Quote Originally Posted by champ20B View Post
Ill be glad to help on this. Props are my thing.

Now, about high rake...It is basically the leaning of the blades from the hub rearward toward the aft at the blade tips. The reason for this is to accommodate a bigger grab of water while attaining the need of a smaller diameter for high rpm performance (racing). If you see a high rake prop, you will notice that for its respective diameter, it has a longer leading edge on the blades with a smaller trailing edge to grab a lot and stream it down, and having a smaller diameter can wind up. A low rake of the same diameter would have less leading edge slightly longer or equal to the length of the trailing edge in some cases, of which is for recreational (general purpose use). That is all it really is. A cleaver prop is simply referring to its shape as having a straight trailing edge. A round ear has rounded edges of different varieties. The term "chopper prop" is simply a nickname given to props used for racing that are partially or half way out of water thus chopping the water to reduce unnecessary friction for free horsepower at high speed (not for a regular boat though). A chopper can be round or cleaver. The choice of a rounded or cleaver is just a matter of personal preference. One isn't necessarily superior over the other. Both kinds are used on High performance and/or racing V-bottom, flat bottom, or hydros of different types. I Hope this helps.
One thing about cleavers is that they are usually high rake. The straight edge helps to accommodate this configuration. However, rounded props are also often made as high rake, as a racing application, simply having a rounded tip instead of a sharp pointed blade tip like a cleaver though they may be a bit more limited in how much rake they can have by design. Trim has nothing much to do with it. If you need it for one, youll need it for the other either way.