AIRCRAFT WITH JET PROPULSION

摘要

There is here described a jet propelled aircraft of the kind in which the propulsion jets are directed over the top surface of the wing, so as to cause additional lift as a result of the supercirculation induced on the wing and the deflection of the jets downwards, due to the Coanda effect, immediately downwstream of the wing. The main characteristic of the aircraft according to the invention resides in the fact that the area of the top surface of the wing (9), over which the jets are directed, is defined laterally by two longitudinal surfaces (5) projecting from the top surface of the wing, so as to form a single surface ejector system in which the primary fluid consists of the jets (7), the secondary fluid consists of the relative air flow over the wing, in which the successive zones of expansion, mixing and recompression of the ejector are defined by a single active surface, consisting of the top surface of the wing (9). In a preferred embodiment, the wing (30) of the aircraft has a fixed front part (90) which occupies a minor portion of the wing chord, and a movable rear portion (101) which is articulated to the fixed portion (90) about a substantially transverse axis (110) and can be inclined downwards relative to the said fixed part (90). The portion of the wing between the two aforesaid longitudinal surfaces is provided on its trailing edge with a movable attitude control surface (120) of the aircraft. The aircraft also includes sensor means (60) designed to detect variations in the relative air flow direction in a determined flight attitude, and actuator means (60, 150) designed to control the aforesaid movable control surface (120) as a function of the output signal of the sensor means (60) in such a manner as to maintain unchanged the attitude of the aircraft.