propulsion system designed by a propeller (or more) to a shovel (or more), suitably contrappesata by a rod (opiu) provided for elongated radially and obliquely)with respect to the hub of the propeller itself, act, particularly for naval use.

摘要

Propulsive system based on one or more propellers each having one or more blades, properly counterbalanced with one or more bars of appropriate cross section, for naval or aircraft employ.