The Mach 5 paper airplane is a high-performance glider designed by three Boeing engineers, named after the NASA X-43A hypersonic aircraft that flies at five times the speed of sound. The good news: you can fold your own version with a single sheet of standard 8.5 x 11 inch paper in about two minutes. Here’s exactly how to do it.
What You Need
One sheet of letter-size paper (8.5 x 11 inches). Printer paper works well. A flat, hard surface to fold on will help you get crisp creases, which matter more than you’d think for flight performance. A small piece of tape is optional but useful for one step later on.
Step-by-Step Folding Instructions
Create the Center Crease
Lay your paper on the table in portrait orientation (tall, not wide). Fold it in half lengthwise, bringing the left edge to meet the right edge. Press the crease firmly, then unfold the paper and lay it flat again. You should have a clear vertical crease running down the center. This line guides every fold that follows.
Fold the Top Corners to the Center
Take the top-left corner and fold it down to the center crease. Do the same with the top-right corner. The two folded edges should meet along the center line, forming a triangle at the top of your paper. Keep these folds as symmetrical as possible. Even small differences between the left and right side will affect how the plane flies.
Fold the Triangle Point Down
Take the pointed tip of the triangle you just made and fold it straight down. The plane performs best when this downward fold creates another clean triangle shape. The tip should point toward you. If your fold isn’t geometrically perfect, don’t worry. As long as the shape roughly resembles a triangle, it will fly.
Fold the New Corners to the Center
This step looks similar to what you did earlier, but with an important difference. Fold the top-left corner down toward the center crease, and repeat on the right side. This time, instead of having the folded edges fully meet along the center line, only bring the corner points to touch at the middle. You should see a small triangle peeking out from underneath where the two corners meet. Once you’re happy with the position, press both creases firmly.
Lock It With the Small Triangle
See that little triangle poking out below the two corners you just folded? Fold it upward so it overlaps the corners and holds them in place. Crease it tightly. This acts as a lock that keeps the nose of your airplane from unfolding during flight. If the triangle doesn’t grip well on its own, a small piece of tape across this fold does the job.
Fold the Body in Half
Flip the entire paper over so the folded side faces down. Now fold the plane in half along that original center crease, bringing one side up to meet the other. Fold it upward toward yourself. As you make this fold, keep an eye on those two corners tucked under the triangle lock. They can slip out if you’re not careful. You should now be holding something that looks like a folded wedge.
Create the First Wing
Set the plane down with the nose pointing to the left and the folded bottom edge facing you. Take the top layer and fold it down to create the first wing. The crease should run roughly 0.5 to 1 inch above the bottom edge of the plane. This leaves a narrow body along the bottom and a wide wing surface on top, which is what gives the Mach 5 its gliding ability.
Create the Second Wing
Flip the plane over so the nose now points to the right. Fold the second wing down to match the first one exactly. Symmetry here is critical. If one wing is even slightly larger or sits at a different angle than the other, the plane will bank or spiral instead of flying straight. Take a moment to hold the plane up and compare both wings before creasing.
Open the Wings and Finish
Unfold both wings so they extend outward, roughly perpendicular to the body. Your Mach 5 is now ready to fly. If you want extra stability, fold the outer tips of each wing upward about half an inch to create small vertical fins (called winglets). These reduce side-to-side wobble and help the plane track straight, especially on longer throws.
Why This Design Flies So Well
The Mach 5 gets its performance from how the folding stacks extra paper toward the front. All those layered folds at the nose shift the plane’s center of mass forward, which is the single most important factor in stable paper airplane flight. Research from New York University found that the center of mass needs to be in a “just right” position for a glider to fly well. Too far back and the plane pitches up, stalls, and tumbles. Too far forward and it nosedives.
The original Mach 5 design was created by Boeing engineers Dillon Ruble, Garrett Jensen, and Nathaniel Erickson, who drew inspiration from the NASA X-43A, a hypersonic test vehicle. Their version of the paper airplane went on to break a world distance record. The layered nose construction mimics what aerospace engineers call forward weighting, and the broad, flat wings take advantage of a property unique to thin, flat surfaces: the point where air pressure acts on the wing shifts automatically as the flight angle changes, which self-corrects the plane’s pitch and keeps it stable without any moving parts.
Tips for Better Throws
Hold the plane by its body (the narrow folded section along the bottom), not by the wings. Grip it between your thumb and index finger about one-third of the way back from the nose. For maximum distance, throw at a slight upward angle, around 10 to 15 degrees above horizontal, with a firm, smooth release. A hard, jerky throw actually hurts performance because it causes the wings to flex unevenly at launch.
If your plane consistently veers left or right, check that both wings are the same size and angle. You can make small adjustments by bending the trailing edge of a wing slightly up or down. Bending the back edge of the left wing up, for example, will nudge the plane to the right. These micro-adjustments are how the Boeing team fine-tuned their record-breaking throws, and a little trial and error goes a long way.
If the plane nosedives, try throwing it a bit more gently or angling your throw slightly more upward. If it pitches up and stalls, add a tiny bit of weight to the nose with a paper clip or an extra fold at the front. The difference between a 30-foot flight and a 60-foot flight often comes down to these small tweaks rather than throwing harder.