The exercise also requires the creation of a "hub" on which I attach three copies of the turbine blade. The hub needs to have some material removed from its back side but I am not sure how to do this. I have managed to create all elements of the hub - apart from this bit. The first three wirefram drawings are what I currently have as parts and the far-right most image is a drawing from which I am trying to replicate the hub from. Which functions should I use to remove the material with the given dimensions of R50 and 150 degrees?
