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Material: Nickel Aluminium Bronze Alloy86 ksi tensile strength, and 36 ksi yield strength, in accordance with ABS Type 4.Number of blades: 4 Diameter: 30 inchesPitch: 31 inchesD.A.R.: 0.85Rake: 0Skew at the tip: 18 through 21 degreesBore, for 3 inches shaft: SEID 2.438 inches and taper 1:16 Hub: FEOD 4.625 inches, AEOD 4.25 inches and 9 inches long Keyway: 3/4 inch wide x 5/16 inch depth, nominalBlade thickness shall be according to the ABS Rules for Building and Classing Steel Vessel 2008, Part 4 (Vessels Systems and Machinery), Chapter 3, Section 3, paragraph 5.1 (blade thickness). Leading-edge thickness shall not be less than 0.236 inches at a radius of 15 inches.
