Tham khảo tài liệu 'cách xếp hình bằng giấy - phần 4', văn hoá - nghệ thuật, khéo tay hay làm phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Biplane II by Marc Kirschenbaum NY 1996 Complex A 10 square makes a model with a 4 wingspan 1. This will be the color of the body. Precrease along angle bisectors. 2. Valley the corners to the intersections of creases and unfold. 4. Valley to center. 7. Unfold entirely. 5. Turn over. 6. Fold sides to center allowing 10. Valley down as far as possible and unfold. Repeat steps 9-10 behind. 11. Spread open to reveal small 12. Sink triangularly halfway. flap. 12-13 13. Close back up. Repeat steps 12-13 on the other side. 14. Petal fold. 15. Valley to intersection of creases. 16. Precrease sides of flap and then open up. Repeat steps 14-16 behind. 17. Valley corners. Turn over. 18. Swing a flap over front and back. 19. Precrease through all layers. 20. Unfold bottom flap. 21. Squash. Do not flatten completely. 22. Wrap around to make symetrical. 23. Pull out single layer. 24. Valley over. 23-26 25. Reverse fold. 26. Swing over flap while incorporating a reverse fold. Repeat steps 23-26 behind. 27. Repeat steps 18-26 in mirror image. 28. Valley up corners. 29. Pull out hidden corners. 30. Pull out hidden points. 31. Crimp sides. 32. Valley down four points. 33. Stretch apart sides. 34. View from step 33. Doublecrimp upwards and flatten. 35. Repeat steps 33-34 on other side. 36. Lightly swing up top section. 37. Swing back down while collapsing the top single layer outwards. 38. Repeat steps 36-37 behind. 39. Swing down .
