A paper plane that can't fly all the time

The paper planes that have been unable to fly are as follows:

1. Fold the origami in half along the longer center line, then open it, and then fold the corners on both sides inward to align it with the center line.

2. Turn the triangle down. Fold the upper two corners inward so that both sides are aligned with the center line.

3. Fold the extra small triangle upwards, fold the origami in half along the center line (one side of the two layers is outside), and then fold the wings on both sides in half.

Paper airplane (scientific name: autonomous aerodynamic physical model) is a toy airplane made of paper. The earliest paper plane can be traced back to the 1980s, and it was made in the west in 1909. It is the most common form of aviation origami and belongs to a branch of origami.

Related information:

Making toys out of paper is thought to have originated in Greece 2000 years ago, when "kite" was a popular entertainment. But this is not the same as a paper plane.

The earliest paper plane that can be traced back to the 1980s was made in the west in 1909. However, the most accepted production method was put forward by John K. Northrop (one of the founders of Lockheed) in 1930. Northrop Corporation made a simulation test with paper airplanes to discover the flight mechanism of real airplanes.