Faster than the wind

[b43xoit]

If you can get 2x the wind speed in water, what could you do on ice with the same sails?

[pataxe96]

that doesnt look like six knots!

[LukeLynch123]

@pataxe96 Patty you weirdo

[MrHobiecat]

TWICE the windspeed? Post a link to the polar graph for the SK4, cause Im waving the BS flag on this on.

To get up to 2x windspeed you would need a hydrofoil, or an ICE BOAT.

[0lllliiiiiii]

its a gennaker.

a spinnaker would have his pole on front side of the mast,

whereas the gennaker has a bowsprit

[WSVH2O]

@0lllliiiiiii it is a spinnaker it is a asymetric spinnaker not gennaker. gennaker is on front of boat not on bowsprit.

[StuffThatBurns]

@0lllliiiiiii an asymetric spinnaker is often on a bow sprit. A symetric spinnaker is on a pole

[maxendenia]

the gybe was not really good....

[Hedgehoggy1983]

Is that a gennaker?

[biondo81]

@Hedgehoggy1983 look like a spi

[eyytee]

An animation that explains how it works:

watch?v=H_OKNr120t4

[kpoida]

same reason a surfer will go faster than the wave...

[kpoida]

i should also add twice of nothing is nothing lol

[bryce65]

@kpoida, err... no its not, were dealing with apparent wind here, not propulsion.

[shortattentionspan1]

human intelligence at work and having a lot of at the same time - pure joy!!!

[edshift]

Also vital to this is the boat is very lightweight and has enough sail area ratio to all up weight as to be able to be planing in this light a wind so drag is vastly reduced in comparison to displacement speeds as would normally be achieved even in a "normal" high performance dinghy like a 505.

If anyone is really interested in the whole "faster than the wind" mechanics and history read High Performance Sailing by Bethwaite. Pretty hard going in places but The Best Book on this ever written.

[Camerameister]

I have that book and you are absolutely correct.

[pleb222]

there are two parts to the answer. First, the boat is traversing the wind, creating an apparent wind, which is faster then the real wind. Also, wind speed is not directly related to the power of the sails. The sails create a gap in pressure on the far side of the sails, like an airplane wind, it gives lift. The sails are pulled by the wind, not pushed by it.

[No1118117]

Apparent wind only comes into effect on a reach, right?

[bryce65]

@No1118117, not necessarily. It all depends on wind strength on really what type of boat your sailing to produce that amount of apparent wind.

[Gazlra]

.... ma8... thats not moth sails... thats any sails!!!

[cherub2972]

the sails are probably like a moths, where they build up heaps and heaps of apparent wind, which means there creating there own wind, i had to think about it for a while too. lol

[naguto]

how is it possible to go twice the windspeed? unless they have some sort of engine, i dont see how that's possible. it would be possible if they had a self sustaining engine that's powered by the headwind created by their forward motion.

[tommyeflight89]

... ):

[defleppard10294]

they create there own wind (apparent wind)

[jimboq8]

You are cutting across the wind your not going with it...

[dumon13]

naguto

tris like groupama can do like

wind of 15 knots the boat goes 27 knots

it is possible and is called apparent wind

[Lozzie74]

@jimboq8 I really don't see why that bothers you. They never said they were OUTRUNNING the wind. Their speed is twice the wind speed - that's all they said. Then again, reading your reply your confusion is understandable. Did you notice how you typed "YOU ARE cutting...". The contraction of this is "YOU'RE". The word "YOUR" is for ownership. Therefore, your closing comment should have been "...YOU'RE not going with it". Seriously, get the language right.

[TEHGROUND]

@jimboq8 So?

Downwind isn't the fastest you can go on a boat.

Perpendicular/beam reach is the fastest.

[SpecialTBK]

Who designs these? they're like a B14 in wing design and hull shaped like one also except it is narrow like an international 14. I sail a 49er, that thing looks like fun too!

[SPARTTAIN117]

they r a sk4

I reckon it looks like fun aswell