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Sonic Jet Paper Airplane

Fold a narrow point, return the nose on the reverse face, then open two small cockpit flaps above swept wings. This Sonic Jet uses one uncut Letter sheet.

Preparation + 27 numbered steps

Materials

US Letter, portrait · 8.5 × 11 inches

One flexible 8½ × 11-inch Letter sheet, a ruler and pencil for the wing-root marks. This guide uses an untaped finish with straight trailing edges. Use Letter for these measurements.

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Read all illustrated steps ↓Download PDF ↓ · one-page illustrated guide
Sonic Jet paper airplane with a pointed returned nose, paired cockpit flaps and swept wings
A pointed paper jet with paired cockpit flaps

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Preparation

The interactive guide needs JavaScript. Read every illustrated step below.

Camera only; does not change the fold.
Help · controls & diagram

Play or drag the progress slider to watch a fold from 0% to 100%. Use the view buttons or drag the diagram to look from another angle.

Blue and gold track the original left and right halves. Dark shades show reverse faces. Orange marks moving packets and hinges. Internal panel edges are material history, not additional folds.

With the diagram focused: Space plays or pauses, ←/→ change steps, and Home resets.

Every step, at a glance

Compare your paper with each diagram after completing the action. Blue and gold track the original left and right halves. Dark shades show reverse faces. Orange marks moving packets and hinges. Internal panel edges are material history, not additional folds.

  1. 0. Prepare a Letter sheet
  2. 1. Crease the lengthwise center
  3. 2. Open the center crease
  4. 3. Crease across the middle
  5. 4. Open the transverse guide
  6. 5. Bring in the left corner
  7. 6. Bring in the right corner
  8. 7. Narrow the left side
  9. 8. Narrow the right side
  10. 9. Turn to the plain face
  11. 10. Bring the point to the bottom
  12. 11. Turn back to the flaps
  13. 12. Fold the left shoulder in
  14. 13. Fold the right shoulder in
  15. 14. Expose the downward point
  16. 15. Return the nose upward
  17. 16. Turn to the cockpit flaps
  18. 17. Open the left cockpit flap
  19. 18. Open the right cockpit flap
  20. 19. Close the center body
  21. 20. Fold the first wing
  22. 21. Turn for the second wing
  23. 22. Match the second wing
  24. 23. Return to the first side
  25. 24. Open the first wing
  26. 25. Open the second wing
  27. 26. Hold the body underneath
  28. 27. Check the Sonic Jet
  1. END STATEOriginal left: blue · right: gold

    PREPARATION · Sonic Jet · Letter version

    Prepare a Letter sheet

    Place a short edge at the top. This end will become the pointed nose.

    Layers: One whole portrait Letter sheet.

    Check: The rectangle is 8½ inches wide and 11 inches tall.

    Explore this step ↑
  2. END STATEOriginal left: blue · right: gold

    STEP 1 · Sonic Jet · Letter version

    Crease the lengthwise center

    Bring the left long edge onto the right long edge and press the fold.

    Layers: The entire left half moves.

    Check: Both long edges match.

    Explore this step ↑
  3. END STATEOriginal left: blue · right: gold

    STEP 2 · Sonic Jet · Letter version

    Open the center crease

    Unfold completely and lay the sheet flat.

    Layers: Return the same half to the table.

    Check: The center guide runs from top to bottom.

    Explore this step ↑
  4. END STATEOriginal left: blue · right: gold

    STEP 3 · Sonic Jet · Letter version

    Crease across the middle

    Bring the top short edge onto the bottom short edge.

    Layers: Move the whole upper half.

    Check: The short edges match.

    Explore this step ↑
  5. END STATEOriginal left: blue · right: gold

    STEP 4 · Sonic Jet · Letter version

    Open the transverse guide

    Unfold fully again. Keep the original top edge at the top.

    Layers: Return the upper half.

    Check: Two perpendicular guides cross at the sheet center.

    Explore this step ↑
  6. END STATEOriginal left: blue · right: gold

    STEP 5 · Sonic Jet · Letter version

    Bring in the left corner

    Fold the upper-left corner inward so its top edge lies along the vertical center guide.

    Layers: Move the single upper-left triangular corner.

    Check: The corner lands 4¼ inches below the original top midpoint.

    Explore this step ↑
  7. END STATEOriginal left: blue · right: gold

    STEP 6 · Sonic Jet · Letter version

    Bring in the right corner

    Repeat on the upper-right corner, leaving the left triangle closed.

