 10:32AM
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Funny how the guy trimming the mainsail never looks at the sail, there seems to be 5 captains.

AUS1111
WA, 3619 posts
4 Sep 2008 9:56AM
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Ian K said...


The video conditions looked similar to what it must have been outside on the practice day before this years LOC, where mid 30s were reported by a gps-speedsurfer.





That would be Slowy, and I can vouch for that coz I was out there. It was 30 knots, open ocean and very scary, frankly.

I reckon it would be great to have a speed event somewhere rough, like Scarborough Beach - that would sort out the men from the boys (put me in the boys category). Keep a video camera on hand as there would be plenty of action!

Dr Speed
68 posts
4 Sep 2008 2:30PM
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Hydrofoils are a good example, because they kill the is-not-fair argument of the sailors. Hydrofoils have a ground effect, too, if the end of the foil is close enough to the ground. Beside that every fin can use the ground as an endplate.
Every sailor or windsurfer can use the ground effect for his hull as well. No problem with more and shorter foils.
So is the ground effect of the kiters unfair ? No !

So what is then wrong with the ground effect ?

Second argument: The ground is a third element. But why may I use the shore, but not the ground ? Both are third elements which pollute the purity of sailing. Where is the difference ?

So what is wrong with the ground effect ? Nothing.


yoyo
WA, 1646 posts
4 Sep 2008 2:51PM
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Frant said ... No we will just choose a depth that frustrates our kiter friends.

On the contrary, the rule as it stands now allows ground effect for kiters but excludes it for all other craft. In 10cm of water a 20cm wide kiteboard at a 45 degree angle will have its trailing edge of the lifting surface (the WSSRC seems unaware that it is the height of the trailing edge above the ground NOT the depth of water that is the determining factor) in very close proximity to the ground. It will not touch the ground due to the entrapment of the water by the edge and fin. If there is a rise in the bottom (shallow spot)the board will rise over it on a cushion of water.

This lack of understanding is not the WSSRC fault. The Wolfson unit should have made clear to their client (the WSSRC) the relevant factors so they could have made an appropriate rule.

Tilmann said ..So what is then wrong with the ground effect

The simple answer is "the ground" . The WSSRC governs sailing records on water. Allowing a third element (the ground) to create a 100% reduction in drag is not by the WSSRC definition "sailing on water".

elmo
WA, 8725 posts
4 Sep 2008 3:00PM
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Just a thought (another lonely one)

1. Any members of the WSSR Council frequent here?
2. Anybody likely to be giving the record a bit of a nudge(or get remotley close to it) here?

No to both of the above

Slowies probably the only one even remotely close.

Then WTF are we wasting time on this pointless discussion?

Tillman, Huge respect for what you have achieved it certainly takes some size 10 titanium balls to hurtle along at those speeds, but if you have a problem with the WSSR Council not validating what you percieve as a record, then take it up with them.

If anybody has substantiated evidence that the ground effect is true then submit that evidence to them or take it through any other channels which may override the rule change.

But until then the rules are.... the rules.

Sorry, I only have 3 working brain cells in my red furry muppet shaped head and they're hurting reading this continual whining about rule changes

Dr Speed
68 posts
4 Sep 2008 3:46PM
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yoyo said...

Frant said ... Tilmann said ..[i]So what is then wrong with the ground effect

The simple answer is "the ground" . The WSSRC governs sailing records on water. Allowing a third element (the ground) to create a 100% reduction in drag is not by the WSSRC definition "sailing on water".

If the ground is wrong, the shore is wrong, too. Its the same thing. So nobody should be allowed anymore to sail close to the bank, if you take the third-element-argument serious. And that will be the death of speedsailing.

Dr Speed
68 posts
4 Sep 2008 3:52PM
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elmo said...

Just a thought (another lonely one)


Sorry, I only have 3 working brain cells in my red furry muppet shaped head and they're hurting reading this continual whining about rule changes



well, i have the same problem: In the evening I am tired and have no ideas anymore. But here in Germany we have a fresh sunny morning right now.
So sleep well there downunder !

elmo
WA, 8725 posts
4 Sep 2008 4:06PM
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Dr Speed said...

elmo said...

Just a thought (another lonely one)


Sorry, I only have 3 working brain cells in my red furry muppet shaped head and they're hurting reading this continual whining about rule changes



well, i have the same problem: In the evening I am tired and have no ideas anymore. But here in Germany we have a fresh sunny morning right now.
So sleep well there downunder !




and we have the start of our first seabreezes blowing outside my house, so once I finish of my work I'm going for a sail

yoyo
WA, 1646 posts
4 Sep 2008 4:07PM
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It's 3pm an the seabreeze is kicking in.. I'm going sailing.

hardie
WA, 4082 posts
4 Sep 2008 4:41PM
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I'm gonna punish the seabreeze for taking so long to get here, and will teach it a lesson by not sailing today

Ian K
WA, 4048 posts
4 Sep 2008 7:29PM
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Dr Speed said...

yoyo said...

Frant said ... Tilmann said ..[i]So what is then wrong with the ground effect

The simple answer is "the ground" . The WSSRC governs sailing records on water. Allowing a third element (the ground) to create a 100% reduction in drag is not by the WSSRC definition "sailing on water".

If the ground is wrong, the shore is wrong, too. Its the same thing. So nobody should be allowed anymore to sail close to the bank, if you take the third-element-argument serious. And that will be the death of speedsailing.




Good point Dr Speed. But Speed sailing is not dead, there is one place on the planet where water and wind come close to equilibrium without the influence of land. Between 55 and 65 south the prevailing westerlies circulate unimpeded.

The WSSRC should issue an especially big gong for the fastest craft between these latitudes. Like the old America's cup ruling, you'd have to sail from your home port race ready.

elmo
WA, 8725 posts
4 Sep 2008 8:21PM
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Yeeeeehhhhhhhaaaaarrrrrrgggggghhhhhhhhhh

First seabreeze



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"water depth rule" started by jp747