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Minor Versionm

by Procheta Mallik

Introduction

Using simple materials like cradboard, pencil, some pins and a straw, we construct models of an anemometer and a wind vane

    • Use the scissors with caution.

    • Be careful with the push pin - the sharp point may break skin.

    • Be cautious with the stapler.

    • ANEMOMETER

  1. Place the cardboard pieces as shown in the picture, like a cross Staple them together thus The blue tapes on the cardboard pieces are to stabilise any bends in the cardboard.
    • Place the cardboard pieces as shown in the picture, like a cross

    • Staple them together thus

    • The blue tapes on the cardboard pieces are to stabilise any bends in the cardboard.

  2. Cut 4 circles on the A4 sheets of paper. The radius of the circles will be equal to the height of the cone we want to make. Cut along the dotted lines as shown after making the circle.
    • Cut 4 circles on the A4 sheets of paper.

    • The radius of the circles will be equal to the height of the cone we want to make.

    • Cut along the dotted lines as shown after making the circle.

  3. After cutting out the little piece in the circle, follow the arrows in the picture to make a cone. Once the cone takes shape, hold it together with tape. Keep following the direction of the arrow (by placing one side of the paper on the other), until you can see a cone.
    • After cutting out the little piece in the circle, follow the arrows in the picture to make a cone.

    • Once the cone takes shape, hold it together with tape.

    • Keep following the direction of the arrow (by placing one side of the paper on the other), until you can see a cone.

  4. Attach one cone to one end of the cardboard cross with the help of a stapler. All the cones need to be below the cardboard  pieces and should be facing the same rotational direction, as shown. The direction of the cones must be followed as this will allow free motion in the wind.
    • Attach one cone to one end of the cardboard cross with the help of a stapler.

    • All the cones need to be below the cardboard pieces and should be facing the same rotational direction, as shown.

    • The direction of the cones must be followed as this will allow free motion in the wind.

    • You can also use tape to attach the cones to the cardboard instead of staple pins.

  5. Place the pencil rubber side up, at the intersection of the cardboard pieces on the lower side. Then pierce an all pin (push pin) through the same intersection from the top. The push pin will now go through the rubber part of the pencil, making a stand.
    • Place the pencil rubber side up, at the intersection of the cardboard pieces on the lower side.

    • Then pierce an all pin (push pin) through the same intersection from the top.

    • The push pin will now go through the rubber part of the pencil, making a stand.

    • You can pierce the pin first and then push the pencil rubber through it if it makes it easier.

    • Now take this anemometer into a windy place, and use it to test the speed of the wind!

    • Count the number of rotations the anemometer takes every 10 seconds!

    • WIND VANE

  6. Draw the figures as shown and cut out the pieces using scissors. The figures are approximately 5cm (2 inches) long. The figures are approximately 5cm (2 inches) long.
    • Draw the figures as shown and cut out the pieces using scissors.

    • The figures are approximately 5cm (2 inches) long.

  7. Make slits at the ends of the straw, as shown, on both sides. Insert the cutout figures into the slits, one on each side. Push the figure in until it sits snugly.
    • Make slits at the ends of the straw, as shown, on both sides.

    • Insert the cutout figures into the slits, one on each side.

    • Push the figure in until it sits snugly.

  8. After attaching the figures, push a bobby pin into the middle of the straw as shown. After attaching the figures, push a bobby pin into the middle of the straw as shown. After attaching the figures, push a bobby pin into the middle of the straw as shown.
    • After attaching the figures, push a bobby pin into the middle of the straw as shown.

  9. Cut out a circle with directions - North, South, East and West Place the pencil on top of it and test it.
    • Cut out a circle with directions - North, South, East and West

    • Place the pencil on top of it and test it.

    • Take this wind vane out into the garden and determine the direction of the wind blowing!

    • First make sure you place your direction circle in the correct orientation!

    • If the pin keeps falling off the pencil, just push it into another point in the eraser and make sure the hole is not too big.

    • If the cones are not aligned properly, remove them and stick them again.

    • If cones are not working as well as you'd like, you can replace them with paper cups!

    • What happens to the anemometer when you take it to a windy place?

    • What happens when you place it directly in front of the fan?

    • If you attached weights to the cones, what would happen?

    • Is there a difference if you use plastic cups instead of cones?

    • Do you think this would be a useful device to be warned about extreme conditions? (like at offshore places)

    • What is the use of the wind vane?

    • Does the wind vane keep changing direction?

Finish Line

Suchitha Vishwa

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