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Shaft drive Gori 3-blade propeller (untreated taper)

This is a shaft drive Gori 3-blade propeller (untreated taper).

The drag resistance in a closed state is very low, providing an advantage during sailing, and minimizing entanglements with "seaweed" and ropes. During sailing: The blades are automatically closed while sailing. To keep the blades in a closed position, the shift lever should be placed in reverse to lock the shaft. When moving forward: By placing the shift lever in the forward position, the blades will automatically open to the forward position. To switch from "overdrive" to normal forward, the shift lever should be set to neutral, reducing the boat's speed to about 1 knot, allowing the blades to close before shifting back to forward. When moving in reverse: The blade position in reverse is 180 degrees from the forward position, and since it uses the same edge shape, it is very efficient even in reverse. Forward overdrive: The overdrive function is achieved by first moving the boat in reverse and then shifting the lever to forward while keeping the propeller in reverse. This allows for a more powerful forward thrust while maintaining the blade state of reverse.