Because we re-powered, we needed to find a new propeller that would better match the performance curve of our new Yanmar 4JH4-TE. After hearing good things about Campbell Sailer props, and how they reduce drag when under sail, as well as prop-walk when under power, we decided to give them a try. One of our friends at the marina has touted them to have reduced drag on his boat so much that he gets an extra half of a knot to a knot more under sail than when he had a traditional fixed prop. The price for the Campbell Sailor is comparable to a normal Michigan propeller which made the decision all that much easier. We've heard from a lot of people that when they first get them they always wonder whether or not there was a mistake made and they were sent too small of a prop by accident, and funnily enough, we thought the same. The difference is humorous, and with it installed, Moitessier looks like a fat man wearing a tiny hat. Hehehe.
|My pretty Proppy garden|
Before we installed it, Frank had to lap it to the shaft. This process is better explained here. Basically, lapping fine tunes the fit between the shaft taper and the propeller, making a tighter tolerance fit. After it was lapped, Frank sandblasted it with a sandblaster borrowed from a neighbor on a steel boat (God, I do NOT miss owning a steel boat!) then applied Interlux 2000 primer followed by 3 coats of Pettit Trinidad Hard Bottom Paint on both the prop as well as the shaft. The thinking behind this is that hard paint holds up a lot better to the wear incurred on the prop. We had inquired with the yard about their experiences with various methods of reducing prop fouling, and this is what they had suggested. They say that they get 2-3 years on the large sport fishers doing a lot more motoring than we will. Again, we'll see how it all works out.
|The fit before lapping. The light areas are the only|
places of contact between the shaft and prop.
|Lapping compound applied|
|Post lapping. Smooth prussian blue=good fit :)|
|Primed with Interlux 2000|
|Pettit Trinidad on and ready to go.|