1 4-

21

1 2-

4

3

BI-WING PLANE

5

68

7

1 6-

1 4-

1 6-

1 8-

9

10

11

12

1 8-

1 10-

1 10-

1 12-

14

13

15

x4

16

1 12-

1 14-

1 14-

1 16-

18

17

20

19

x4

1 16-

1 18-

1 18-

1 20-