PROBLEM TO BE SOLVED: To prevent decrease in measurement accuracy by stabilizing sufficiently a relative position relationship of a sufficiently rigid connecting body and test body.;SOLUTION: This jig has a bent connecting passage 7 therein, and pressure inlets 6a, 6b communicating with the connecting passage 7 are formed in a surface 23 of the jig which is brought into contact with that inside a wind tunnel model. The other end of the connecting passage 7 is formed in such a way as to be connected to a connecting tube joint 4. The wind tunnel model comprises connecting bodies (jigs) 5a, 5b respectively connected to the reverse side of a first surface forming member 1a forming a first surface 21 and to the reverse side of a second surface forming member 1b forming a second surface 22, and a connecting pipe 4 connected to the connecting bodies 5a, 5b. The first surface forming member 1a has a first opening 2a for the inlet of air, and the connecting bodies 5a, 5b have the connecting passage 7 connected to the first opening 2a, and the connecting pipe 4 is connected to the connecting passage 7. The connecting bodies 5a, 5b correspond to the jigs. The jigs are connected with high rigidity to a flat test body. As the test body is flattened further, its material becomes thinner, so that a space therein can be windened.;COPYRIGHT: (C)2000,JPO
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