{ "text": "You can make a plane from paper. [IMAGE:File:Papierflieger -- 2021 -- 7
You can make a plane from paper. 
Fold the paper into a shape. Some look like a sharp triangle. 
Folding planes is a fun art. It is also a way to learn. You can see how things fly.
Some planes fly very far. Some fly for a long time. People even have contests for them.
Making a plane is a great way to play. It is both science and fun!
A paper plane is a toy aircraft. 

People have made paper planes since the mid-1800s. Folding them is both an art and a science. It helps students learn about flight. They can study lift, weight, drag, and thrust. These are the forces that make things fly.
Some people make very advanced planes. They use CAD software, which is a computer tool for design. In Japan, Professor Yasuaki Ninomiya made special planes called White Wings. 
In South Africa, Professor E.H. Mathews wrote books called Paper Pilot. His designs can fly very far. Some can even fly the length of a rugby pitch! He used a bungee system to launch them. This helps the planes fly over 120 meters. Paper planes bring people together through skill and play.
A paper plane is a wonderful toy aircraft that people love to make. 

To make a plane fly well, you must understand four main forces. These are lift, thrust, drag, and weight. By changing how you fold the paper, you can change how the plane moves. Some designs are built to fly a long distance. Others are made to stay in the air for a long time. Some are agile or can perform amazing stunts in the sky. Enthusiasts use different folding techniques to find the perfect balance.
People have been folding paper planes since at least the mid-19th century. One American children's book from 1864 describes how to build them. In 1924, a scientist named Ludwig Prandtl built a model at a large banquet. He even made one out of a paper menu during a dinner! It landed on a French Minister's shirt, which was quite embarrassing. Over the years, designs have improved in speed, style, and lift. 
Advanced designers use special tools to make better gliders. In Japan, Professor Yasuaki Ninomiya created the "White Wings" series. 
Paper planes connect simple play with high-level engineering. Some people even make paper helicopters, which are called autogyros. These have wings that spin in a circle as they fall. You can use a bungee cord to launch a paper plane very fast. One model called the U-2 flew over 120 meters using this method. Whether it is a simple fold or a complex model, paper planes show how much fun science can be.
A paper plane is a toy aircraft often used as a glider. 
To understand flight, one must study four fundamental forces. These forces are lift, thrust, drag, and weight. Enthusiasts manipulate these forces through different folding techniques. By changing the design, they control flight characteristics. Some planes are built for distance or stability. Others are designed for agility or aerobatics. Some models focus on time aloft, or how long they stay in the air. Designers must balance these forces to achieve their specific goals.
Paper planes have a long history. An American children's book from 1864 describes their construction. In 1924, the scientist Ludwig Prandtl built a model at a banquet. He once used a paper menu to make a model. It landed on a French Minister of Education's shirt. This caused embarrassment for his companions. Since then, designs have improved in velocity, lift, and propulsion. Modern paper models have reached high levels of sophistication. They have moved far beyond their simple origami origins.
Advanced gliders use many different development methods. Between 1930 and 1988, designers focused on high performance and scale modeling. Some even used CAD software, which is computer-aided design. Modern origami gliders use more intricate folds. Some designs use kirigami, which means cutting the paper. Designers also add ballast to ensure the plane flies correctly. While paper has higher drag than balsa wood, it has a higher strength-to-thickness ratio. This allows for unique structural possibilities.
In Japan, Professor Yasuaki Ninomiya developed advanced aircraft. 
In South Africa, Professor E.H. Mathews created the Paper Pilot series. He published his first book in 1984. He used a small wind tunnel to optimize his designs. His models used AutoCAD R12, a very advanced computer design tool. These gliders use a curved-plate aerofoil shape for better performance. Some models include a bungee hook for launching. This system is similar to how real sailplanes are launched. A scale model U-2 flew over 120 meters using a bungee launch. Some of his gliders can even fly the length of a rugby pitch.
There are also unique types like paper autogyros. An autogyro is an engineless helicopter.
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