Quote Originally Posted by Stainless View Post
Great reply HB, I thought I knew a lot about props, that video was very interesting! If you don't mind me adding a little, labbing also thins the blades for more efficiency, in other words a thin blade spins easier than a thick one. As a result engine RPM's usually increase with labbed propellers. Labbed props are more fragile and usually no warranty comes with them.


CH3NO2
Good point. In a very simple way you can make a 30 cruise like a 30 but rpm like a 28. You can also change cup and diffuser dimensions to fine tune bow and transom lift as well. Prop tuning and testing is one of the most time consuming and over looked aspect of any boat setup. It can yield great results but takes patience.


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