If you are interested in "secret projects" and aviation might-have-beens, check out
RetroMechanix.com. Our most recent articles include a summary of the proposal for the North American All Weather Super Fury (an evolution of an earlier navalized F-100 proposal) from 1954:
It features 78 high resolution images, most previously unpublished. We also have an article on the Bell Supersonic Research Test Aircraft proposal of 1954:
...and an article on the McDonnell Douglas Quiet Attack Aircraft proposal of 1974, an early attempt at stealth:
All articles feature previously unpublished, high resolution images. There is plenty more content to come in the weeks ahead, so please visit frequently!
Best Regards,
Jared Zichek
Editor, RetroMechanix.com