In this early sketch I've laid out the basics of my initial idea. This is likely to change as I go along, and I hope to end up with more of a mechanical look than is represented here. The lower right sketch shows a side view of the respirator
Here is a sketch I did today just for this blog, to show my latest thinking. I don't need or use sketches much for a project like this. The Underground Explorer started with a child's plastic astronaut helmet, and only a vague idea of what to do with it. The Defender was similarly constructed, starting with the Darth Vader helmet. I create organically and watch the project unfold, which I find much more enjoyable than someone handing me drawings and saying, "Make it look like this". And you, dear reader, get to watch it unfold with me.