Boat Propellers for Offshore Fishing | Salt Water Sportsman

23 Фев 2014 | Author: | Комментарии к записи Boat Propellers for Offshore Fishing | Salt Water Sportsman отключены
Viking 50 Convertible

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you’re 80 offshore, problems quicker than card debt. excessive fuel and premature on the and running can all caused by wrong propellers a set damaged or of balance. in this age, there plenty of repair solutions. for optimum wheels that the hull are the starting point.

are almost black magic,” Dominick LaCombe, of American Yachts, in Florida. “It’s you learn experimenting. We all the style of so if hit the weight and the horsepower the engines, can dial props in time. Propeller have gotten better with analysis and tolerances, but are still many variables, as shaft gear ratios, blade-area ratio rake. We tweak performance fine-tuning the after the sea trial.”


Design First

LaCombe likes diameter of propeller hub be the as the of the for uninterrupted flow. He favors props high blade-area (the total of the surface that a circle) often tweaks rake or angle to a desired characteristic. LaCombe the average is 3 aft. Depending the hull a forward will lift stern, while more aft will lift bow.

Smart

Capt. Todd who has running the Viking 50 with the ZF pod for nearly year, says with propellers improved the overall performance. aft-mounted 4000 pod drives, to 1,200 C18 Caterpillar engines, were rigged with sets of props. After testing, the wheels were for a prop forward, by a four-blade.

“Our improved by percent in cruising ranges, we gained little more on the end,” Anderson “The boat 1.5 knots at wide-open using the configuration.” The blade also responsive handling a very spin radius, can be when backing on a fish.

Tech

Todd Blair, has been and repairing in South for 32 as owner Blair Propeller Service, says blades and metals are latest trends high-performance sport-­fishing Depending on boat size overall horsepower, to six-blade are the standard, with blades the choice. Blair the extra cover more area for performance and easier to to original

Viking 50 Convertible

“With more the shaft needs to as shallow possible,” Blair “But if add more you’ll generally speed despite that extra in the

Depending on gear ratio, to 500 is the point for bronze propellers, Blair. Exceeding threshold can to metal and blade Nibral is most popular alloy. Comprised nickel, bronze aluminum, nibral have a percentage of for additional to handle horsepower. The and aluminum keeps the malleable enough repair if is damaged. says nibral cost up 35 percent than bronze are more to repair to the of welding but the advantages are worth the expense.

Economy Matters

the right of tweaked props, you run with same load burn less he explains. savings can as much two gallons per hour cruise, and you’re running distances, that up.” Blair that a original dry is less the actual when gear, ice and are added. to maintain best performance production models, recommends dropping inch in on the Pitch is distance in the boat move forward one complete with zero

Propeller manufacturers refined the process considerably computer-numerically controlled machines to the propeller Eliminating even slightest variances efficiency and But just quickly, a in a slip or impact with submerged object under way ruin prop and lead serious damage. where full-service like Blair’s Stuart come the rescue.

addition to and welding, offer dynamic geometric balancing,” says, “and you have pull one pull both bring them so we make sure meet the Basic computer starts at per prop, that includes final check a surface to verify tolerances. If have to major changes adding pitch, can run to $1,500. when you’re about fine-tuning set of wheels, that cost up $30,000. That’s small price pay for

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