I am currently trying to build The Orville, and before I got too deep into he process, I wanted to see if the engines were even possible to do in Lego while staying true to the shape of the actual ship. I have had minor success; I have the oval shape, but the part I am stuck on is how to make the outer edge higher than the inner edge. I am trying to avoid huge gaps between the angles because the ship has extremely sleek lines and that would ruin the aesthetic. Here is what I have so far in terms of a proof of concept:
Reference model: here