: Don it is so unusual to come across someone that has actually made sails as
: his trade. I understand that making a batten sail is overkill for what I
: am it putting it on but it has taken on a life of it's own and dragging me
: with it. I'm glad you confirmed the battens are thinner at the luff.

: "There was a sail maker the used full size molds to set

: I thought the above you mentioned might be one way to build a panel sail
: also.

: And I also come across the block diagram for doing the same thing. The center
: is the foil shape and the 4 to 6 degree tapers allow for the seam width
: with an extra height of camber but when sewed together the sail comes back
: to the original camber because of the seam overlap. The cloth is over
: lapped and cut on the center which makes built in seam width and when it
: is sewed together it comes back to the original foil shape. Mathematically
: you get the seam width by the degree used. I thought I would make a model
: someday and try it. I have no idea if it would work.

: John
One of the reasons sail makers cut the seams was to not show your take ups,not give the competition any help, we would take the panel and draw the seam take up on the cloth that is pined to the floor, then use double stick seam tape panels together. I would guess on this small of a sail they would be around 1/2" to 1/4" going from 0 to 1/2 at the luff from the 30% line drawn from top to bottom. This is where the quick full size mock ups with 3mil plastic would work great. Smaller sails we would just tape them at the seams, sew the luff tape on and go try them out. We use a 3 M tape if not in the sun to long you could reset the seams. Still had to redo the luff tape Sail makers make lots of sails that costumers never see. My loft was with in walking of the marina, many have masts in the parking lots.
The advantage of the rigg you are choosing is, no boom, or head smacker, should work great on a yak.
Don