Modeling a 3 Blade Boat Propeller I  am trying to model a 3 blade boat propeller,  like the one shown in the image.  The image was taken from : http://sdshobbyusa.net 



I wasn't able to come up with a good way to model this propeller.  Does anyone know a good technique for modelling this hard surface model with good topology ? 

Thank You!



I believe I have gotten the result that I desire. I still need to work on it a little to make it even better.  I did it because of PGmath 's help  (https://blender.stackexchange.com/users/5705/pgmath) . Thank You!



and
Here's how I would create a propeller like the one pictured.

First create a cylinder and extrude 3 of the faces out and model them into a propeller blade shape.  To get decent topology you can extrude along the edge of the blade and then use Grid Fill to fill it in.



Then just add a Simple Deform modifier and set it to Twist, I used an angle of 90°.



Note: in the above example, instead of modeling all three fins at once, I deleted a third of the cylinder and used an Array modifier with the pivot point set to an empty rotated 120°.  That way I only had to model one blade.