Corrects Worst Case Scenario Boat Performance
The changing conditions that I
had put on my boat were;
Now the question is how do I fix the performance of my boat and after much research I decided that if anybody could accomplish the task it was Robbie Patterson at Real Deal Propellers. After talking to Robbie we both decided that this was a perfect scenario to test his new FnR prop. The new FnR (4 blade) props dual blade profile design blends two completely different propellers into one prop. Giving you the Hole Shot bow lift and weight carrying capabilities of a round blade propeller and at the same time providing Mid-range Acceleration stern lift and top end speed of a surface piercing performance propeller. The result you get from combining these two very different blade styles creates a propeller with surpassed handling and stability, Quicker hole shot, Harder acceleration and Higher top end speed as a result of a lower slip ratio from the new FnR prop. So on a hot summer morning I meet Robbie at Sanderson Marine (1-888-261-PROP) as they are the exclusive dealer for the new FnR prop.
The weather conditions on this hot summer day were; Air temperature 92 degrees, humidity from 10:00am to 2:00pm was between 92 and 100%, Water temperature 93 degrees. Depending on how you look at the weather conditions they were not the best conditions for boat performance but great for a realistic scenario of how my boat is used. Keep in mind the very hot and humid air affects the optimum performance of the engine. All speeds during the testing were recorded using a Stalker radar gun and confirmed with GPS. Hole shot times were measured from 0 to 30 mph.
Now for our test results;
My boat is a 1999 Bass Cat Cougar with a 225
Mercury EFI 3.0l outboard, 6 manual jack plate, Guide loaded, Full
livewells, Full tanks of fuel. Myself and two persons onboard, I think
it is important to note that we were not known to miss any meals.
5500 Rpms att 61.1 mph
5500 Rpms wtt 63.7
Holeshot , 14 seconds
10-12 lbs of water pressure
Now with no other changes but an FnR
We raised the jack plate 3/8 of an inch, the
only change for this run,
After some calculations Robbie decided that we needed to go back to Sanderson Marines shop and raise the jack plate another 3/8 of an inch, add an Allison fin and put on water inlet scoops to raise the water pressure, a must at this point.
Now with the same 25 pitch FnR prop;
Robbie changed the prop to a 25 pitch FnR
prop w/light cup
Now we decided to make a little change in the
amount of weight on the boat by pumping out the livewell (the only change
for this run)
We decided to make a run with one more change and that was to take one person off of the boat, for a total of two persons on board (myself and one more). Now keep mind the objective was to get the boat to perform better under the load requirements of my guiding, not for extreme speed. I pressed down on the hot foot and in about ¼ of the distance we had been using for our testing the boat was up on plane and running 70 mph, very stable handling, and the boat had much more power to go, but I stopped as I was happy with the results and the boat is not going to be used at these kinds of speeds.
Since the initial testing and set-up of my FnR prop and the original version of this article that I wrote for the September 2005 issue of Woods & Waters magazine. My FnR prop has continued to provide the same level of performance in the real world of my guiding as it did during the testing and set-up. I have noticed better fuel economy with the FnR prop and I never thought that my Bass Cat Cougar could possibly improve in the rough water handling department, when the Upper Bay gets rough the FnR prop holds its bite and makes boat handling/control a breeze!For more information and pricing on the FnR prop you can contact Robbie Patterson at Sanderson Marine, phone# 1-888-261-PROP or www.sandersonmarine.com .Sanderson Marine is the exclusive dealer for the FnR prop and keep in mind this is a custom prop and there is generally a waiting list. Also you can be assured that Robbie will make sure your boat is set-up correctly even if the right prop for your boat is not his new FnR prop, as I stated in the article I would have been happy with my boats performance earlier in the testing but Robbie continued testing and setting my boat-up with different props until he felt it was the best we could get this Worst Case Scenario!
Thanks & Good Fishing, Capt. Karl Bunch
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