Tucker's 2nd try (The Carioca) was from a De Sakhnoffsky design, and potentially would have been made in Brazil

cover illustration of the Carioca from Dec. 1955 Car Life magazine found on aldenjewell's Flikr page http://www.flickr.com/photos/autohistorian/3516254868/

read all about it: http://www.kustomrama.com/index.php?title=Tucker_Carioca or check out the project at Rob Ida: http://www.robidaconcepts.com/carioca.html

Northrop YB-49 Flying Wing

Both found on http://redonly.tumblr.com/

if you want to learn a bit about flying wing design origin, it goes back to the mid 1930's: http://justacargal-s.blogspot.com/2011/02/burnelli-or-northrop-flying-wing.html