My windsurfing obsession has heavily influenced my work of late and I have made a collection of glass sail pendants:
12.5 sq cm, 6cm luff.
Non adjustable battens, no cams.
Very high skin tension and very stable shape.
Quick to rig, no downhaul required.
Low swing weight, shouldn't twist off even in very high gusts.
Rigs on a 41cm nylon coated stainless steel wire with 5cm extension chain.
Not recommended for use in water.
Rigging...
Just for fun I added a board to this one...
The sails and board are made of multiple layers of dichroic glass, art glass, glassline paint, dichro paper and dichroic glass stringer, kiln fused, coldworked and wrapped with coated copper wire.