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    Home » Primary Science » Key Stage 1 Science » How to make a Hovercraft

    How to make a Hovercraft

    January 14, 2014 By Emma Vanstone 12 Comments

    Building a mini hovercraft is a great way to learn about friction.

    Hovercrafts are really interesting as they move on top of a layer of air. The layer of air reduces friction allowing the hovercraft to move quickly over land and sea. We’ve been learning about friction recently, which is a complex topic to grasp, but a mini hovercraft made with a balloon and CD is a helpful demonstration.

    Hovercraft on the sea

    You’ll need

    • A CD you don’t need.
    • Hot/cold glue gun – ask an adult to help
    • A pop-up lid from a drinks bottle
    • Balloon

    How to make a mini hovercraft

    • Take the lid off the drinks bottle. Discard the plastic cover cap and ensure the pushdown mechanism is down.

    • Glue around the bottom rim of the pop-up lid and attach it to the centre of the CD over the hole in the middle. Make sure there are no holes for air to escape through.

    •  Push the pop-up lid down.

    • Blow up a balloon and place it over the pop-up lid. The balloon should stay inflated. Place the hovercraft on a smooth surface.

    • Lift up the lid and watch the hovercraft move!

    The hovercraft should shoot across the surface as the air is forced out the bottom.

    Mini hovercraft for a science project made from a balloon, pop up bottle top and CD

    Extension task

    Try the hovercraft on a rough surface, such as a carpet. What happens?

    What is Friction?

    Friction is created when two objects try to slide past each other. Friction can slow you down if you’re trying to move. Generally, the rougher the surface, the more friction there is. Real hovercrafts use a powerful fan to pump air underneath themselves. There’s less friction between the bottom of the hovercraft and air than there would be between the hovercraft and water. This allows hovercrafts to move very quickly.

    Our balloon hovercraft reduces friction between the CD and the surface by blowing air from the balloon between them.

    More friction experiments

    Race toy cars down ramps covered with different materials. The cars should move faster down the ramps that have smooth surfaces.

    Build and test mini garden zip lines for toys. A zip line made with a rough string should be slower than one made with a smooth string if all other conditions are the same.

    Last Updated on March 3, 2023 by Emma Vanstone

    « Simple Science – learning about forces
    Numeracy at Home Box »

    Safety Notice

    Science Sparks ( Wild Sparks Enterprises Ltd ) are not liable for the actions of activity of any person who uses the information in this resource or in any of the suggested further resources. Science Sparks assume no liability with regard to injuries or damage to property that may occur as a result of using the information and carrying out the practical activities contained in this resource or in any of the suggested further resources.

    These activities are designed to be carried out by children working with a parent, guardian or other appropriate adult. The adult involved is fully responsible for ensuring that the activities are carried out safely.

    Reader Interactions

    Comments

    1. Katie @ Gift of Curiosity

      January 15, 2014 at 5:18 pm

      Such a cool idea! We are totally going to do this! We are learning about states of matter and this is also another way to illustrate that gas is matter. Love it!

      Reply
      • hunter

        May 30, 2015 at 3:12 pm

        it is a great hover craft my class is doing it to

        Reply
        • Avant

          May 24, 2017 at 3:06 am

          But I’am doing one to.

          Reply
      • Avant

        May 24, 2017 at 3:03 am

        I do not think that is about states of matter to illustrate gas matter so you are wrong you ever you are

        Reply
        • Avant

          May 24, 2017 at 3:04 am

          I did not mean to do this so do it say anything.

          Reply
    2. WONDERTHRIFT

      January 19, 2014 at 9:19 am

      This is GENIUS! I will definitely try this out with Ramona. Thank you! X

      Reply
    3. courtney

      June 02, 2015 at 6:48 pm

      This is a good idea for a school project!

      Reply
    4. courtney

      June 08, 2015 at 1:30 pm

      I’m so confused, what is a pop up lid?????

      Reply

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