How to Make an Origami Airplane

Making a Classic Origami Airplane

Find a rectangular piece of paper. If you plan on flying your plane indoors, lightweight paper such as printer paper is perfect. Heavier paper such as origami paper or cardstock (thicker paper) is preferred if you plan to fly your plane outside, especially on a windy day.

Fold the paper in half vertically. Crease and unfold. It is important to keep the creases sharp and surfaces smooth to decrease drag (resistance forces).

Fold the two top corners to the center crease. Do not unfold. At this point, your paper should form a "house" shape with a pointed roof and long straight sides.

Fold the same corners again so the edges meet the center line. Do not unfold. Your "house" should look like a "tent" with a long, steep pointed roof and short straight sides. Fold your "tent" in half vertically to make the body of the airplane. Your

Fold the top of the right and left sides down so they are aligned with the bottom of the body. At this point it is good to make sure your folds are symmetrical and your creases are sharp.

Finish the wings by lifting the right and left sides up. The tops of the wings should form a flat, triangle-shaped surface. The body should be triangle-shaped as well and extend below the wings in the center of your plane.

Enjoy your paper airplane. Once you've mastered the basic origami airplane, you can experiment with more advanced designs.

Making an Origami Jet

Start with a square piece of origami paper or printer paper. If you do not have a square piece of paper, you can make one by taking a rectangular sheet of paper

Make a horizontal valley fold. In origami,a valley fold is when you fold the paper in half so it forms a 'V'. Unfold the paper.

Fold the top and bottom sides into the center. There should be three horizontal creases that divide the paper into four equal sections.

Make a vertical valley fold.

Unfold the paper and then fold the right and left sides into the center crease. Unfold the paper and lay it flat on the table. At this point the creases should form 16 squares that run four-across and four-down.

Fold the paper in half diagonally. Unfold.

Fold the paper in half diagonally in the opposite direction. When you unfold your paper, the creases should form 16 equal-sized squares plus an 'X' that runs from the top-left to bottom-right corner, and top-right to bottom-left corner.

Rotate the square paper 45 degrees so it makes a diamond. Apply a vertical valley fold on the left corner of your diamond. Do not unfold. Your diamond should have three pointed and one flat corner.

Create a crease pattern. This pattern uses a series of valley and mountain folds along preexisting creases. Here is a diagram showing the location and type of folds. The opposite of a valley fold is a mountain fold, where the paper is folded to form an upside-down "V".

Fold the two sides together using a horizontal valley fold. At this point, your jet should resemble a "shoe" with a pointed toe. Next, fold the base (longest edge) up so it covers about 1/3rd of the "shoe".

Fold the top of the shoe out and over the line created by the previous fold. This section will eventually form the wings. Repeat fold on the opposite side.

Rotate the origami jet 90 degrees so you are facing the base. Spread the wings by gently pulling them out to the sides.

Launch your jet. Hold it near the nose so the plane is either perpendicular to the ground or the nose is pointed slightly up. Throw the plane overhanded using a fast, smooth motion. Compare the flight distance and speed of your origami jet to your origami plane.

Making an Origami Hang Glider

Tear out a page from a phone book or notebook. You want to use lightweight paper as you be surfing your glider on a wave of air rather than throwing it like an airplane.

Collect all additional materials. In addition to a piece of paper, you will need the following: Pair of scissors. Three metal twist ties Scotch tape Ruler Pen

Print out the template for your hang glider. Here is an example. Using scissors, cut one of the two large triangles along the outer black lines. Save the second triangle to give to a friend so they can make their own origami hang glider. Cut a small notch along the thick black lines at the base (longest side) of both triangles.

Tape the cut-out templates to your piece of paper. Make sure the template is flat against your paper and there are no wrinkles or folds. Use four pieces of tape to secure the template, one at each point and one in the center of the base of the triangle. Once the template is secured, cut around the outer edges of the triangle making sure it remains connected to the underlying paper.

