Enertia, Enertia ECO, Revolution 4, Maximus, Fury, Fury 4. Boat Type; Step 2 Usage; Step 3 Engine Info; Step 4 Family Results; Step 5 Pitch; Get Started Now. Propeller slip provides an indication of the efficiency with which a boat is traveling through the water. The increased blade area afforded by the addition of the fourth blade can provide increased water displacement capability, lift, and grip, as compared to a 3-blade propeller. Please choose the type of boat below that corresponds most closely with your boat type. A rough guide to choosing the right propeller for your boat, including diameter, pitch, hole shot, prop slip, number of blades etc Aim for the midpoint or higher of the recommended operating range. Since 1968, West Marine has grown to over 250 local stores, with knowledgeable Associates happy to assist. Only if you care about insignificant, little items like thrust. This calculator is free to use as often as you wish. Important remarks: The propeller's pitch has a significant effect on the required engine power! Elite Series . We use an especially developed computer program, which ensures the determination of exactly the right propeller for your boat. It's a fast, easy way to select a prop. I didn't see downeast on any of them and there wasn't an option that fit my boat either (19' fiberglass flat bottom "downeast style skiff" I guess you'd call it?). People want to know how to make a boat propeller or the utilization of the boat propeller calculator to run your boat smoothly? Use your calculator to determine the tangent of the pitch angle. google_ad_channel = ""; The most important elements of propeller design and manufacture … Each boat and its use is slightly different, and sometimes different propeller lines could provide similar benefits. (Note: Results will often yield multiple propellers. When the prop is properly placed on the balancer, the heavy tip will tend to drop to the bottom naturally by gravity. Increasing the pitch will decrease engine rpms and decreasing the pitch will increase engine rpms. Engine rpms and pitch are inversely related. Calculate; Engine RPM. Solas and Rubex Boat Props. Prop Pitch = inches/rev (add 1 inch for cupped props) We proudly serve the areas of Spokane, Pullman, Coeur d’Alene, Hayden and Sandpoint The basics, they’re as integral to propeller selection as are performance goals and boat type. The diameter is determined by the revolutions per minute at which the propeller will be turning and the amount of power need to turn the propeller. Refer to your boat operator's guide to determine the gear ratio of the boat's power train. See our Prop Folder for additional information about propellers. How to Calculate Propeller Pitch. Boat Propeller Fit Guide. Only if you care about insignificant, little items like thrust. Mercury Propeller Selector. The pitch of a prop is the distance, in inches, one revolution of the prop will move the boat forward. Note that the propeller thrust will equal the hull drag, and as others have said, this is very complex and is not something you can calculate by just plugging into a simple formula. Address BBLADES Professional Propellers, LLC N5007 Highway 73 Princeton WI 54968-8666; Phone Phone: 920-295-4435 Fax: 920-295-4436 Store Hours google_color_text = "000000"; Boat Prop Calculator. Two identical boats with identical engines could be propped quite differently, depending on the usage, water conditions, and load. We know propellers, but most importantly we develop the entire driveline. Your propeller is a vital link between your boat and the water. Step 1: Boat Type. Pitch is the theoretical forward distance, in inches, that a propeller travels during one revolution. Sizing Propellers Those wanting to actually size a propeller for a boat (determine the best diameter and pitch) may find a free downloadable Propeller Calculator program from Castle Marine in the U.K. helpful. Results will differ, based on various factors including, but not limited to, application, conditions, and load. What’s important to you... Top Speed, Cruising Speed, Hole Shot, Load Carrying, Slow-Speed Handling, Slow Trolling, Fast Trolling? Be sure to take a look at the Prop Slip page for an explanation of how to find your prop … Boat Performance Analyzer from BoatRamp.com. Obtain speed data from a radar gun if possible, boat speedometers are notoriously wrong. Prop slip may be entered as either decimal or integer values (.15 or 15).Prop slip may be entered as either decimal or integer values (.15 or 15). Propeller Guide: Utilize our best in class boat propeller guide to find the correct propeller for your Outboard, Ski/Wake, or Stern Drive marine engine. Please contact a dealer once you've completed this process.). Once you provide the specifications on your engine, we will display all of the propellers that fit your engine. You will need to know your engine manufacturer, model or horsepower to determine which propellers will fit your boat. google_color_url = "008000"; Boat performance is equal parts power and propeller. If your engine is over revving, consider a propeller with more pitch. Mirage Plus, High Five, Trophy Sport, Vengeance, Laser II, Black Max, Bravo Two. Propeller diameter is first decided by the type of boat. The pitch is the distance a propeller moves and the amount of power needed to turn the propeller. This Prop Selector will help you calculate the right prop for your boat type and how you use it. If the RPM is below the recommended operating range, switch to a propeller with lower pitched blades. And the BIG variable is the prop. google_color_bg = "F0F0F0"; google_ad_type = "text_image"; Ventilation/cavitatio… Units Use this calculator to figure out just about anything in regard to propeller, ratio, RPM and speed. The Prop Selector will recommend a propeller based on the Performance Goal you select. Speed = Miles/hour If technical information is unavailable, determine pitch by entering Boat length. Performance in big or following seas 8. Find your ideal Mercury Prop in 5 steps or less. In real life, you also have to do a number of unit conversions between hours, minutes, miles, feet, inches, etc. To test the prop, run the boat at WOT and observe the maximum engine RPM on a tachometer. Shop with confidence - get free shipping to home or stores + price match guarantee! Boat Prop Guide. google_ad_height = 250; They are engine RPM, prop gear ratio (normally for 1.5 to 3.0), prop pitch (the distance that a propeller would move forward in one revolution), prop slip (the efficiency of the prop, lower at high speed, but perhaps very inefficient at low speed) and the boat speed in mph. Each inch of pitch size will change the RPM by 150-200 RPM. One of the greatest joys of being a boating enthusiast is choosing boat props. The two most important things to remember in choosing a propeller are that it meets your individual needs for your individual application and that it allows the engine(s) to run within the specified RPM range at full throttle.