Unbuilt aircrafts

[Sapiento]

Interesting stuff, not just aircrafts but tanks and ships too:

http://www.secretprojects.co.uk/forum/index.php

 

[The Kiat]

Unbuilt Aircraft

F-103
Avro Arrow
F-108
B-70

Anybody ever seen Secret Aircraft of the Superpowers on the History Channel?

 

[Shaucker]

Followed the link through and found http://www.adventurelounge.com/aircraft/, aircraft patents from around the thirties. Some buildings, cars &c. too, might be useful.