Many years ago I worked on a project that looked similar - we were developing radar cross section reduction materials for several planes one of which was the A12. It never made it to production or so we were told. Cool plane. I came up with the concept of a conductive polymeric foam which proved to be a great EMI/RFI shield as well for this project. DARPA took my 3 lab books and my 8 patent disclosures and thanked me for my contributions. I feel cheated yet proud!
Here is a pic of that plane - look alot like the other one. It was supposed to be a mini B2 that could launch off carriers.
