As far as an opening device of fishing gears is concerned, applications of a kite are under development around the world. The typical examples are found in the opening device of the stow net on anchor and the buoyancy material of the trawl. While the stow net on anchor has proved its capability for the past 20 years, the trawl has not been wildly used since it has been first introduced for the commercial use only without sufficient studies and thus has revealed many drawbacks. Therefore, the fundamental hydrodynamics of the kite itself need to ne studied further. Models of plate and canvas kite were deployed in the circulating water tank for the mechanical test. For this situation lift and drag tests were performed considering a change in the shape of objects, which resulted in a different aspect ratio of rectangle and trapezoid. The results obtained from the above approaches are summarized as follows, where aspect ratio, attack angle, lift coefficient and maximum lift coefficient are denoted as A, B,

and

respectively : 1. Given the triangular plate,

was produced as 1.26

1.32 with A

1 and 38

B

42

. And when A

1.5 and 20

B

50

,

was around 0.85. Given the inverted triangular plate,

was 1.46

1.56 with A

1 and 36

B

38

. And When A

1.5 and 22

B

26

,

was 1.05

1.21. Given the triangular kite,

was produced as 1.67

1.77 with A

1 and 46

B

48

. And when A

1.5 and 20

B

50

,

was around 1.10. Given the inverted triangular kite,

was 1.44

1.68 with A

1 and 28

B

32

. And when A

1.5 and 18

B

24

,

was 1.03

1.18. 2. For a model with A