Step 1: tornado catamaran olympic trials 1967 ayrs report. here’s the 1967 ayrs (amateur yacht research society) report on how the tornado, a "tortured plywood" boat. Boats designed by phil bolger & friends. most of these plans are available directly from the designer at: phil bolger & friends p.o. box 1209, gloucester, ma, 01930. I’m sure the impulse to rig kayaks for sailing is ancient. a hull shape easily driven with a paddle is even easier to drive with a sail. of course, a proper kayak is.