jib track placement

[Rico]

Hey Marcelo,

Your 30" track COULD be sufficient for your boat provided it is in the right location for ONE of these sails... Either the 135% OR the 150% depending on where the track is...

I highly doubt that it would give you enough range to properly trim a 135% AND a 150% jib.

It is hard to say much without actually seeing the sails at work on your boat.

Proper sail trim depends on the specific sail (cut, shape, etc.) and the conditions (especially with a furler as they can adopt a strange shape under load when not fully unfurled...), as well as the location of the cars, AND the location of the track itself on the boat.

I've read a bit on the subject and found that Ivar Dedekam's short & sweet book "Sail & Rig tuning" nicely illustrated the basic points.

There are MANY discussions on the web, but many are confused and contradictory. It is all Physics, but there seems to be all sorts of opinions... The books help keep the focus on the topic succinct & to the point.

The right answer inevitably depends on the conditions... Wind direction, wind intensity, and intended course relative to this. As well as The sails, sheet geometry and the boat... it is not a very hard subject - just one that takes a bit of skill and 'art' as it depends on many variables.

[ebb]

Going to own the Dedekam book, Thanks for the tip.
Reviews are ALL positive, if not ecstatic, about his explanations and great diagrams.
Amazon samples one page of colored graphics that alone makes this book look really exceptional.

Local Barnes and Noble store don't have it in stock.
But they'll get it delivered to me for $19.32 in four days.

[commanderpete]

I try not to partially furl the genoa. The boat performs better with a reef or two in the main instead.

My genoa tracks don't run forward enough for a partially furled genoa either. I've experimented with using a "barber hauler" made up of snatch blocks on a short line attached to padeyes on deck. (like the small picture below). This way I can use the same genoa sheets and still pull the sheet down and inside a bit when the genoa is partially furled.

There is a pretty good general discussion on genoa sheet leads at the UKHalsey website with a few diagrams

http://www.ukhalsey.com/LearningCent...clopedia5b.asp

I'll reproduce it here in case the link fails



UK-Halsey's Encyclopedia of Sails
-- Genoa Trim

Chapter 1
Chapter 2
Chapter 3
Chapter 4
Chapter 5
Main Sail Trim
Genoa Trim
Sailing to Telltails
Chapter 6
Chapter 7
Chapter 8
Chapter 9
Chapter 10