Introduction: Origami B2
"The Northrop Grumman B-2 Spirit, also known as the Stealth Bomber, is an American strategic bomber, featuring low observable stealth technology designed for penetrating dense anti-aircraft defenses; it is able to deploy both conventional and nuclear weapons. The bomber has a crew of two and can drop up to eighty 500 lb (230 kg)-class JDAM GPS-guided bombs, or sixteen 2,400 lb (1,100 kg) B83 nuclear bombs. The B-2 is the only aircraft that can carry large air-to-surface standoff weapons in a stealth configuration."
This won't do any of that. Then again, it doesn't cost $737M USD each.
In subsequent diagrams
- A red line is a mountain fold.
- A blue line is a valley fold.
- A black line is a crease - fold it as a mountain fold, then a valley fold, then unfold it.
Step 1: The Base, Part I
Unlike most origami, this model starts with a right triangle.
The blue line is the lead-in to the next step.
Step 2: The Base, Part II
The only reason the base is split into two steps is so the pictures don't get too confusing.
After Picture 2, unfold it, then repeat the folds on the other side.
When done, it should look like Picture 3.
Note that in Picture 3, the fold line is for three of the one-quarter sections.
Step 3: It Gets Interesting
In Picture 1, fold down on two of the one-quarter sections.
In Picture 3, separate the two halves and squash flat.
Step 4: Gusset the Wings
Rotate the model 180 degrees.
Lift up the wing and force the paper to unwrap from around itself.
Form it into gussets as shown.
Repeat for the other side.
Step 5: It Gets Very Interesting
Flip the model over.
In Picture 1, crease the square section horizontally, then fold back the right and left corners so the corners are along the crease and the vertical folds are where the underlying zig-zag fold starts.
In Picture 2, draw the right corner so the vertical crease is aligned with the vertical crease down the center of the square section. This will cause the paper to contort. Form a fold from where the vertical crease meets the diagonal edge to where it naturally lays on the paper.
In Picture 4, fold up on the newly-flattened section. This will again contort the paper. Here, fold the left edge of the paper vertical again to provide the required slack.
Picture 5 is the fold in mid-fold.
Picture 6 is the finished side.
Repeat for the other side.
Picture 7 is the finished product.
Step 6: Form the Center Sawtooth for the Tail
Unfold the two sawtooth halves.
Fold up the center section along the previously-formed crease.
Fold down the center section so its tip is in line with the two sawtooth sections.
Fold the two sawtooth sections back closed.
Step 7: Form the Wings
Picture 1: Fold back the tip slightly beyond the point where the crease crosses the one-quarter crease that runs parallel to the wing edge.
Picture 2: Angle the tip so its edge is horizontal.
Picture 3: Fold down the wing along the one-quarter crease.
Picture 4: Repeat for other wing. Not shown: folding the tip on the left-side wing.
Picture 5: Finished step.
Step 8: Form the Cockpit
Picture 1: From the previous step, fold the remaining tail down so the nose has a 90-degree point. Fold the top part of the nose to form the front of the cockpit.
Picture 2: Fold down the back of the tail to form the back of the cockpit.
Picture 3: Further fold down the back of the tail so it forms a narrow point.
Picture 4: The narrow point can be inserted under the pocket formed by zig-zagging the center sawtooth section.