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Points of Sail and Directions of Sail Trim | Discover Boating
Sailing up wind will be a lot Boat Sailing Close To The Wind Full easier if you steer with a rudder, and to this end the techniques described in this article are most suited to those sailing with a rudder, although those who steer with a paddle might also find something of interest in the article. First get the boat moving. Steering a sailing canoe is much like steering a car - the steering controls will only work if the canoe is moving. The first step is to get the boat moving forward while side on to the wind. The triangle in the first illustration (Fig.1) shows the wind direction, which in this case Boat Sailing Close To The Wind Guitar is blowing on to the side. Sailing close to the wind means that you are almost sailing directly into the wind. This is not possible as the wind would hit both sides of your sail which would begin to luff. The force of the wind hitting you directly would eventually start to push your boat backward and you'd be in something called "irons". To avoid this nasty situation one sails close to the wind but not directly into it. I'm not sure of the number of degrees you could get away with - maybe % so the wind only hits your sail on one side. This is also known as a tack. To sail very close to the wind. Find sailing with the wind stock images in HD and millions of other royalty-free stock photos, illustrations and vectors in the Shutterstock collection. Thousands of new, high-quality pictures added every day.

Discussion in ' Sailboats ' started by laukejas , Aug 29, Log in or Sign up. Boat Design Net. What kind of boat can sail closest to the wind? Hi guys, After this season of sailing, when I had to beat upwind through extremely narrow lake passages, my boat struggling through degrees on each tack, I got curious. Mine does 50 degrees at it's best. The curious thing is that multihulls have a very large TWA, but wonderful VMG, because their insane speed makes up for that large angle.

However, in some cases, it is more important to be able to have a boat that reaches it's best VMG when sailing very closely to the wind, that is, at low TWA. For example, when sailing or even racing in narrow passages, docking, maneuvering in tight spaces, or many other cases. So I wonder, what kind of sailboat can sail closest to the wind? Is there a record? I also wonder what kind of hull and rig would be best for sailing so close to the wind. Near-flat, high-aspect rig and a slender hull with a very effective, low-drag board to negate drift seems logical.

But then again, catamarans have all these features if you neglect the windward hull that's lifted out of the water , yet surprisingly, their best VMG is at a very large TWA angle, opposite of what would be needed in, for example, sailing fast in a river. So there must be more factors at play here. I look forward to your opinions, and the boats that could act as an example.

I put a lot of effort into searching any information and discussions on this very specific topic, but found little yet Time to fill the gap. Perhaps counter intuitively, to point really high you must also go rather slowly, otherwise the apparent wind comes back too far. That's why the really fast boats have quite a wide angle. The IACC ones are going to be well up on the list because they have: - really efficient rigs above the water - really efficient foils underwater - really low drag hulls - so much lead that they cannot actually sail very fast upwind for their size.

The thing is though, if you are in a very high performance boat that gets its best vmg at quite a wide angle, then you do have the option of slowing it down and pointing at the moon. Its rather handy if you have narrowly misjudged the approach to a racing mark and need to sneak around. Ice yachts get a pretty tight angle of apparent wind SukiSolo , Aug 29, IT seems to me that a single large sails, a cat rig, would be most efficient, but it is necessary to have a jib to get the angle.

I think the jib keeps the flow attached at high wind Boat Sailing Close To The Wind Zip angles over the mainsail. A very efficient foil shaped keel is a must too. Petros , Aug 29, As mentioned in order to sail really high to the TWA you really need to slow the boat down to keep the apparent wind from shifting so far forward.

But if you are just worried about vmg and not just TWA then there are some characteristics that can be pretty easily defined. A Uni-Rig like the A-Class Catamarans or M Rotating wing mast wing masts are better but far more difficult to deal with A very efficient hull shape with a long narrow design High aspect, low drag foils Square top sail Basically a bunch of drag reduction stuff combined with a very easily driven hull design.

Then you need a lot of ballast to keep the boat flat. Stumble , Aug 29, Large jib not required Pointing ability is really important in racing. It is often very detrimental to be sailing low in large fleet. Etchell 22s have a small jib and have very low tacking angles. They have large keels, tight sheeting angles and low drag both above the water and below water.

