Well here is something I'd really like to see scaled to it's actually dimensions in FSX. It's a concept but awesome to think about. Click on the link!!!!
http://elitedaily.com/featured/monster-jumbo-jet/ You might have to add your own thoughts about size but have fun with it. If I could learn how to use my 3D program I might have it up and running myself. But I'm hoping someone better beats me to putting it up on Simviation!!