Trace along the dotted lines with a pencil. The dotted lines indicate where you will fold the paper. They are separated into two categories and labeled on the pattern: There are three valley folds. One line runs parallel to the base, and the other two are located at each end of the first line. There are three mountain folds. One bisects the top edge of the triangle, and the other two run parallel to the sides of the triangle. Have the template facing you at all times so you can orient yourself according to these folds.

Use your fingers to pinch the mountain fold at the top of the triangle.

Place a ruler along the valley fold that runs parallel to the base. Fold the base inwards over the ruler. Gently unfold the paper so the fold remains loose.

Fold outwards along the two mountain folds that run parallel to the sides of the triangle. Start with one side and then do the other. Keep these folds loose for now. Once these have been folded outwards, pinch the mountain fold at the top of the triangle. Pinch along all three mountain lines, stopping at the end of the lines or where they intersect with a valley fold. Make sure the folds are crisp and symmetrical.

Bend the two shorter valley folds up until they are perpendicular with the body of the glider. This forms the vertical stabilizers at the back corners of you glider.

Pinch the ends of the wings. The ends of the wings can bend up or down. Both wings must be up to fly, otherwise the glider will nosedive when thrown.

Stabilize your glider by adding weight to the front. At this point, your glider is back heavy, which will cause it to roll back-over-front when thrown.

Use a twist tie to create a lever that extends out from the front of the glider. Cut out the square labeled 'Front Weight Stabilizer'. Use this to cut-out a square from the same piece of lightweight paper you used to build the glider. Cut away the plastic covering on the metal twist tie until it is just a thin, metal wire. You can do this by cutting along the wire and scrape-off any remaining covering with your fingernails. Place a small piece of tape (no more than 1/2 inch) on one end of the wire. Tape the wire to one of the corners of your paper square. Place the paper square on a thick book so the corner with the wire is at the edge of the book. The wire should extend out from the edge of the book and have no support. If the wire tips down, then it is too heavy. Use scissors to cut-off small pieces of the wire until it only slightly tips. If the wire is perfectly balanced, it might be too light. You can make it heavier by adding tiny pieces of tape to the end not attached to the paper.

Remove the wire from the paper square. You will need to attach the wire to the nose of the glider. Turn the glider over so the side with the template is facing down. Attach a small, square (ca. 1/2 inch) piece of tape to one end of the wire. Tape the wire so it exactly follows the fold that forms the nose of the glider. Attach it so the corners of the tape match-up exactly to the front edge. Turn the glider over and refold the front so the crease supports the wire. It is okay if there is a slight bend to either side of the fold. This gives the glider strength.

Flatten the folds if they are too tight. The curvature of the wings is known as camber, and influences lift in planes or gliders by forming the airfoil. Folds that are too tight create too much camber, and this destabilizes the plane. Place the plane in the cover of heavy book. Push the vertical stabilizers down so they are not damaged. Close the cover and press down for 5 to 10 seconds. This will improve the camber by creating a more gentle curvature.

Adjust the elevon and vertical stabilizers as needed. Place the plane on a flat surface and measure the angle between the surface and the back flap. If this angle is less than 20 degrees, increase the angle by bending it slightly forwards. Check that the angle on both ends is equal. Refold the vertical stabilizers so they form a 90 degree angle with the body of the glider. Separate the template from the paper if you haven't already. Bend the end of the wire up until it forms a small hook. Be careful not to tear the paper or disturb any of the folds. Use the wire hook to pick-up and carry your glider. Do not pick-up your glider from the back. This can damage the vertical stabilizers or the back flap of the glider, known as the elevon which is important for roll and pitch. Use scissors to cut along the curved line in the back, and cut-off the pointed tips of the stabilizers along the solid black line.

Launch your glider. Hold the glider in the center with you thumb and index finger. With the nose of the glider pointing slightly down, gently drop it. Walk behind your glider and gently wave a piece of cardboard that is at least 1.5 by 1.5 feet underneath it. This will help keep your glider in motion.

Finished! Enjoy your glider.