All,
The flat sail has been modified with a single mid panel dart
in an attempt to add camber. I will sail test it later this week.
I believe the a two dart panel would give a more refined
shape. The “camber appears more baggy than shaped!
Sewing a curved sided sail would certainly provide a better
shape but for these single polytarp sails, the darts allow
quick sail building particularly if using the double sided tape,
no sew techniques used by David Gray. I have included
static photos in nil wind. Note the effect of the throat hauling
parrel on the hanging of the sail ( the photos with no lifts
installed). See Arnie’s article here https://junkrigassociation.org/Resources/Documents/Arne%20Kverneland's%20files/
20111214%20Peaking%20up%20the%20junk%20sail,%20ver%2020111214b.pdf
Much adjusting to be done but fun stuff to do!
A few mistakes I noted. The luff tail tales are mounted too
far back. They should be 6 inches more toward the luff.
I believe I had my leech and luff directions confused while
sewing the lump of sail!
The high point of the camber appears too far back. Although
the peak of the dart is at 35% the actual high point seems to
come at the mid flat portion of the sail. I’ll find out more
when I can fill it with wind. I may have more bag than camber!
Curtis