Complex

A 10" square makes a model with a 4" wingspan

1. This will be the color of the 2. Valley the corners to the 3. Pleat along existing creases.

body. Precrease along angle intersections of creases and

bisectors. unfold.

4. Valley to center. 5. Turn over. 6. Fold sides to center, allowing

flaps to swing outwards.

7. Unfold entirely. 8. Collapse. 9. Squash the center flap.

9-10

10. Valley down as far as 11. Spread open to reveal small 12. Sink triangularly halfway.

possible and unfold. Repeat flap.

steps 9-10 behind.

12-13

13. Close back up. Repeat steps 14. Petal fold. 15. Valley to intersection of

12-13 on the other side. creases.

14-16

16. Precrease sides of flap and 17. Valley corners. Turn over. 18. Swing a flap over, front and

then open up. Repeat steps back.

14-16 behind.

19. Precrease through all layers. 20. Unfold bottom flap. 21. Squash. Do not flatten

completely.

22. Wrap around to make 23. Pull out single layer. 24. Valley over.

symetrical.

23-26 18-26

25. Reverse fold. 26. Swing over flap while 27. Repeat steps 18-26 in mirror

incorporating a reverse fold. image. Repeat steps 23-26 behind.

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.

33-34

34. View from step 33. Double- 35. Repeat steps 33-34 on other 36. Lightly swing up top section.

crimp upwards and flatten. side.

36-37

37. Swing back down while 38. Repeat steps 36-37 behind. 39. Swing down flaps.

collapsing the top single

layer outwards.

40. Swing over a layer, undoing 41. Wrap around a single layer. 42. Swing back. Repeat behind.

reverse fold. Repeat behind. Repeat behind.

43. Pull flap out, releasing layers 44. Asymmetrical squash. 45. Valley layer through. Repeat

at left. Repeat behind. Repeat behind. behind.

46. Swivel down. Repeat 47. Swivel over. Repeat behind. 48. Bring single layer to surface

behind. (closed sink). Repeat

behind.

49. Sink triangularly, so as to 50. Sink triangularly again. 51. Wrap around a single layer.

match up with the folded Repeat behind. Repeat behind. edge in the middle. Repeat

behind.

52. Swing flap over while 53. Swing over two layers. 54. Pull out single layer from

incorporating a reverse fold Model will not lie flat. behind.

along existing creases.

55. Swivel under. 56. Swing single layer back. 57. Swivel up.

52-59

58. Wrap single layer around 59. Close model back up. 60. Repeat steps 52-59 behind.

(closed sink).

61. Swing over flap while pulling 62. Valley along existing crease. 63. Swivel down hidden middle

up a layer through the Repeat behind. layer into pocket. Repeat

pocket. Repeat behind behind.

64. Bring single layer to surface 65. Closed sink along existing 66. Pull point outwards.

(closed sink). Repeat crease. Repeat behind.

behind.

67. Bring the bottom points to 68. Swing down. 69. Precrease. Repeat with

the top, allowing the corners adjacent flap.

to spread sink.

70. Spread apart. 71. View from step 71. Sink 72. The edges of the wing

single layer through from should now be flush. Close

behind, using the creases the model up. from step 69.

68-72

73. Repeat steps 68-72 behind. 74. Sink triangularly along 75. Closed sink along existing

existing crease. Repeat crease. Repeat behind.

behind.

76. Outside reverse fold along 77. Detail of tail. Valley along 78. Unfold.

existing crease. angle bisectors.

Point A Point A

79. Swivel fold. Repeat behind. 80. Crimp upwards, so point A 81. Valley down. Repeat behind.

meets colored raw edge.

82. Valley along angle bisector. 83. Swivel over. Repeat behind. 84. Valley up. Repeat behind.

Repeat behind.

85. Mountain top flaps into 86. Mountain the double layer 87. Reverse fold back. Repeat

pocket. about 1/4th the width. behind.

Towards the tail, the fold will

terminate at an angle, and

at the other end, a swivel

will form. Repeat behind.

88. Mountain behind wing. 89. Valley to existing crease. 90. Crimp the tail section. See

Repeat behind. Repeat behind. step 91 for positioning.

91. Collapse upwards. 92. Outside reverse fold. 93. Sink the indicated regions.

94. Reverse fold the indicated 95. Valley over a single layer. 96. Pull the center flap fowards

areas. Repeat behind. while pulling the side flaps

outwards.

97. Open sink. 98. Reverse the four hidden 99. Reverse the first of the three

corners down. points down. Note how the

bottom five layers are

distributed.

99-101

100. Swivel. 101. Reverse into pocket. 102. Swivel.

Repeat steps 99-101

behind.

103. Tuck the bottom hidden 104. Spread apart the flap flat, 105. Valley down.

points into the center of while pulling it into an the model. upright position.

106. Valley up. 107. Valley down. 108. Undo pleat.

106-108

109. Repeat steps 106-108 in 110. Asymmetrical squash. 111. Squash.

mirror image.

112. Pull out single layer. 113. Squash. 114. Precrease.

115. Rabbit ear. 116. Unsink. 117. Swivel up.

118. Valley over. 119. Swivel. 120. Mountain behind.

121. Mountain behind. 122. Flip the points. 123. Valley through intersection

of creases. See step 124

for positioning.

124. Spread squash. 125. Swivel at each side. 126. Swivel at right. Bring

colored layer to surface.

127. Pleat downwards. 128. Completed propeller. 129. Valley up (there are no

reference points).

129-131

130. Pull the single layer up as 131. Pleat the excess into the 132. Repeat steps 129-131

far as possible. center pocket. behind.

133. Sread the wings apart, 134. Collapse the sides inwards 135. Completed cowl.

allowing the front to spread at 90º. You can trim the apart too. To flatten, fold sides to taste with the top of the cowl over. mountain folds.

136. View of lower wing. 137. Valley at 45º 138. Wrap a single layer 139. Squash over.

Precrease. through intersection around.

of precrease and

center.

140. Wrap a single layer 141. Spread squash. 142. Rabbit ear the tip of 143. Raise the wing and

around. the strut. strut, tucking its tip

into the pocket on

the upper wing.

Repeat steps 136-

143 on other wing.

144. Detail of landing 145. Valley up. 146. Pull out a single 147. Valley down while

gear. Precrease. layer from each incorporating

side. reverse folds.

148. Shape with 149. Round off with 150. Completed wheel.

mountain folds. mountain folds. Repeat steps 144-

149 behind.

151. Completed Biplane II