    Layers: Move only the right corner.

    Check: The two top edges meet at the center.

    Explore this step ↑
  8. END STATEOriginal left: blue · right: gold

    STEP 7 · Sonic Jet · Letter version

    Narrow the left side

    Bring the left sloping edge onto the centerline, keeping the top point fixed.

    Layers: Carry both layers of the left edge packet.

    Check: A longer, narrower left triangle lies against the center.

    Explore this step ↑
  9. END STATEOriginal left: blue · right: gold

    STEP 8 · Sonic Jet · Letter version

    Narrow the right side

    Bring the right sloping edge onto the centerline to match.

    Layers: Carry the complete right edge packet.

    Check: The two long flaps meet below a sharp top point.

    Explore this step ↑
  10. END STATEOriginal left: blue · right: gold

    STEP 9 · Sonic Jet · Letter version

    Turn to the plain face

    Turn the whole sheet over without changing which end is the nose.

    Layers: All layers turn together.

    Check: The long flaps are underneath.

    Explore this step ↑
  11. END STATEOriginal left: blue · right: gold

    STEP 10 · Sonic Jet · Letter version

    Bring the point to the bottom

    Fold the entire upper packet down along the transverse center guide. Land the top point at the bottom-edge midpoint.

    Layers: Carry every layer above the horizontal guide.

    Check: The point reaches the bottom edge; the top becomes a short horizontal fold.

    Explore this step ↑
  12. END STATEOriginal left: blue · right: gold

    STEP 11 · Sonic Jet · Letter version

    Turn back to the flaps

    Turn the entire packet over again, keeping the short folded edge at the top.

    Layers: Keep the downward nose folded.

    Check: The long folded edges face you again.

    Explore this step ↑
  13. END STATEOriginal left: blue · right: gold

    STEP 12 · Sonic Jet · Letter version

    Fold the left shoulder in

    Bring the left end of the short top edge down onto the centerline. The crease runs diagonally from the top midpoint.

    Layers: Move the complete shoulder packet, including its hidden nose layers.

    Check: The left half of the short top edge lies on the centerline.

    Explore this step ↑
  14. END STATEOriginal left: blue · right: gold

    STEP 13 · Sonic Jet · Letter version

    Fold the right shoulder in

    Match the other shoulder, bringing the right half of the short top edge onto the centerline.

    Layers: Move all layers of this shoulder, keeping the first closed.

    Check: Two shoulder packets meet along the center.

    Explore this step ↑
  15. END STATEOriginal left: blue · right: gold

    STEP 14 · Sonic Jet · Letter version

    Expose the downward point

    Turn the whole packet over so the downward-pointing triangle faces you.

    Layers: Move the entire sheet without unfolding.

    Check: The narrow point is on top of the broad backing.

    Explore this step ↑
  16. END STATEOriginal left: blue · right: gold

    STEP 15 · Sonic Jet · Letter version

    Return the nose upward

    Find the two places where the sides of the narrow triangle meet the diagonal shoulder edges. Join them with a horizontal crease and raise the free point. This hinge is about 1.61 inches below the transverse guide.

    Layers: Move only the free nose packet below these intersections; keep the broad backing and shoulders still.

    Check: The point projects beyond the shoulders, forming a long nose.

    Explore this step ↑
  17. END STATEOriginal left: blue · right: gold

    STEP 16 · Sonic Jet · Letter version

    Turn to the cockpit flaps

    Turn the packet over once more, keeping the nose pointed upward.

    Layers: All layers turn together.

    Check: Two small inner flap edges meet below the nose.

    Explore this step ↑
  18. END STATEOriginal left: blue · right: gold

    STEP 17 · Sonic Jet · Letter version

    Open the left cockpit flap

    Fold the left inner flap outward. Bring its vertical inner edge onto the diagonal shoulder edge on the left; start the new crease at their common upper point.

    Layers: Move the inner portion of the left shoulder packet, including its folded layers. Leave the backing and returned nose still.

    Check: The inner edge now follows the diagonal and a small triangular flap points left.

    Explore this step ↑
  19. END STATEOriginal left: blue · right: gold

    STEP 18 · Sonic Jet · Letter version

    Open the right cockpit flap

    Repeat the same edge-to-edge fold on the right.

    Layers: Move only the corresponding right shoulder packet.

    Check: The two outward flaps match beside the centerline.

