To provide a high lift generator capable of effectively generating high lift by realizing the circulation control by the Coanda effect while considerably reducing the manufacturing cost and the maintenance cost and considerably reducing the weight of the high lift generator.

In the high lift generator to realize the circulation control by the Coanda effect by ejecting the jet flow from an exhaust nozzle S formed behind a main wing, an outer skin part 12 of a flap 10 has a flexible structure, and the shape of the outer skin part 12 of the flap 10 is controlled by a shape memory alloy-made spring 20 and a bias spring 30. During the cruising, the bias spring 30 extends to form the outer skin part 12 of the flap 10 in a shape smoothly continuous from the main wing. During the landing/taking-off, the exhaust nozzle S of jet flow is formed between a trailing edge 2 of the main wing 1 and the flap 10, and the flap 10 is formed in an arc-shape suitable to the Coanda effect.

COPYRIGHT: (C)2006,JPO&NCIPI