71441 ⎘
Arrangements on vessels of propulsion elements directly acting on water of paddle wheels, e.g. of stern wheels movably mounted with respect to the hull, e.g. having means to reposition paddle wheel assembly, or to retract paddle or to change paddle attitude
Steerable and retractable paddle-wheel mechanism for propelling a boat
#2Marine propulsion unit
#3RETRACTABLE VERTICAL-AXIS PROPELLER DEVICE
#4Propulsion system for a watercraft
#5Device for boat propulsion or energy production
#6Paddle wheel yacht
#7Paddle-Drum Propulsion System for Propeller-Based Watercraft Engines