Ron

You need one extra gennakerblock for each gennakersheet close to the winches in the cockpit (depending on the cut of your gennaker) fixed on the foodrail (correct word??)

Just to be sure, are you talking about the rails which should also be used for the genuasheets?

 

Ron

 

I did not mean the rails used for the genuasheets.

I meant the aluminiumpart at the connection between the hull and the Deck

 

1. The tack (front corner) goes on the existing jib sheet.  Untie from the jib but leave it in the self-tacking track.  You will find it runs nicely to a block on the "steel pipe" on the bow and then up to the tack of the sail.  You can add a special line for the tack line - but since you don't use the gennakar and jib at the same time doubling up works fine.

 

2. The genakkar sheets run back to blocks fitted either on the pushpit base (there are rings there) or to blocks added to the toerail (or footrail or foodrail).  They then go onto the rear winches.   You can run both sheets at the same time (right round the outside of the boat).  You then gybe with the sail flying out right in front of the boat.  Or you just hook up one sheet at a time and use the snuffer to gybe.  The later saves the problem of the lazy sheet dropping under the bow.

 

 

 

 

 

I bought a Gennaker last year and had a discussion about the tack line with the sailmaker at this years Duesseldorf boatshow. According to him it is a common misbelief to tighten the tack line when sailing upwind because this will give the sail a fuller shape. 

 

Mex

 

source: http://www.diekow-segel.de/pdf/Trimmfibel_04_Leichtwindsegel.pdf - http://www.diekow-segel.de/pdf/Trimmfibel_04_Leichtwindsegel.pdf

 

If you compare the shape of the curve of the the front of the gennaker you will understand it. On the left the curve is much more visible than in the right picture.

 

It is the same what you do with your your mast if you want to flatten the mainsail. In stronger winds you tighten the backstay. Than your mast gets a curve. This way you flatten the mainsail. The diffrence is: the gennaker has no mast in front of it.

 

Your sailmaker is right.

 

it is a common misbelief to tighten the tack line when sailing upwind because this will give the sail a fuller shape.

 

Well, maybe it depends on how the sailmaker cut yours.  But all I have read on setting the gennaker has said the same.  I also find it works in practice.   It definately tightens the luff - which I believe is the idea.  

 

If letting out flattens the sail more, then try letting out going upwind and pulling in to go down.  It doesn't work like that when I try it.

 

See:

 

http://www.sailnet.com/forums/seamanship-articles/29095-trimming-your-asymmetrical-spinnaker.html - http://www.sailnet.com/forums/seamanship-articles/29095-trimming-your-asymmetrical-spinnaker.html

 

http://www.rambunctious-j92.com/downloads/Trimming%20Your%20Asymmetrical%20Spinnaker.pdf - http://www.rambunctious-j92.com/downloads/Trimming%20Your%20Asymmetrical%20Spinnaker.pdf

 

http://www.sailingworld.com/from-the-experts/technique/the-commandments-of-asym-trim-37295.html - http://www.sailingworld.com/from-the-experts/technique/the-commandments-of-asym-trim-37295.html

 

http://www.westawaysails.co.uk/Asymmetric.htm - http://www.westawaysails.co.uk/Asymmetric.htm

 

http://www.quantumsails.no/upload/Source/Pdf/asail_trim_j105.pdf - http://www.quantumsails.no/upload/Source/Pdf/asail_trim_j105.pdf

 

http://www.chutescoop.com/AsymmOpsPage.htm - http://www.chutescoop.com/AsymmOpsPage.htm

 

http://www.fxsails.com/spinnarticle2.php - http://www.fxsails.com/spinnarticle2.php

 

Several more on Google.  All say the same.  Many of them make these sails.   Bit of a mystery?

 

 

 

Isn't the final sail shape a combination (unlike that diagram which only reduces the tack).  When going more upwind you haul in both sheet and tack.  Wouldn't that combination flatten the sail?  It certainly pulls the sail forward and more central and, to my eyes, makes it less balloon shaped.

 

Panos?