CW right to left: MD Quiet Aircraft, I think B-2 (with a mix of Northrop ATA), could be THAP (or what was on a Northrop fellowship program brochure of the early 90's), Bird of Prey and TR-3A.a few 'stealth' modelling projects on the bench ...
Northrop ATDC signature driven AX variantI think B-2 (with a mix of Northrop ATA),