Re-design, I wanted to do an insect-like alien swarm of flying things. They would have the ability to re-purpose human machines like jet turbines and helicopter blades. I came up with the "Recombinant Swarm," consisting of a flying creatures that can attach to and combine with a super carrier creature. All in all, I wasn't too satisfied with the final design, but it was fun anyway:
Initial ideation thumbnails... I really had no idea what I was going to do.
Also, a quick sketch of a Lotus 49 I did for a friend while we were eating at a restaurant:
Another military vehicle: