From: bert on 1 Aug 2010 15:45 On Aug 1, 9:51 am, Hayek <haye...(a)nospam.xs4all.nl> wrote: > Tom Roberts wrote: > > Y.Porat wrote: > >> about "sailing agisnst the wind' > >> it is an illusion!!! > > > You know as little about sailing as you do about physics or math -- i.e.. > > NOTHING AT ALL. > > > There is no "illusion" about sailing upwind, and sailors do it all the > > time. Not directly upwind, mind you, but a good boat and crew can > > approach 45 degrees from directly upwind. Using alternate tacks the boat > > can have a long-term path going directly upwind. > > > BTW a modern sailboat on a reach can sail considerably faster than the > > wind. But no boat can do so when running before the wind. > > Are you sure ? Sometimes you can go faster by slightly > downward tacking. Especially if you follow wind shifts, > also a supreme tactic when going upwind. > > I remember they laughed at my compass. When I beat them > for the first time, they all ran at the shop and > installed one too. (Laser class) > > Uwe Hayek. > > > > > If you don't know what these terms mean, look them up. They are > > standard sailing terms. > > > Tom Roberts > > -- > We are fast approaching the stage of the ultimate > inversion : the stage where the government is free to do > anything it pleases, while the citizens may act only by > permission; which is the stage of the darkest periods of > human history. -- Ayn Rand > > I predict future happiness for Americans if they can > prevent the government from wasting the labors of the > people under the pretense of taking care of them. -- > Thomas Jefferson. > > Socialism is a philosophy of failure, the creed of > ignorance, and the gospel of envy, its inherent virtue > is the equal sharing of misery. -- Winston Churchill. Go to Boston harbor visit Old Ironsides go below its deck and there you will see how the crew could turn the mast so it would have the propper angle to tack. Yes a power boat can go directly into the wind(straight line) A sail boat has to zig zag.and that makes getting from A to B a greater distance. However that 16 year old girl knew to go round the world she had to sail. Sailing is green. Someday those 1500 foot oil tankers carrying 10 million gl. of oil will also have a sail What's their hurry. TreBert
From: Autymn D. C. on 2 Aug 2010 03:57 On Aug 1, 4:59 am, "Y.Porat" <y.y.po...(a)gmail.com> wrote: > about "sailing agisnst thewind' > it is an illusion!!! > as usual mathematicians are discussing > 'paper discussions '' > on issues tha they never experienced There are no illusions, but delusions. > 2 > in addition to that > the boat is moving in a zig zag line > against the wind switchback
From: Autymn D. C. on 2 Aug 2010 03:58 On Aug 1, 5:16 am, Tom Roberts <tjroberts...(a)sbcglobal.net> wrote: > BTW a modern sailboat on a reach can sail considerably faster than thewind. But > no boat can do so when running before thewind. The wind is free, not fast. The statement is absurd.
From: bert on 3 Aug 2010 17:23 On Aug 2, 3:58 am, "Autymn D. C." <lysde...(a)sbcglobal.net> wrote: > On Aug 1, 5:16 am, Tom Roberts <tjroberts...(a)sbcglobal.net> wrote: > > > BTW a modern sailboat on a reach can sail considerably faster than thewind. But > > no boat can do so when running before thewind. > > The wind is free, not fast. The statement is absurd. It fits that the Egyptians use the river Nile about 4,000 BC used "square sails"which could sail only before the wind. The triangular sail,which is able to sail into the wind first appeared about AD 300. Partial vacuum of a triangular sail took a long time coming TreBert
From: George Hammond on 7 Aug 2010 02:04 On Sun, 01 Aug 2010 07:16:53 -0500, Tom Roberts <tjroberts137(a)sbcglobal.net> wrote: >Y.Porat wrote: >> about "sailing agisnst the wind' >> it is an illusion!!! > >You know as little about sailing as you do about physics or math -- i.e. NOTHING >AT ALL. > >There is no "illusion" about sailing upwind, and sailors do it all the time. Not >directly upwind, mind you, but a good boat and crew can approach 45 degrees from >directly upwind. Using alternate tacks the boat can have a long-term path going >directly upwind. > >BTW a modern sailboat on a reach can sail considerably faster than the wind. But >no boat can do so when running before the wind. > > If you don't know what these terms mean, look them up. They are > standard sailing terms. > > >Tom Roberts > > [Hammond] A cambered airplane wing can achieve a maximum lift coefficent of nearly 2.0 Anybody know what the maximum lift coefficient of an ordinary triangular sloop mainsail might be? ======================================== GEORGE HAMMOND'S PROOF OF GOD WEBSITE Primary site http://webspace.webring.com/people/eg/george_hammond Mirror site http://proof-of-god.freewebsitehosting.com HAMMOND FOLK SONG by Casey Bennetto http://interrobang.jwgh.org/songs/hammond.mp3 =======================================
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