The B-2 incorporates the same anti-radar reflectivity methods of the F-117A, but in different proportions. While the F-117A has a conventional aluminum structure to which RAM is epoxied, the B-2 has a radar absorbent structure of which approximately 80% is composite material. Although the F-117A's manufacturing methods were advanced, the B-2's are much more so, using robotics to fabricate large areas of the structure.
