From the Office of Cutaways
This is the real deal. This guy knows what he's doing. I'm floored at how perfect these things are. Makes me think that Japanese illustrator Kiyomi Tanaka has some kind of engineering background. According to Anime News Network he's worked on all the major mecha anime from the 80's and 90's as a layout artist. The layout artist is the one that takes the rough storyboards and draws what the background scene is actually going to look like so the painters can just go in there and add color and light. You REALLY have to have some drawing chops to do that job. And this guy has it.
You can see more cutaways (bigger images) and designs on Kiyomi Tanaka's Pixiv page here: LINK
-Jake