Method for modifying engine loading through changing of propeller blade shape by bending a propeller blade edge to modify the section camber and pitch of the blade, and propellers made using the same

A method of altering the pitch of a propeller coupled to a vessel, comprising:

• altering a camber of a propeller blade by bending a portion of an edge of the blade relative to an opposite edge of the blade;
• and
• changing a pitch of the blade up to 30% at any radius on the blade.

A method of altering the pitch of a propeller, comprising:

• changing a camber of the blade by bending a portion of a trailing edge of the blade relative to a remainder of the blade, the portion of the trailing edge being located away from a tip of the blade at a distance that is less than or substantially equal to 60% of a radius of the blade.

A method of altering a pitch of a propeller, comprising:

• positioning a straightening tool on the propeller blade at a position away from a tip of the blade at a distance that is less than or equal to 60% of a radius of the blade;
• and
• changing a camber of the blade by using the straightening tool to bend a portion of an edge of the blade relative to a remainder of the blade.

A method of altering the pitch of a propeller coupled to a vessel, comprising:

• altering a camber of a propeller blade immersed totally under water by bending a portion of an edge of the blade relative to a remainder of the blade, the bending of the edge commencing at a distance in from the edge of up to 50% of a section width of the blade.

A method of altering the pitch of a propeller, comprising:

• changing a camber of the blade by bending a portion of a leading edge of the blade a predetermined distance in a predetermined direction relative to a remainder of the blade, the portion of the leading edge being located away from a tip of the blade at a distance that is less than or substantially equal to 60% of a radius of the blade.

A propeller comprising:

• a plurality of propeller blades;
• at least one portion of a trailing edge of each propeller blade comprising a first corrected portion located between a tip of the blade and a point on the blade located up to 60% of the radius of the blade away from the tip.

A propeller comprising:

• a plurality of propeller blades;
• at least one portion of a leading edge of each propeller blade comprising a first corrected portion located between a tip of the blade and a point on the blade located 60% of the radius of the blade away from the tip.