Notice:
The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.
He's bummed because a C25 can't point closer than THIRTY DEGREES?
His blog title says it all. Metanoia is Greek for repentance/turning around. Using a y instead of an i (metanoya instead of metanoia) would make the Greek metanoua, which I don't think is a real Greek word.
Confirms my opinion of blogs, via MacBeth: "a tale told by an idiot, full of sound and fury, signifying nothing."
That is me in my 82, I have no idea how he found it. It sits on my Cox cable server and my .mac server. The info from google says he got it from my Cox server, I did not realize it was as public as the .mac one. I hope no one searches for Frank Hopper's butt!
How often do they get 20+ knots winds anywhere from Seattle to Everett??!!! Any time I've ever seen it, all the guys with big boats are running to the dock to get some sailing in, and everybody else treats it like a storm.
You look very relaxed Frank...good job!!! I still don't understand how my Windex can read 10 to 15 off the wind and the boat is still going....not as fast as it could but still....and this guy says it can only do 30 degrees off the wind. Am I missing something? Cheers.
Dennis, the faster you go upwind, the more the apparent wind, as shown by your windex, will move forward. At a certain point you'll be pinching -- sailing too close to the wind -- and you'll have to fall off to keep the boat moving. When the wind is aft of the beam, the opposite is true -- with boat speed, the apparent wind moves aft.
High tech racers can point at about thirty degrees true (as opposed to apparent wind), but I'm ecstatic if my C25 tacks within ninety degrees (forty-five on each side). The blogger's complaint that a C25 can't sail higher than thirty degrees off the wind only reveals he has no idea what he's talking about.
>" is the any way to tell what the true wind is while under sail? Cheers."
Full-on (read expensive) boat instrumentation does that automatically. If you know 'true' boat velocity (speed/direction) and apparent wind velocity (speed/direction) you can calculate what the wind speed/direction would be if the boat were sitting still (true wind).
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by ClamBeach</i> <br />>" is the any way to tell what the true wind is while under sail? Cheers."
Full-on (read expensive) boat instrumentation does that automatically. If you know 'true' boat velocity (speed/direction) and apparent wind velocity (speed/direction) you can calculate what the wind speed/direction would be if the boat were sitting still (true wind). <hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
I knew that vector nonsense in Honors Physics would come into play eventually
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Duane Wolff</i> <br />I knew that vector nonsense in Honors Physics would come into play eventually <hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote"> Precisely! And if you really work at it, you can come up with the explanation of how a sailboat sails upwind. (...although there are some conflicting theories, and the physicist who says a curve-ball is an optical illusion probably thinks it can't be done at all.)
There is a way to do it without all the expensive bells & whistles, but requires, dare I say this, a bit of homework and research.
Simple vector: going DEAD downwind, sailing (or motoring) 4 knots, (apparent) wind gage says 8 knots, true wind speed is 12 knots in a direction dead aft. Simple math. Same thing going upwind: boat speed is 4 knots, apparent wind speed is 12 knots, true wind speed is 8 knots dead ahead.
Now all you need to do, for a small range of boat speeds (i.e., 2, 4, 6 knots) is to prepare vector charts for the three or four other points of sail (i.e., close hauled, close reach, beam reach, broad reach) for a small range of either apparent or true wind speeds (since one will always get you the other) (i.e., 5 knots, 8 knots, 12, 18).
You then end up with a series of vectors which lets you know immediately what the true wind direction is at any reasonable collections of conditions, and all it takes is one night of homework for years and years of sailing.
The reason is that our boats don't sail that many different speeds, there are only a few basic "courses" and the range of wind speeds that we sail in is rather narrow.
It'll save you a whole lot of $$, and would be an interesting exercise. A perfect source for this vector information is Duttons or Chapmans.
Oh and BTW you'll learn an awful lot about wind and boat speeds while you're at it.
Notice: The advice given on this site is based upon individual or quoted experience, yours may differ. The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.