Step 1:
The other side of this army paper is grey.
Prefold over this line, then turn the paper.

Step 2:
Valley-fold over these 2 lines.

Step 3:
Push both corners inwards by making
a mountain-fold over the 2 black lines
and a valley-fold on the same place at
the layer below.

Step 4:
Fold over these 3 lines.

Step 5:
Valley-fold the wing upwards,
do the same with the other wing.

Step 6:
Fold the 2 edges straight upwards.

Step 7:
Open the back of the plane, see arrow.

Step 8:
Pull the tail upwards by making an inside reverse
fold over these 3 lines.

Step 9:
Pull the tip downwards by making an inside reverse
fold over these lines, valley-fold on the same place
as the line below at the layer on the backside.

Step 10:
Fold the tip in half, the black folding line shows where
to fold on the tip.

Step 11:
Valley-fold over this line, do the same on the other side,
see arrow.

DONE, cool formation flight!

This is a DIY video with folding instructions for the Rocket Plane: