Patents
Heel Counteracting Airfoil - U.S. Patent Number 4,843,987, July 4, 1987. A wing sail capable of righting, as well as propelling, a watercraft and suitable for sailboats, shipping, and other applications.
Heel Counteracting Airfoil - U.S. Patent Number 4,843,987, July 4, 1987. A wing sail capable of righting, as well as propelling, a watercraft and suitable for sailboats, shipping, and other applications.
