In the navigation amazing looking machines, flying objects, special machinery, etc. I found this page with thousands of sketchets Tommy Forsgren. It's like having a good time watching your portfolio and then rest, think and retake. Not only cars, but other interesting little things. 
Following engineering and applied design to artifacts, I can not admit that the fascination for flying objects (especially helicopter) also motivates my interest and here's blog with exciting and attractive designs of these aircraft to stimulate the imagination of any one category of flying machines for adventure, like to put on board neurons blast off into space from the imagination of everyone. 
About the humble but vital Fenix \u200b\u200bII "Chilean" mine rescue of 33, I have a child fascinated by machinery and imagining all the process to build it (I remember a boy with a project bearing supercarretón designed between friends), and then checking the net I find this interesting blog with concepts for ships and machinery that shows interesting proposals. 
