America's Cup

[oldrider]

Agreed, lets hope that Spithill doesn't want to become known as sailing's Michael Schumacher...

Best not to overlook that Spithill "is" ... Australian! ... nough said!

[paturoa]

Can someone explain the difference between jybing and tacking? Are they required to do so many of each on each leg or are these simply positional manouvers?

When the boat is heading into the wind, a turn through the direction of the wind it is called a tack. When the wind is coming from behind the boat it is called a gybe.

The complication with cats like these (compared to conventional yachts) is that when traveling / going in the same direction as the wind, the wind is still coming from the front of the boat. Spooky!

Conventional yachts would have the wind coming from the rear and would use sails like spinnakers and are essentially limited to no faster than the wind when going down hill.

[george formby]

When the boat is heading into the wind, a turn through the direction of the wind it is called a tack. When the wind is coming from behind the boat it is called a gybe.

The complication with cats like these (compared to conventional yachts) is that when traveling / going in the same direction as the wind, the wind is still coming from the front of the boat. Spooky!

Conventional yachts would have the wind coming from the rear and would use sails like spinnakers and are essentially limited to no faster than the wind when going down hill.

Learn something new everyday. Cheers.

The bold bit is how the Tri feels, getting your head blown off with the wind behind you

[Mo NZ]

Yeah cheers.

Just don't ask me how they can do 40kts in 20kts of wind. I have read it, seen it, and still trying to get my head around it.

[MisterD]

Just don't ask me how they can do 40kts in 20kts of wind. I have read it, seen it, and still trying to get my head around it.

You need to stop thinking of the sail as something that pushes the boat along - even with flappy sails, they work like wings, creating a pressure difference on either side due to the air flow over them. The sail gives a force one way, the water won't let the boat move sideways so the result is that it's "squeezed" forwards.

Sailors will tell you that fast boats "make their own wind"...

[Ocean1]

A jibe or gybe is a sailing maneuver whereby a sailing vessel reaching downwind turns its stern through the wind, such that the wind direction changes from one side of the boat to the other. For square-rigged ships, this maneuver is called wearing ship.

In this maneuver, the mainsail will cross the center of the boat while the jib is pulled to the other side of the boat. If the spinnaker is up, the pole will have to be manually moved to the other side, to remain opposite the mainsail. In a dinghy, raising the centerboard can reduce the risk of capsizing during what can be a somewhat violent maneuver.

The other way to change the side of the boat that faces the wind is turning the bow of the boat into, and then through, the direction of the wind. This operation is known as tacking or coming about.

How many you do is up to you but usually only done to the minimum to reach the weigh point required.

Not quite. Wearing ship is what a square rigger did in heavy weather or when short handed. When head to wind instead of tacking you'd bear away until the wind was aft, keep going through some 300 degrees until head to wind again on the opposite tack. Easier to do and kinder on the rig but it costs a lot in terms of windward progress.

[Ocean1]

Learn something new everyday. Cheers.

The bold bit is how the Tri feels, getting your head blown off with the wind behind you

Yes, the apparent wind on multis can be a long, long way fwd of the actual wind.

[Edbear]

You need to stop thinking of the sail as something that pushes the boat along - even with flappy sails, they work like wings, creating a pressure difference on either side due to the air flow over them. The sail gives a force one way, the water won't let the boat move sideways so the result is that it's "squeezed" forwards.

Sailors will tell you that fast boats "make their own wind"...

Bit like some fast riders on KB...

[george formby]

Not quite. Wearing ship is what a square rigger did in heavy weather or when short handed. When head to wind instead of tacking you'd bear away until the wind was aft, keep going through some 300 degrees until head to wind again on the opposite tack. Easier to do and kinder on the rig but it costs a lot in terms of windward progress.

Thank you Horatio. I've learned more about sailing in this thread than all my trips on the water combined.

[Brian d marge]

When the boat is heading into the wind, a turn through the direction of the wind it is called a tack. When the wind is coming from behind the boat it is called a gybe.

The complication with cats like these (compared to conventional yachts) is that when traveling / going in the same direction as the wind, the wind is still coming from the front of the boat. Spooky!

Conventional yachts would have the wind coming from the rear and would use sails like spinnakers and are essentially limited to no faster than the wind when going down hill.

ok kow does that work

if boat going in same direction how does wind come from front of boat ...

Stephen

[george formby]

Might as well give my mate a plug seeing as I'm rabbiting on about it. At about 3:15 he is sailing straight with the wind. Very cool way to go when the sun is shining. No sensation of wind at all

Te Kaihau

Not bad for a homemade boat, eh?

[Ocean1]

Thank you Horatio. I've learned more about sailing in this thread than all my trips on the water combined.

Not 300 degrees in fact, closer to 240. Most of the old dears couldn’t lie closer than 6 points, (66deg) if they got caught with a coast to leeward in a blow they were often fukt.

Which leads nicely to "club hauling".

[Ocean1]

ok kow does that work

if boat going in same direction how does wind come from front of boat ...

Stephen

Ignoring friction and a shitload of other factors... if the boat's going exactly downwind it doesn't work, but if they bear away to say 45 deg then the windspeed over the sails is much higher. High enough to increase speed by more than the increased distance. It means the wind on your boat moves forward, which means you bear away more, which means more speed.......

In the case of those cats the speed difference is enough to mean foiling... or not. Which makes the difference huge, they can get to the leeward mark in almost half the time by travelling 1 1/2 times the distance.

[Ocean1]

Might as well give my mate a plug seeing as I'm rabbiting on about it. At about 3:15 he is sailing straight with the wind. Very cool way to go when the sun is shining. No sensation of wind at all

Te Kaihau

Not bad for a homemade boat, eh?

Very nice.

Not kosher, though, really. I mean, like voltswagens and outboard motors they're un-natural, against gods will.

[george formby]

Very nice.

Not kosher, though, really. I mean, like voltswagens and outboard motors they're un-natural, against gods will.

You might have a point. He rides a Ducati. Thing is, he's made it reliable.