Active Topics |  Search

Login or Register
All Forums >  General Discussion >  Shooting the breeze... >  Sailing straight up wind ?
Author  

Macroscien

QLD
Australia

728 Posts
Posted 03/02/2012, 1:24 pm        Report  Show Profile  Reply with Quote
It is possible to design watercraft that will travel exactly where wind come from.

Using wind turbine with horizontal or vertical axis that power propeller in the water that boat should be able to have net resultant force propelling craft straight up the wind.

I wonder if is even theoretically possible to design such a sails configuration that do this same ?

I can imagine the closest to ideal could be configuration of two kites flying 8 figure always on opposite wind direction with resultant vector straigh forward...

Can't do this same with sails I am affraid



But if future Americas Cup allow all tricks the question is if such a boat will be eventually quicker on the race ? ( travelling straight up the wind ? )

If kites are still not allowed on Americas Cup ( why not ? ) the small guile with sort of pair flying spinakers shoud do the trick ...

kiteboy dave


QLD
Australia

885 Posts
Posted 03/02/2012, 4:21 pm        Report  Show Profile  Reply with Quote
Good question! Kinda linked to the 'downwind faster than the wind' experiment they did a year or two ago. The answer was yes, you can clearly go straight downwind, powered only by the wind, much faster than the wind.

stamp

NSW
Australia

1795 Posts
Posted 04/02/2012, 7:00 am        Report  Show Profile  Reply with Quote
the c class cats they use (or used to) for the little americas cup series have a solid wing sail. they go almost directly upwind at speed. it's not dead upwind but damn close.

Gizmo


SA
Australia

1725 Posts
Posted 04/02/2012, 7:22 am        Report  Show Profile  Reply with Quote
stamp said...

the c class cats they use (or used to) for the little americas cup series have a solid wing sail. they go almost directly upwind at speed. it's not dead upwind but damn close.


Not quite.... the yachts sail about the same angles to "true wind" but due to the speed of the yacht the "apparent wind" is what the yacht actually ends up sailing with.
Its the same thing with land sailing.

evlPanda


QLD
Australia

4249 Posts
Posted 04/02/2012, 6:46 pm        Report  Show Profile  Reply with Quote
kiteboy dave said...

Good question! Kinda linked to the 'downwind faster than the wind' experiment they did a year or two ago. The answer was yes, you can clearly go straight downwind, powered only by the wind, much faster than the wind.


His next challenge actually is sailing dead upwind, faster than the wind.

Macroscien


QLD
Australia

728 Posts
Posted 04/02/2012, 7:00 pm        Report  Show Profile  Reply with Quote
evlPanda said...

kiteboy dave said...

Good question! Kinda linked to the 'downwind faster than the wind' experiment they did a year or two ago. The answer was yes, you can clearly go straight downwind, powered only by the wind, much faster than the wind.


His next challenge actually is sailing dead upwind, faster than the wind.


Eeee, the real challenge will be sail up wind when is no wind at all
and very pragmatic too
(you just pump ones or two start moving then you have relative wind and use it and speed up !!! - no that is serious topic but free energu for somebody else, may exploit it ie peter33? )

Mark _australia


WA
Australia

7981 Posts
Posted 04/02/2012, 7:25 pm        Report  Show Profile  Reply with Quote
Dunno what all the fuss is about.
I can sail dead upwind on wave gear. Only for about 2 metres though........
Featured Photo

Uploaded by: Haircut
(View more)

Macroscien


QLD
Australia

728 Posts
Posted 04/02/2012, 7:34 pm        Report  Show Profile  Reply with Quote
Mark _australia said...

Dunno what all the fuss is about.
I can sail dead upwind on wave gear. Only for about 2 metres though........


Have been thinking just about sailing down the rapid river
not sure how sail may help then - maybe get the balance ??
   
All Forums >  General Discussion >  Shooting the breeze... >  Sailing straight up wind ?
Trade your gear in the Buy & Sell


^^ Return to top of page ^^



Kitesurfing
Windsurfing		 Stand Up Paddle
Surfing		 Winner of Australia's Most Popular Water Sports Website Award for 2010 Power Boats
Sailing		 Fishing
Diving
Terms Of Use   |  Privacy Policy   |  Help   |  Contact   |  Advertise With Us   |  Twitter   |  Facebook   |  Weather On Your Site   |  Mobile Weather Site

© Copyright 1997-2012, WeatherWise Pty Ltd ATF Seabreeze Technologies Trust.