How to make an origami stealth aircraft (page 11)

 

19. Unfold two valley-folds of the step #18 a little that you have just applied.   Prepare to apply two valley-folds, two mountain-folds, and two flat-folds.

20. Start applying two valley-folds, two mountain-folds, and two flat-folds of the step #19.

 

 

 

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