Rotor Sailing Ship.
Anton Flettner's famous rotor ship Buckau was propelled by spinning drums upon which the wind acted to produce thrust. While it required a small motor to spin these rotors, the main source of power was the wind harnessed through the Magnus effect - if a drum is set to spinning in a wind, a thrust vector is produced at 90 degrees from wind impingement.
Unlike the original rotor ship, this little model uses an unpowered modified rotor which also provides rotary shaft power to spin an underwater propeller. It's actually a Magnus windmill that will spin regardless of the wind direction.
Four pages ( 2 sheets - front and back on both sheets ) B & W photos, illustrations, materials/parts list and instructional narrative.
My plans are from original source materials such as books, magazines and other publications and the pages are carefully removed.