Patent ID: 6837760

Claim:
A method of producing a desired percent increase in a shaft rpm of a vessel through localized bending of a propeller blade, the blade having a radius measured from an axis of rotation to a tip of the blade, comprising: bending a portion of a trailing edge located approximately 40-50% of the radius' length away from the axis of rotation to decrease a pitch of the blade 0-5/8% for each percent increase in shaft rpm desired; bending a portion of a trailing edge located approximately 50-60% of the radius' length away from the axis of rotation to decrease a pitch of the blade 1/8-9/8% for each percent increase in shaft rpm desired; bending a portion of a trailing edge located approximately 60-70% of the radius' length away from the axis of rotation to decrease a pitch of the blade 1/4-3/2% for each percent increase in shaft rpm desired; bending a portion of a trailing edge located approximately 70-80% of the radius' length away from the axis of rotation to decrease a pitch of the blade 3/8-15/8% for each percent increase in shaft rpm desired; bending a portion of a trailing edge located approximately 80-90% of the radius' length away from the axis of rotation to decrease a pitch of the blade 1/2-17/8% for each percent increase in shaft rpm desired; and bending a portion of a trailing edge located approximately 90-100% of the radius' length away from the axis of rotation to decrease a pitch of the blade 1/2-9/4% for each percent increase in shaft rpm desired.