Progress has been somewhat slow the last two weeks.  Machining the other side of the propeller, went well and it was exciting to have a full scale propeller in hand!

However, having it in hand and thinking in detail about the next step, applying composites over the foam, I realized it would be rather difficult to fit the cloth material over the sharp edges of the hub and that the hub needs to be redesigned.  At that point the computer I use for CAD and CAM went bad which brought the project to a standstill.  I just got that fixed and now I have a new hub design with a much smoother transition that should be easier to apply the composites over.  Hopefully the new design will be machined in the next few days.

Meanwhile, I've been researching the controls, and what controller to use.  For the first iteration of the design I'm going to use 2 vanes under each propeller for directional control.  This will require a total of 8 servos, plus one more for the engine throttle.

As for the controller, the Hackaday article on controllers, was an excellent starting point.  After looking at all the choices, I decided to go to the Pixhawk controller which will handle all the servos needed.  If anyone has experience with the Pixhawk and if there's anything I should know about it before using it for Goliath, I'd welcome any inputs.  Hopefully I'll start ordering controller parts this week.