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Thanks Gents!   That is very helpful.  Looks like I got pretty close.  I can definitely grab more wind and carry it down with good boat speed.

 

What does your luff look like?   I'm debating whether I need to rig a 4:1 tack to increase luff tension, but I'm not sure what an optimal luff would be for a sail like this.

 

The luff line is 6mm Dyneema and thus should be able to take a load.  However, if I head up a bit high, and luff the luff, it responds with a loud CRACK! when I fall off.   I would like to minimize this because of the shock on the very light fabric.   It is two layers of .75 Mylar with a grid of Twaron fibers in between.

 

As info, the prod is 2 meters long.

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The loud crack is something i experienced with my old screecher. I always thought it was lack of luff tension that caused it.  I have a normal 1:1 halyard, which I haul to the top. then i use a 2:1 tackline onto a winch. we winch until too scared to winch any more. I believe you should have as much tension as you can on the luff. 

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 I believe you should have as much tension as you can on the luff. 

baring in mind

 

The luff line is 6mm Dyneema and thus should be able to take a load. 

has more than enough strength to lift your entire boat out of the water which is also more the more than enough to rip your rig out of the boat.

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