Prop Up

To create the propeller for the aircraft, I used the low poly modelling technique. I started off with a cylinder, this had 7 segments and had a small radius. I then converted it to an editable poly from which I selected the vertex points segment by segment, expanding them until they reached the desired width. I then went into the modify menu and selected FFD 2x2x2. From this I selected the top 3 segments and used the select and uniform tool to narrow the top of the propeller. The FFD tool worked similar to the soft selection tool. It narrowed the segments little by little. I then converted the object back into an editable poly, from there I added various smoothing groups. 1 for the front of the propeller, 2 for the back of it and finally 3 for one of the edges along the left hand side. 

Now propellers have a curve in them, to achieve this, I selected the twist tool from the modify menu. I then applied a 45 degree twist which gave it a curve similar to one seen on a real propeller.

Adding smoothing groups to the propeller

Adding the twist to the propeller

To create the center of the prop that holds all the bales in place, I created a basic cylinder and collapsed it, I use the same shaping technique as I used for the blade and to finish it off I used various different smoothing groups.