1. Origami Book Pdf

Science Activity: Make a Mini-Helicopter From Paper! Exploratorium. print-out of the Roto-Copter pattern which you can click-on in Step 1. pencil. scissors. paper clips. crayons or markers.

newspaper. cereal bowl Print out the Roto-Copter pattern.

Click to go to pattern page. Cut along the solid lines only.

Fold on the dotted lines. Fold A toward you. Fold B away from you. Fold C and D over each other so they overlap. Fold the bottom up and put a paper clip on it.

Hold the Roto-Copter by the paper clip. Throw it like a baseball, as high and far as you can. It will spin to the floor. You can also stand on a chair or on the stairs and drop it.

How to make a Paper. Origami Kids. How to make a Paper Helicopter that Flies is it a. Continue reading → The post Paper Helicopter appeared first on.

Ask a grown-up if you can drop it out the window. If you want, you can use crayons or markers to color your Roto-Copter before you fold it. The colors will blur together when it spins. Make three Roto-Copters for each person. Use a marker to draw a 1-foot circle on a piece of newspaper. Put a cereal bowl in the middle of the circle. The circle is the target area and the bowl is the bull's-eye.

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Take turns standing on a chair at the edge of the newspaper and dropping your Roto-Copters. At the Exploratorium, we get 3 points for a bull's-eye, 2 points for a copter inside the circle, and one point for just hitting the newspaper-but you can make up any rules you want. Igor Sikorsky designed the first successful helicopter in the late 1930s. His inspiration came from drawings of an aircraft with a spinning wing, drawn by Leonardo da Vinci nearly five hundred years before.Lots of photographs and information about helicopters and the man who invented them.This online gallery displays images and other information related to Leonardo da Vinci. The ' of the gallery has images of helicopters and other flying machines. This and dozens of other cool activities are included in the Exploratorium's Science Explorer books, available for purchase from our. We would like to hear about your results and discoveries.

Please send an email message to. ©1997 Why does the Roto-Copter spin? When the Roto-Copter falls, air pushes up against the blades, bending them up just a little. When air pushes upward on the slanted blade, some of that thrust becomes a sideways, or horizontal, push. Why doesn't the copter simply move sideways through the air? That's because there are two blades, each getting the same push, but in opposite directions. The two opposing thrusts work together to cause the toy to spin.

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Next time you drop your copter, notice which direction it spins as it falls. Is it clockwise or counterclockwise? Now bend the blades in opposite directions-if blade A was bent toward you and blade B was bent away, bend B toward you and A away. Drop the copter again. Now which way does it spin? In the Spinning Blimp, air pushes up on the flat sides of the strip of paper.

When the flat side of the paper strip is parallel to the ground, the blimp drifts down like a flat piece of paper. But if the blimp tilts so that the flat side of the strip is at an angle to the ground, the paper strip gets a sideways push, just like the blade of the copter, sending the blimp spinning.

Each time the flat strip comes around, it gets another push and goes for another spin.

Key concepts Gravity Weight Lift Aerodynamics Introduction Have you ever seen a helicopter flying through the air? Have you ever wondered how they fly—or if you could try flying one yourself? This fun activity will help you get started at home building a simple paper helicopter. And you will learn a little bit about what keeps these amazing vehicles aloft. Background Helicopters stay in the air using spinning blades that are used to generate 'lift.' With enough of it, a craft can overcome the force of gravity, which pulls the object down toward Earth. Aircraft such as helicopters with spinning blades are called rotary wing, unlike traditional airplanes, which are fixed wing.

In this activity you will build a simple paper helicopter called a 'whirlybird.' Unlike a real helicopter, the whirlybird does not have a motor to make its blades spin. Due to its special shape, however, the blades will still spin as it falls. This generates additional lift that slows the whirlybird even as it drops. So, it will fall much slower than if you crumpled up the same piece of paper and dropped it. Do you think adding paper clips as weights to the whirlybird will make it fall faster?

Try this activity to find out! Materials. Computer with access to a printer to print the whirlybird template (If you do not have access to a printer, you can use a ruler and pencil to draw your own whirlybird template based on the online one.). Printer paper. Scissors. Several paper clips.

Stopwatch (optional). A safe, high place from which to drop the whirlybirds (You could have an adult stand on a chair or stepping stool, for example.) Preparation. Download and print the whirlybird template from this.

If you do not have access to a printer, you can download the file and open it on your computer, then use a pencil and ruler to draw the whirlybird shape on a piece of paper, based on the dimensions in the template. Follow the directions on the template to cut out and fold your whirlybird. Procedure. Now it's time to drop your whirlybird! What do you think will happen when it gets dropped?

Have an adult help drop it from a safe high place (such as standing on a chair or a stepping stool). How did the whirlybird fall?. Now drop the whirlybird a couple more times—in the same fashion, from the same height. Why do you think it is important to drop it more than once?. Now, attach a paper clip to the bottom part of the whirlybird and drop it again.

Do you think it will fall faster? Pay close attention. How did it fall with a paper clip attached?. Keep adding paper clips, one at a time, to your whirlybird and drop it after each new paper clip.

What do you observe as you add more and more paper clips?. You can also use a stopwatch to time how long it takes the whirlybird to fall with different numbers of paper clips on it. Write down the times to help you remember how fast it falls when you add different numbers of paper clips. Do you detect a pattern?. Extra: Try making whirlybirds from different types of paper, such as printer paper, construction paper and cardstock. Do the different types of paper fall at different speeds?. Extra: Try modifying the whirlybird template or making your own design.

For example, what happens if you make the 'wings' longer or shorter or narrower or wider? What if you make the edges of the wings wavy or zigzagged instead of straight?

What if you make the wings curved instead of rectangular? Try out a bunch of different ideas to see what happens. Then try to design your own whirlybird—one that falls as slowly as possible.

Observations and results When you drop a whirlybird, it will take a fraction of a second for it to start spinning and slow down. This is why you need to drop it from a high location—it still needs a certain amount of vertical space to begin its spinning. Once the whirlybird does start spinning, it should 'helicopter' slowly to the ground. As you add paper clips, the whirlybird should fall faster and faster until eventually it drops so fast that it does not spin at all. Experimenting with your own whirlybird designs can be a fun and challenging engineering activity. There might not be one single design for the 'best' whirlybird.

Some designs might fall more slowly than others. If you change the dimensions too dramatically, however, a whirlybird may actually become unstable and tumble to the ground instead of spinning. More to explore, from Science Buddies, from Decoded Science, from Scientific American, from Science Buddies This activity brought to you in partnership with ABOUT THE AUTHOR(S).