Balloon Car Challenge

Balloon Car Challenge


Kira Kira Flyers

 

This team’s balloon is powered by air coming out of a balloon attached to the front of the car.

The materials that they use to make this balloon car are four plastic bottle caps, two toothpicks, two balloons, three rubber bands, a thick straw, and two clothespins.

I explain how to make this balloon car.

First, we make holes in the plastic bottle caps large enough hold a toothpick.

Second, we glue the two plastic bottle caps and a two toothpick.

Therefore, we make another one of the same.

Third, we attach a balloon to a straw using a rubber band and make another one of the same.

Finally, we put them on top of the two things made of toothpicks and plastic bottle cap and glue them together.

After listening to this presentation, I think there are two problems in this balloon car design.

First, it is place balloons in front of the car. The reason I think it is problem is that if there is a in front of the car, it would get in the way when it moves.

Second, this design is not designed to use two balloons. When Mr. Jeffry asked them about it, the team’s members were in a hurry to think about it. Therefore, I think the outcome will be different from what they had envisioned.

I think that this team lacked an explanation of difficult points when they make this balloon car.

Therefore, they should have said difficult points when they make this balloon car.

 In addition, they should consider this design from multi perspective.

Finally, I think that would make this team’s presentation much better.

 

a)     Uniqueness of design (6)

I think this team’s design is simple. 

b)    Effectiveness of presentation (7)

I think that this team lacked an explanation of difficult points when they make this balloon car.

They should have said difficult points when they make this balloon car.

c)     Probability of success (5)

They should consider this design from multi perspective

 

Eigo Gachizei

 

This team’s balloon car is powered by air coming out of two balloons attached to the front of the car.

　　　 The materials they use in this balloon car are cardboard, Y-shaped straws, toothpicks, tape, rubber bands and plastic bottle caps.

They use the Y-shaped straw to let the air out of the two balloons.

I explain how to make this balloon car.

First, they make a hole in the center of a plastic bottle cap and stick a toothpick through the hole so that the groove of the toothpick fits through the hole.

Second, they make a hole in the cardboard large enough to fit a straw and attach a plastic bottle cap to the other end of the toothpick in the same way.

Third, they fix a straw to the end of the balloon and secure it to the cardboard and use a straw with two separate tips because we make the air in the two balloons continue to flow for as long as possible.

Finally, they tied around the plastic bottle caps to use rubber bands to prevent tires from spinning out of control.

 

There are three difficult points in this challenge.

The first point is to make a car with lightweight materials.

It’s because a car that weights less can move longer than a car that weights more.

The second point is to reduce air resistance.

The third point is to make the tires balanced and symmetrical to create a sturdy car.

 

Their presentation was easy for me to understand.

However, I think that some team members do not fully understand the content.

In conclusion, we think that if all members of the team fully understand this content, their presentation will be better.

 

                a) Uniqueness of design (7)

I think this team’s design is simple 

b) Effectiveness of presentation (7)

 I think that some team members do not fully understand the content.

In conclusion, I think that if all members of the team fully understand this content, their presentation will be better.

c) Probability of success (6)

Because this team has not tried it on a prototype.

 

No 1

 

This team’s balloon car differs from the others in that it uses paper cups for tires.

The materials they use in this balloon car are paper cups, balloons, a cardboard, two bearings, straws, bamboo skewers and tape.

I explain how to make this balloon car.

First, they cut two stacked cardboard boxes.

Second, they cut four stacked cardboard boxes into 2 cm by 2 cm pieces.

Third, we drill a hole in the middle of them.

Forth, they make four straws cut about 2-3 cm pieces.

Fifth, they prepare cardboard cut into 10 cm by 13 cm, four straws cut into 3 cm pieces, bearings, and glue and fix them because reducing friction resistance and without contact between the tires and the car body.

Sixth, they cut in the two cowl parts each for right and left.

Seventh, they cut a paper cup into three parts and make four pars.

Eighth, they make a hole in the middle of the part to be a tire.

Nineth, they align the hole in the cardboard cut into 2 cm by 2 cm pieces with hole in the bottom of a paper cup and tape them together.

Tenth, they combine the parts with bamboo skewers.

Eleventh, they attach two balloons to a straw with tape.

Twelfth, they attach it to the car body with tape.

 

There is a difficult point in this challenge.

It is that the balloon hit the tire and the car slow down.

They attach a cover on top of the tire to solve this problem.

 

Their presentation was easy for me to understand.

Also, I think this team’s car design is created with ideas from a variety of perspectives.

 

a) Uniqueness of design (9)

I think this team’s car design is created with ideas from a variety of perspectives.

b) Effectiveness of presentation (9)

Their presentation was easy for me to understand.

c) Probability of success (8)

Because this team has  tried it on a prototype.

 

 

No 3

 

This team’s balloon is powered by air coming out of a balloon attached to the center of the car.

The materials that they use to make this balloon car are balloons, cardboard, toothpicks, straws, and plastic bottle caps.

I explain how to make this balloon car.

First, they make a hole in the center of a plastic bottle cap and make another three of the same.

Third, they create two spaces in the gaps between the cardboard for the straw to pass through.

Second, they stick two toothpicks through them on one side.

Forth, they pass them through the cardboard that thread the straw.

Fifth, they stick them through them on the other side.

Sixth, they attach two balloons to a straw with tape.

Finally, they attach them on the main car body.

 

There are two difficult points in this challenge.

First, they make the balloon car with the simplest materials possible.

They make it using only what they have at home.

Second, they use two balloons to make the car move straight because it becomes to move the car in a straight line when two balloons are used.

 

Their presentation was concise.

However, there were parts of the presentation that were a little difficult to hear.

Therefore, I think it would be a better presentation if they speak more clearly.

 

a) Uniqueness of design (7)

I think this team’s design is simple. 

b) Effectiveness of presentation (7)

There were parts of the presentation that were a little difficult to hear.

Therefore, I think it would be a better presentation if they speak more clearly.

c) Probability of success (8)

 Because this team has not tried it on a prototype.

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