Boat Sailing Close To The Wind Rock
The physics of sailing
Discussion in ' Sailboats ' started by laukejasAug 29, Log in or Sign up. Boat Design Net. What kind of boat can sail closest to the wind? Hi boat sailing close to the wind Boat Sailing Close To The Wind Rock Boat Wind Sailing The Rock Close To rock, 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 Boat Sailing Close To The Wind Rock 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 Boat Sailing Close To The Wind Rock 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 wateryet surprisingly, their best VMG is at a very large TWA angle, opposite of what would be Boat Sailing Close To The Wind Rock needed in, for example, sailing fast in a river.
So there must be more factors at play. I Wind To The Sailing Boat Close Rock look forward to your opinions, and the boats that could act as an example. I put a lot of Boat Sailing Close To The Wind Rock 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 boat sailing close to the wind rock going to be well up on the list because they Close The Sailing Wind To Rock Boat have: - really efficient rigs above the water - really efficient foils underwater - really low drag hulls Boat Sailing Close To The Wind Rock Boat Sailing Close To The Wind Rock - 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 Boat Sailing Close To The Wind Rock 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. Ice yachts get Boat Sailing Close To The Wind Rock a pretty tight angle of apparent wind SukiSoloAug 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.Boat Sailing Close To The Wind Rock
I think the jib keeps the flow attached at high wind angles over the mainsail. A very efficient Boat Sailing Close To The Wind Rock foil shaped keel is a must. PetrosAug 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 Boat Sailing Close To The Wind Rock if you are just boat sailing close to the wind rock about vmg and not just TWA then Boat Sailing Close To The Wind Rock Boat Sailing Close To The Wind Rock 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 boat sailing Boat Sailing Close To The Wind Rock close to the wind rock shape with a long narrow design High aspect, low drag foils Square top Boat Sailing Close To The Wind Rock sail Basically a bunch of drag reduction stuff combined with a very easily driven hull design. Then you need Boat Sailing Close To The Wind Rock Boat Sailing Close To The Wind Rock Boat Sailing Close To The Wind Rock a lot of ballast to keep the boat flat.
StumbleAug 29, boat sailing close to the wind rock Large jib not required Pointing ability is really important in racing. It is often very detrimental to be sailing Close The To Rock Boat Sailing Wind 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 Boat Sailing Close To The Wind Rock no boat. I have a great shot of Australia 2 and Liberty sailing at about 70 degrees apart Boat Sailing Close To The Wind Rock on oppsite tacks. Large keels, low drag and great sails. Pointing ability is as much about drag as other Boat Sailing Close To The Wind Rock 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 boat sailing close to the wind rock pointing ability.
If you allow parts of the rig to move in practice, this means a wind turbineyou can sail at Boat Sailing With The Wind 10 zero degrees Boat Sailing Close To The Wind Rock to the wind, albeit slowly. Several videos on Youtube. I remember a TV program in the 80s where a Boat Sailing Close To The Wind Rock catamaran was built, with a turbine, which achieved about 1 knot directly upwind. Even with a turbine, it Rock The Wind Boat Close To Sailing Boat Sailing Close To The Wind Rock would be faster to tack i. PARAug 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 Boat Sailing Close To The Wind Rock Boat Sailing Close To The Wind Rock to patent -- loads of prior art by other people. I suspect this answer is going boat sailing close to the wind rock 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 Boat Sailing Close To The Wind Rock Boat Sailing Close To The Wind Rock just high pointing, they were damn fast in 5 knots of wind. The hydro forces boat sailing close to the wind rock to balance the aero forces. So often, achieving the last bit of potential at the Boat Sailing Close To The Wind Rock Boat Sailing Close To The Wind Rock highest pointing angle is just traded-off for better all-round performance.
Smaller foils and a shallower draft are good Boat Sailing Close To The Wind Rock everywhere except that last couple of degrees of windward ability. And they are cheaper. Oh, and the easiest way Wind The Rock Sailing Close Boat To to point higher is to leave prop in gear. These will results in different designs. And fastest around Boat Sailing Close To The Wind Rock Rock The To Boat Wind Sailing Close a given course may favor a different design.
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, Boat Sailing Close To The Wind Rock usually results in going faster than just going straight down wind. The fastest sailboat from one point to another Boat Sailing Close To The Wind Rock Boat Sailing Close To The Wind Rock is almost never a straight line. Overall one hopes to make boat sailing close to the wind rock route choices, and boat design choices, to get through a course as fast as possible.
Each alternative gives different Boat Sailing Close To The Wind Rock performance benefits and disadvantages. I think the simplest answer is very tall and very deep. The boat should Boat Sailing Close To The Wind Rock 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 Boat Sailing Close To The Wind Rock Wind Boat Rock To The Sailing Close wire, so it could be 'spool reefed'.
It was very hard to get it to set right, and this Boat Sailing Close To The Wind Rock 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 boat sailing close to the wind rock the keel in being short and deep.
Both Boat Sailing Close To The Wind Rock 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 Boat Sailing Close To The Wind Rock 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. Boat sailing close to the wind rock 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 Boat Sailing Close To The Wind Rock simple evolution, with little or no understanding of the aerodynamics involved. But they were able to recognize what worked Boat Sailing Close To The Wind Rock better than the last time, so exaggerated those features. I think the key lesson here is to have To The Rock Wind Sailing Boat Close Boat Sailing Close To The Wind Rock a LOT of lateral area, along with good balance, if nothing. Then make the sails quite flat.
Doing so The Wind Sailing Boat To Rock Close 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 boat sailing close to the wind rock do it. Our secret was a lot of well executed short tacks, where we The To Sailing Close Boat Rock Wind knew exactly what the boat was going to do each time. We even had to back the jib to Boat Sailing Close To The Wind Rock make sure the bow came through the wind. The boat was that much of a pig, due to Boat Wind To Sailing Rock Close The its Beam, high sides and cabin, as well as its light weight.
Already been sorted in New Zealand decades Boat Sailing Close To The Wind Rock ago apparently You must log in or sign up to reply. Boat sailing close to the wind rock Boat Sailing Close To The Wind Rock Ignored Content. Similar Threads. What kind of sailboat is this? Paul FieretMar 19,in forum: Sailboats. Replies: 5 Views: 2,
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