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b2 bomber had an electrified hull
For reasons not yet de-classified, the B-2 charges its leading edge to a very high electrical potential difference from its exhaust stream.
It has been suggested (by Jane's Defence) that it augments the B-2's low thrust main engines. It is also a well known phenomenon that an ionised gas (plasma) will scatter a radar beam far more effectively than a solid surface of any conceivable shape. This could be the purpose of the high voltage leading edge. Another possibility is that it is for the purpose of reducing drag, since the leading edge of the B-2 might then move through a partial vacuum of ionised air which may be ionised and repelled by the high voltage. In any case, it is however true that Northrop engineers conducted wind tunnel tests using high voltage on a testbed wing leading edge to reduce supersonic drag as far back as 1968. These tests were with a view to breaking up the airflow ahead of the wing using electrical forces in order to soften a sonic boom. How this applies (if indeed it does at all) to the B-2 after an interval of many years is uncertain.
Originally posted by FantasmaTaans
Alls I'm saying is, careful where you tread. The USAF is real cautious of top secret info. IE Stealth. I would ask no more.