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1.1

Minor Versionm

by Procheta Mallik

Tools

    • Exercise caution when using scissor

    • Do not use darts on human beings as it hurts and may lead to injury.

  1. Take a paper of : 21 cm in length 7.5 cm in breadth
    • Take a paper of :

    • 21 cm in length

    • 7.5 cm in breadth

    • Make a cone by rolling the paper as shown in the figure.

    • The Cone should be pointed at one end.

    • Roll the cone as thin as possible

  2. Use a tape to secure the folding Reinforce the pointed end with tape to prevent it from becoming blunt on repeated usage
    • Use a tape to secure the folding

    • Reinforce the pointed end with tape to prevent it from becoming blunt on repeated usage

    • Use additional tapes if the cone is not stable

  3. Lower the pointed end of dart into the straw. Allow the dart to sink into the straw  on its own. Mark the excess part of the dart with a marker
    • Lower the pointed end of dart into the straw.

    • Allow the dart to sink into the straw on its own.

    • Mark the excess part of the dart with a marker

    • Cut out the excess part so that it fits perfectly inside the straw.

    • This cut ensures that the dart fits perfectly inside the straw and friction between the straw and dart is minimal.

  4. Put the dart into  straw by its pointed end. Straw loaded with the dart is shown in the figure.
    • Put the dart into straw by its pointed end.

    • Straw loaded with the dart is shown in the figure.

    • Note that the dart fits perfectly into straw without any effort

  5. Blow the straw hard from the dart end to see it in action. Have someone to hold a newspaper as a dart board and blow at it! Try blowing the straw from different angles and observe their projectiles.
    • Blow the straw hard from the dart end to see it in action.

    • Have someone to hold a newspaper as a dart board and blow at it!

    • Try blowing the straw from different angles and observe their projectiles.

    • Dart failed to launch due to stiff contact between straw and dart - Cut the dart to a proper length such that the resistance is minimal.

    • The dart launches at slow speed and falls off immediately - Make sure the cut you made is of perfect length such that there is no air gaps in between dart and straw.

    • The length of launcher, the straw must be 3 three times that of the length of dart so that efficient acceleration can occur.

    • Pointed end of the dart is so blunt such that it cannot pierce the newspaper

    • Make bigger darts and use a PVC pipe as "Launcher"

    • Make a Dart Board out of paper with proper score scaling and play games

    • Make another "Launcher" by cutting the straw to half its length and compare the dart speeds in both.

    • Experiment making Launcher/Dart pairs of different diameter and observe whether diameter makes any difference to the speeds at which the darts are delivered.

Finish Line

Kailash NR

Member since: 05/02/2017

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