Portable sail structures

Positioning device for a free-flying kite-type wind-attacked...

Pre-feeder for a main sail

Pressure sensing on rigid sails

Process for producing a convex sail or a tensile structure

Propulsive wing with inflatable armature

Pulley

Pulley

Quick attachment release jib handling and stowage system

Quick-release fitting for a sailboat stay

Ram-air inflatable beam for use with a spinnaker

Reconfigurable foresail

Reefing apparatus for a sailing ship

Reinforced opening

Reinforced sailcloth

Reinforced sailcloth

Reinforcing patch for sails and method of making same

Relating to wingsail craft and wingsails therefor

Reversible camber airfoil

Reversible camber line flexible wing sail