Sail 'lofting'....
Designing and cutting the main. I did not build a 3D frame to cut the sail on, just eye-balled the foot and leech. Blue material is .75 oz spinnaker fabric from Sailmakers supply shop. 11$ sq yrd! I bought 2 yards, probably enough for 4 mains.. I also got some very nice 'kite' super light white 'rip-stop' fabric from China (for the jib). Basting tape from local sewing shop. '000' chromed brass rivets and setter. Can't cut the jib until I know the forestay layout...fractional or not...
1) Lay out a right angle x, y, and hypotenuse, overall sized a tad smaller than the mast/boom
2) Added about 1/2-3/4" max curve to the leech, and about 1/2" max curve to the foot. used flexible tape to eye-ball the curve.
3) drew this in red on the workbench (next time I will use black, red did not show so well through the blue sail)
4) Laid out the material on a weave pattern I thought best
4) trimmed excess ahead of luff
5) taped down material and carefully hot-knifed it (hot knife OK...not great...have to go slowly...)
6) taped the head, tack, and clew
7) riveted points in #6 (need a punch or hot rod to make good holes)
8. used basting tape to fix dubro 518/883 crimps
9) looks OK for now...will see how she sails before adjusting sail cut.....