I've been considering putting up a construction log for my current project in Minecraft, since I've been taking periodic progress screenshots, so I decided I'd go ahead and get started with it. You can see our map here, with the Hyperion behind Barad-Dur in the south-central region of the map (note the compass rose in the top-right corner).
Back around the end of October last year I was looking for a new project to work on and ended up deciding on building the Hyperion, Jim Raynor's flagship Battlecruiser from Starcraft 2. Fortunately the Battlecruiser features prominently in the game, so there are a wealth of screenshots showing it from various angles. I started out making some plans on my trusty pad of engineering paper and downloading a ton of screenshots. Here's a couple so you can compare. I'll put up pictures/scans of my schematic drawings a little later.
I decided to start with the nose and do some of the more prominent features first.
In this last one you can see the rest of the skeleton I have laid out to mark where the rest of the body and wings are going to go.
As you can see, it's quite large.