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Old 02-08-2015, 23:17   #1
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Seamanship

Are there situations when it's prudent to drop the mainsail and rely exclusively on a 130% Genoa?
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Old 03-08-2015, 00:16   #2
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Re: Seamanship

There are times when it is better to drop the main and rely on a small headsail, which could be a deeply furled 130% genoa. There are also times when it is not. What kind of situation were you thinking about?
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Old 03-08-2015, 00:25   #3
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Re: Seamanship

Sure, why not?

I do this all the time going downwind in strong wind. Boat is much more stable with the center of effort further forward, when you are going downwind, plus you don't have to deal with preventers. Consequence of an accidental jibe is far less dangerous.

My boat sails well with headsail alone even on the wind. But YMMV -- some boats won't balance well like this. Everyone should try it, however, as if it works, it can be another way to get a different amount of sail up without rolling up a headsail, which destroys its performance and wears it out rapidly.
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Old 03-08-2015, 00:34   #4
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Re: Seamanship

Yep... Lazy down wind beer drinking mode.

That also includes the panicking Mother in law mode btw. Basically if you have someone on the boat who is new and nervous. There is less going on to scare them.
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Old 03-08-2015, 00:44   #5
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Re: Seamanship

Recently sailed 18 hours in 30+ knots wind coming from behind, 2-3 meter waves with only the 105% genua up. Stil averaged over 7.5 knots. Had to hand steer since the wave pattern was such that the autopilot couldn't handle it.

We frequently sail with only the genua up, as dockhead says - no fear of an accidental gybe and no screwing around with preventers, more comfortable ride.
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Old 03-08-2015, 01:40   #6
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Re: Seamanship

What does the 130% stand for in the Genoa?


Belay that, I just learn all about them in Wiki.. Wonderful wiki.
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Old 03-08-2015, 02:40   #7
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Re: Seamanship

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Originally Posted by GGDevine View Post
Are there situations when it's prudent to drop the mainsail and rely exclusively on a 130% Genoa?
Absolutely. Strong wind, downwind, the boat will be far easier to steer if it's being dragged by the nose.
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Old 03-08-2015, 02:53   #8
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Re: Seamanship

SOP DDW for me in any sort of weather but when I need to reef the genoa beyond the third dot I put it away completely and start working my way down through my storm jibs. Centre of effort just gets too high when most of the genoa is rolled away.

Wind vane self steering works better like this as well.
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Old 03-08-2015, 04:31   #9
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Re: Seamanship

Greetings and welcome aboard the CF, GGDevine.
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Old 03-08-2015, 06:50   #10
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Re: Seamanship

As mentioned, sailing down wind. Also, often when sailing single handed I sail with self furling Genoa only to reduce my work load.

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Old 03-08-2015, 07:00   #11
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Re: Seamanship

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Originally Posted by Rustic Charm View Post
What does the 130% stand for in the Genoa?


Belay that, I just learn all about them in Wiki.. Wonderful wiki.
I think Wiki's a bit off the mark. AFAIK, the genoa number refers to the width across the sail from luff to clew, as a percentage of the J measurement.
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Old 03-08-2015, 07:26   #12
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Re: Seamanship

Ditto all the others - a few years ago on a 8 day passage from the Ches Bay to Tortola we didn't raise the main for the first 6 days. All deep down wind on 140% genny or sym spi. A sleigh ride.....

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Old 03-08-2015, 07:32   #13
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Re: Seamanship

i sespecialy prudent once th mainsail blows out in a 20 kt blow due to age.... then ye best have some bit of a jib up or you may find rocks. th ejib is essentially your steering sail, and yes, use it.
in storms is especcially prudent, as you CAN sail a sloop in a storm, if you actually use the jib-- roll it up into a small diaper in bad storms and sail.
when picking a mooring, i double dog dare you to be able to steer a sailboat into th e position you need without the jib, so last sail down is jib.(engineless mooring pick up)
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Old 03-08-2015, 08:02   #14
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Re: Seamanship

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Originally Posted by Lodesman View Post
I think Wiki's a bit off the mark. AFAIK, the genoa number refers to the width across the sail from luff to clew, as a percentage of the J measurement.
Not to hijack the thread but I am curious. It's my understanding the genoa % is determined by dividing the distance of a perpendicular line from the luff to the clew by the "J" measurement.

Since the "J" measurement would be the hypotenuse of a right triangle when constructed that way, wouldn't the clew of a 100% jib extend beyond the mast and appear at first glance to be a genoa?

Wouldn't it be easier to just divide the length of the foot by the "J" measurement and call it a day?

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Old 03-08-2015, 15:23   #15
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Re: Seamanship

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Originally Posted by Lodesman View Post
I think Wiki's a bit off the mark. AFAIK, the genoa number refers to the width across the sail from luff to clew, as a percentage of the J measurement.
Specifically, it's LP (Luff Perpendicular) which is the width from luff to clew at right angles to the luff. (as opposed to at the foot which some people think.

Once again Wikipedia gets it wrong. Note that a 100% genoa overlaps the mast, contrary to what Wikipedia's definition would imply.
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