    Explore this step ↑
  20. END STATEOriginal left: blue · right: gold

    STEP 19 · Sonic Jet · Letter version

    Close the center body

    Fold the original left half toward you over the right half along the lengthwise center crease.

    Layers: Carry the whole half, including its nose and cockpit layers.

    Check: Both outlines match, with the cockpit flaps inside the closed halves.

    Explore this step ↑
  21. END STATEOriginal left: blue · right: goldTAIL: 1 in FROM CENTERFOLD

    STEP 20 · Sonic Jet · Letter version

    Fold the first wing

    At the tail, mark 1 inch from the centerfold. Join this mark to the nose with a crease and fold the outside wing away from the other half.

    Layers: Move every layer outboard of the root, leaving a narrow wedge of body.

    Check: The root starts at the nose and leaves a 1-inch body depth at the tail.

    Explore this step ↑
  22. END STATEOriginal left: blue · right: gold

    STEP 21 · Sonic Jet · Letter version

    Turn for the second wing

    Turn the whole folded plane over to expose the second wing.

    Layers: Keep the first wing folded.

    Check: The second side faces you.

    Explore this step ↑
  23. END STATEOriginal left: blue · right: goldTAIL: 1 in FROM CENTERFOLD

    STEP 22 · Sonic Jet · Letter version

    Match the second wing

    Use the same nose-to-tail line on this side. Fold the second wing away from the first.

    Layers: Move the second complete wing packet only.

    Check: Both wing roots and tail marks match.

    Explore this step ↑
  24. END STATEOriginal left: blue · right: gold

    STEP 23 · Sonic Jet · Letter version

    Return to the first side

    Turn the whole folded airplane back before opening its wings.

    Layers: Keep both root folds closed.

    Check: The first folded wing faces you again.

    Explore this step ↑
  25. END STATEOriginal left: blue · right: gold

    STEP 24 · Sonic Jet · Letter version

    Open the first wing

    Hold the body closed and lift the first wing 90° away from its flat folded position.

    Layers: Open the same complete wing packet along its root.

    Check: The first wing stands at a right angle to the body.

    Explore this step ↑
  26. END STATEOriginal left: blue · right: gold

    STEP 25 · Sonic Jet · Letter version

    Open the second wing

    Lift the other wing by the same amount to the opposite side.

    Layers: Keep the center body closed.

    Check: Both wings extend away from the body.

    Explore this step ↑
  27. END STATEOriginal left: blue · right: gold

    STEP 26 · Sonic Jet · Letter version

    Hold the body underneath

    Rotate the entire airplane to put its narrow body below the wings. This is handling, not a new fold.

    Layers: Move the whole connected sheet.

    Check: The pointed nose leads the two swept wings and small cockpit flaps.

    Explore this step ↑
  28. END STATEOriginal left: blue · right: gold

    STEP 27 · Sonic Jet · Letter version

    Check the Sonic Jet

    Compare the wing roots and cockpit flaps on both sides. Keep the trailing edges straight for this untaped version.

    Layers: One sheet forms the nose, cockpit flaps, wings and body.

    Check: The construction is complete; flight performance has not been tested.

    Explore this step ↑
Sources & notes

Fold’N Fly (construction reference; model designer unestablished), Sonic Jet (undefined).

Sonic Jet photographed sequence ↗ · Sonic Jet video instructions ↗

Model designer and design-reuse license have not been established. This is not labeled traditional or public domain. Reference text, photographs and video have separate rights. These English instructions, geometric diagrams and code are independently authored with AI assistance; reference media and templates are not reproduced.

Adaptation: The reference accepts Letter and A4; these diagrams use Letter only. Paired folds, reopening and whole-packet turns are separated into teaching stages. The returned nose hinge joins the two shoulder intersections, about 1.61 inches below the transverse center guide. The cockpit folds bisect the angle between each inner vertical flap edge and its diagonal shoulder edge. These geometric landmarks make the photographed alignments explicit. The source gives no wing-root measurement: we use an authored line from the nose to a mark 1 inch from the centerfold at the tail, then open each wing 90° from its flat folded position. Optional source tape, drawn pilot and trailing-edge curl are omitted from this untaped, undecorated version. The name does not imply a speed or flight-performance claim.

Original instructions and diagrams, made with AI assistance. About & reuse

Accuracy notes

Real-paper follow-along and paper weight have not been tested. Diagrams illustrate the sequence, not paper thickness, contact, collisions or exact layer visibility.