| 摘要 |
<p>An aircraft (1), e.g. an aeroplane or missile, has fins (6, 17) attached to tube (3) encircling the aircraft fuselage. When fins (6, 17) are pivoted, a predetermined difference in size or pitch of fin (6) relative to fin (17) will cause an aerodynamic imbalance, inducing tube (3) to rotate. This rotation produces a constantly revolving transverse force on the fuselage which induces the craft to automatically follow a spiralling flight path thus evading being hit by anti-aircraft weapons.</p> |
