17 steps. Design © Nick Robinson. www.origami.me.uk
Take a square sheet of paper, fold it in half sideways to make a crease and unfold.
Fold the side edges to meet the center line.
Fold the side edges to meet the center line again and unfold.
Fold the right top corner to the left, making it meet the previous crease. Unfold.
Fold the left top corner the same way and unfold.
Unfold the paper.
Fold the paper downward, creasing through the bottom points of the two previous creases.
Open the top right corner, folding along the creases you’ve made.
Open the left corner.
Tuck it inside the right pocket.
Fold the central triangle upward.
Fold the item in half backward.
Fold the first wing, bringing together the top left edge and the right edge.
Fold the second wing the same way.
Unfold the wings.
The Triplane is complete. Launch it into the sky!