You never want to be above an Etchell because they point so high and willwind upon your bow really quickly. Watch them on flat water. Put them in slop and light wind and they will not point high but then again no boat will. I have a great shot of Australia 2 and Liberty sailing at about 70 degrees apart on oppsite tacks. Large keels, low drag and great sails. Pointing ability is as much Boat Sailing Close To The Wind 41 about drag as other factors. If you tow a dinghy upwind or put a three bladed prop on the boat you lose height.

This is because drag feeds straight into pointing ability. If you allow parts of the rig to move in practice, this means a wind turbine , you can sail at zero degrees to the wind, albeit slowly. Several videos on Youtube. I remember a TV program in the 80s where a catamaran was built, with a turbine, which achieved about 1 knot directly upwind. Even with a turbine, it would be faster to tack i. PAR , Aug 29, No, what I mean is that the boat itself is at zero incidence i.

The turbine is used to drive a propeller, either mechanically or maybe electrically. No need to patent -- loads of prior art by other people. I suspect this answer is going to bug a lot of people, but all else being equal, the boat with the lower total drag angle sum of aero drag angle and hydro-drag angle will have the potential to sail faster and have its VMG at a higher angle, not lower.

The old 12 meter AC boats weren't just high pointing, they were damn fast in 5 knots of wind. The hydro forces have to balance the aero forces. So often, achieving the last bit of potential at the highest pointing angle is just traded-off for better all-round performance.

Smaller foils and a shallower draft are good everywhere except that last couple of degrees of windward ability. And they are cheaper, too. Oh, and the easiest way to point higher is to leave prop in gear. These will results in different designs. And fastest around a given course may favor a different design again.

For example, the highest pointing boat may not be the fastest one up wind. I know that usually sailing down wind at an angle, and jibing back and forth, usually results in going faster than just going straight down wind. The fastest sailboat from one point to another is almost never a straight line. Overall one hopes to make both route choices, and boat design choices, to get through a course as fast as possible.

Each alternative gives different performance benefits and disadvantages. I think the simplest answer is very tall and very deep.

The boat should have a tall Bermuda Main and maybe no jib at all. I noticed my Siren 17 pointed higher without the jib than with it. But it had a crappy jib that was supposed fly on its own wire, so it could be 'spool reefed'. It was very hard to get it to set right, and this usually meant sailing a few more degrees off the wind. When I say deep, I mean it needs a very deep, short keel, probably with a bulb on it, which contains all or most of the ballast.

The rudder should resemble the keel in being short and deep too. Both should have proper foil sections. Because the boat will be moving slower upwind, the keel needs to larger than usual in total area. And this usually means making it even deeper, to get that extra area. The hull would be heavy, at least for its Beam, so it has the momentum to smash through a chop, or maintain way, if the wind heads up for a short while.

The 19th century way of doing it was to have a massive long keel, that was much deeper than usual, have deep "V" like section in the Hull, have very low free board, and have a very large main sail. Those boats were built long before the airplane was invented, so their characteristics came about by simple evolution, with little or no understanding of the aerodynamics involved.

But they were able to recognize what worked better than the last time, so exaggerated those features. I think the key lesson here is to have a LOT of lateral area, along with good balance, if nothing else. Then make the sails quite flat. Doing so may rob them of power, but will give them lift at a tighter angle to the wind. But really. All this trouble just gets you ever diminishing returns, while compromising the usefulness of your boat in other points of sail.

I once sailed my Siren 17 up a 40 ft wide channel, dead upwind, even with its crappy jib. People came out of their cottages to watch me and my good friend do it. Our secret was a lot of well executed short tacks, where we knew exactly what the boat was going to do each time. We even had to back the jib to make sure the bow came through the wind.

The boat was that much of a pig, due to its Beam, high sides and cabin, as well as its light weight. Already been sorted in New Zealand decades ago apparently You must log in or sign up to reply here. Show Ignored Content. Similar Threads. What kind of sailboat is this? Paul Fieret , Mar 19, , in forum: Sailboats. Replies: 5 Views: 2,

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