Here is quite interesting cargo aircraft project by Kaiser Cargo Inc. It may have been studied parallel to Hughes HK-1 Hercules:
http://warandgame.wordpress.com/2007/09/08/kaiser-tailless-airplane/
NACA report(very technical...) as PDF:
http://naca.central.cranfield.ac.uk/reports/1946/naca-wr-l-531.pdf
http://warandgame.wordpress.com/2007/09/08/kaiser-tailless-airplane/
NACA report(very technical...) as PDF:
http://naca.central.cranfield.ac.uk/reports/1946/naca-wr-l-531.pdf