Abstract: An automatic aircraft landing system (AALS) (10) for automatically landing an aircraft on a runway. The AALS (10) includes data acquisition apparatus (DAA) (24) for acquiring flight data pertaining to the descent of an aircraft along a flight path (26) defined between a final capture point (16) and a touchdown point on the runway. The AALS (10) also includes a fuzzy logic controller (FLC) (20) responsive to the flight data for providing control signals according to at least one set of flight guidelines to at least one of the aircraft's primary controls for at least urging the aircraft to essentially adhere to a guide path (28) along at least a portion of its flight path.

Abstract: A minimum weight horizontal and vertical stabilizer (188) which a primary torque box is formed within the skins (202, 204) and extends transversely from the most forwardly spars (190, 212) to the most rearwardly spar (196) to occupy spaces between all of the spars (190, 212, 192, 194, 196).