3d cad model for a 10'' diameter 9'' pitch outboard motor

[matty87]

Hi guys im new here so sorry if this is in the wrong section but ill ask anyway.

im currently undertaking a thesis project investigating a nozzel type prop guard and improving its efficiency. im problem/question for you good people is does anyone have a 3d model of a 3 or 4 blade outboard propeller of 10'' diameter and 9'' pitch. as i am no expert at cad and the prop modeling is out of my depth.

alternativly does anyone have any suggestions as to how i may be able to produce such a modle for myself, ie any good free software etc

cheers fellas
Matt