Seahawk Propeller Estimation Form
(Please complete and submit this form)

We are happy to offer selection advice on propellers for sailboats, without obligation.

Please note that the better the information you can provide to us, the better our advice to you will be.

(If you prefer to print & fax this form to us then please open the printable version or PDF version.)

As a bare minimum, to be able to calculate sizing, we require all items marked in bold underlined text.

Make/Model/Design of Vessel Hull Type Racing Cruising Motor Sailer Trailer Sailer Catamaran Trimaran Keel Type Propeller Space Limitation Full Keel / Aperture with space limitation Propeller has no space limitation Displacement (best estimate of actual sailing weight) tons / tonnes Lb's Kg's Waterline Length Feet Metres Engine Make & Model Engine CONTINUOUS rated output HP KW @ RPM Engine MAXIMUM rated output HP KW @ RPM Single or Twin ENGINE Single Twin Single or Twin PROPELLERS Single Twin Shaft Drive or Saildrive Shaft Sail Other e.g. hydraulic Gearbox Reduction Ratio If unsure, please provide all details off the Identification plate on the gearbox in the notes box below :1 (eg. 2.3:1) Shaft Size Inches MM Shaft Taper SAE 16:1 ISO (Metric) 10:1 British 12:1 Morse Taper Other - Insert details on Picture below Shaft Rotation Right (Clockwise) Left (Anti-Clockwise) Counter Rotating Propellers Description of your current Propeller? Diameter X Pitch Inches MM Number of Blades Large Blade Area Sailor Style / Thin Blades Max. Speed with this Propeller Knots MPH KPH   Any details you can give us in the next 3 boxes will help us to make a recomendation better suited to your current situation. Please comment on the performance of your current propeller What type of use do you typically use your boat for, such as extended cruising, coastal day use, racing etc? What would you like to achieve by changing your propeller? Are you looking for anything specific? Are you interested in a particular type/s of propeller? (select one or more options) Feathering Folding Fixed* * Export is not economical outside of Australian region for fixed option Name of Yacht Your Name Address State Postcode (Zip Code) Country Phone BH Phone AH Fax Email Address How did you find us? Search Engine Media Friend Boat Show Link from other site Other

REQUIRED DETAILS for NON-STANDARD SHAFT TAPERS Please fill in this section for dimensions from the shaft OR the following section for dimensions from your propeller A: Thread Diameter B: Taper Small end Diameter C: Keyway Width D: Shaft Diameter E: Taper Length F: Thread Length G:Thread Pitch Above measurements are in inches mm   OR   EXISTING PROPELLER HUB DETAILS A: Taper Length B: Keyway Width C: Taper Small end Diameter D: Taper Large End Diameter Above measurements are in... inches mm       SHOULD YOU SUSPECT THAT CLEARANCE MAY BE A CONCERN, PLEASE SUPPLY THE FOLLOWING MEASUREMENTS A: Approx Angle in degrees B: Tip of shaft to nearest obstruction C: Centre of shaft to Hull Above measurements are in... inches mm       PLEASE TYPE BOTH WORDS DISPLAYED BELOW AND THEN PRESS "SEND FORM" Note: If you get the challenge below wrong, you will be asked to try again, but the information you have entered above will not be lost.