The University of Tokyo

Isao Arai

Akira Takano

Masayoshi Matsuzaka

Hirotoshi Kubota

A method of stabilizing flight of a flying body having a circular cross-section by the use of a plurality of tripping wires, when the flying body flies in an air current at a high angle of attack with respect to the air current. And also a flight-stabilized flying body having a circular cross-section, comprising at least two tripping wires attached to the periphery of said flying body. The tripping wires are attached to the outer periphery of the flying body, by which an asymmetric side force acting on the flying body is reduced, thereby suppressing bad motion of the flying body, such as, rotation around the center of gravity of the flying body in a plane of an attack angle, i.e. the flat spin, yawing and the like motion. In a case of attaching two tripping wires to the flying body, an optimal angle of wire attachment for suppressing the undesirable motion resides in a region from 60.degree. to 45.degree. for the non-dimensional wire height of a region from 0.007 to 0.014. In a case of attaching more than two tripping wires to the flying body, an optimal distance of angle between adjacent two tripping wires resides in a region from 15.degree. to 45.degree. for non-dimensional wire height of a region from 0.007 to 0.014 and thus a number of the tripping wires required resides in a region from 24 to 8. In a case of the flying body comprising cylindrical and conical portions, the tripping wires are attached only to the cylindrical portion of the flying body for a Reynolds number region from 2.times.10.sup.5 to 4.4.times.10.sup.5.

Growing community of inventors

Soka, Japan

Isao Arai