This
sail is unusual in having two membranes - on most points of sail the
membranes are in contact with each other, but sailing downwind the
membranes can be opened so that the sail takes on the form of a
spinnaker.
making paper template for
sail
cutting out plastic film
for both sail membranes
joining film using
spinnaker nylon on each side and sewing the seam
adding reinforcements to
each corner and the trailing edge of each membrane
adding batten liners from
nylon
adding reinforcing tape
along trailing edge
two identical membranes
add webbing with velcro
for batten tensioner
outer batten sleeve -
doubling back the outer end
and fixing with
double-sided tape
preparing velcro tape
positioning velcro over
doubled outer end of batten sleeve ready for stitching in place
applying double-sided tape
to edges of batten sleeve
sticking and stitching in
place
adding reinforcement at
the front end of each batten pocket
preparing mast sleeve -
outer layer doubled back at each end and lining from spinnaker
nylon
attaching mast sleeve to
leading edge of one sail membrane
attaching other membrane
to sleeve
basic structure of the
sail now complete - eyelets and battens will be added next