ONEday | International School of Beijing

Category: Car Racing (page 1 of 3)

Rollar coaster design

Goal: I want to build a fast and durable car. I will make a strong car by sticking the axle on the car. And I will make a car that has medium weight and small in size, so I will have a lot of gravitational energy and reduce the amount of friction

1st paragraph Design process and how you built your car

design process:

The car will be small and medium weight

I made a car that was made by plastic. It is kind of like an F1.

I added a few pieces of wood

I fixed it and added something new while taking out the water bottle

2nd paragraph problems and challenges

The car was too light and it can’t get over the ramp.

Because of the butterfly effect, how I can’t redo the exact run, this causes me to not be able to go over the ramp again

My car was destroyed

3rd paragraph how would you improve your design

I will add more weight since Ke=m x v squared/2

For this year’s OneDay, I decided to build a car that moves along the roller coaster track

(*Pictures and videos of cars are included on the bottom)

First, when I just started to build my Roller Coaster Car, I first thought that I should just build an ordinary race car just like ordinary cars people ride. However, because I had much time to try something new and creative, so I decided to make something unique and special.  But when I really got into the project, I mainly focused on the weight of the car (making it heavier) because  I knew that the heavier something is, the more energy it has.

After finish building prototype I, it worked out pretty well,  but it was not able to go over the small hill (Use video on the bottom as a reference) And then, my friend gave me idea, using water bottle, which will probably make car a lot heavier. So I just simply put the water bottle to the new main board and attached wheel and axels and tested it, just to observe what will happen.  That was a big success.  I was allowed to go over the small hill and climb about half the 2nd hill (which is pretty high), and go back again. I kept developing my car by stabilising the whole system, by making every parts stronger, etc.

_____Design notes_____

For the prototype I,  I used 16 by 35 (centimetres) plastic thing as a main board, and I used 4 big wheels and 2 long axels. And the total weight was about 480g. For my prototype II, I used the same thing as a main board, same wheels and axels, but the weight was over 600g since I added an additional thing to it, which was a water bottle.

There were many challenges and problems during this process of creating new car. The most annoying thing during this project was the axels. Those axels was keep falling off, which made wheels stuck, and which lastly made car stuck in the middle of the roller coaster track. I think this part was the weakest of all the parts because I wasn’t able to find a good way to stick the Axel onto the car’s main board. After building by simple and quick prototype 2, I was surprised because of the fact that the car took me one single minute to build a car was way better than the car took me 1 and a half hours to build. Later, I soon faced one more minor problem, was the track. Since the track had nothing that keep my car from falling off, so my car broke many times, which made me to repair my car over and over and over again, also the knots on the roller coaster rail was annoying because I had to change my design or else the car will going to stuck.

There are many elements that plays a huge role in judging whether the car would hit a big success or failure, such as aerodynamics, weight, friction and so. I personally think that being able to control, mainly reducing the dissipated energy as much as you can  is very important since making most energy and keeping it is the key for building the good roller coaster car.  Therefore, I think I should have made my car more streamlined, which will probably decrease the dissipated energy (wasted energy) and air friction. Also, I should have made my car’s front part heavier instead of making my car’s back part heavier.

I think in order to make a best car on thee roller coaster track, we should first consider about science, and we should try to bring science closer.

Prototype1                                                                        All the pictures of cars (prototype 1,2)

(PROTOTYPE 1)                                                             (LEFT AND RIGHT: PROTOTYPE 2)

Prototype 1 video: IMG_3997

Prototype 2 video–1 :IMG_4011

Prototype 2 video–2: IMG_4014

one day: Theo’s Racing car

Goal: The car goes to until end of the rail.

Challenge and Selection: First we joined in to the car racing project thing, and planning how do you make your own car. Second, make a little planning sheet, write which materials do you need. Take materials from materials store, and make your own car by following your planning sheet. When you finish to make the car, testing your car on the rail. If it was success you are taking photo of that racing car also you take the video. Leave evidences. If you fail, fix your car and try again.

The Design Process was not planned, I was scrolling through the internet, and came across the McLaren Honda MP4 image and thought that the MP4 looks cool, so I drew the chassis on the plastic board and trimmed the pieces out.

During the building, I had trouble making the chassis, the foam board was too weak and floppy, the hard plastic board was a bit too fragile since the board is hollow so I had to laser cut a piece of plastic and glue it to the center bottom of the chassis, then secure it with duct tape. Which resolved the problem I’m concerned.

Next time, I would attempt to make most of the parts by laser-cutting, or 3D printing. Since, then my parts would be more precise and it would make the balance, aerodynamics and look better.

We used the ISB design process to construct our car. The cars were mostly made out of wood and foam sided with wheels and bits of plastic. My car was mostly made out of bits of foam board. I started making the car by its base. I the base ended up to be a 15cm by 30cm piece of foam board with parts of the sides cut in order to fit the wheels. The car was built up from there layer by layer starting with the wheels then the sides and last the lid. The first prototype was then tested and later named design fail after it crashed into its death on its first trial run. Prototype 1 did not run strait, and it did not hold together during the crash. The prototype was then modified, first glued back together then had weight added to it. A big change that was made was that I took the tires of the wheels off. The second prototype ran much better, but it still did not run as well as I wanted it to.

The build and test were mostly fun without encountering much frustration along the way, but there were some minor problems. For instance, bits and pieces kept on falling off during the runs and the car did not always go straight.

If we were to do this project again I would not change much to my design. This project has been overall very fun. I hope that in later years they could keep this style of projects and there could be more of these days.

Kenneth ‘s Race car

Goal: My goal was to build a car that can go fast, and can make over the second hill.

Design process:

1. Design process and how you make the car.
•My prototype 1 didn’t work out very well it crash and I had to build another one, so my prototype 2 work out fine but sometime it crash, my prototype 3 was really bad because I only had 10 min to build it so I made a wood blank with wheel.

2. Problems or challenges you may face or faced.
•The problem that I face is that every time I run it, it crash and break so I start using metal to build my car.

3. How would you improve your design.
•If I could improve my design I would put some wood to make it heaver.

This year one day, we were given a task to build a mini car that would run down the roller-coaster track in ISB. There were 2 strands we will be assessed on, the aesthetics, and the function of it measured by whether it can go the the end of the track or not. I made cars for the function before in similar activities such as the pinewood derby so I chose the aesthetics strand today. My car is a model of the F1 race car, the base using the stronger hollow paper and the rest using foam boards. There are supporting structures on the inside to make sure it wouldn’t break in a crash. I used big wheels and long axle since it fitted the scale of the car more, also, it would reduce friction.

A challenge I faced was cutting the foam since sometimes it is hard to cut and it’s easy to break it especially cutting curves.

If I could motorize my car, I could have made it not only aesthetic but also being able to go up almost any hill and make it equally functional. However, time doesn’t allow me to do both.

One day project: Roller Coaster Car

Goal:

Pass the roller coaster track

Design process and how you built car:

I will build the car low so it decreases the resistance of the air. I will use heavy material to build the car because the gravity makes the heavy car go faster down the track.

Materials:

Axles and wheel:

Wood, paper and glass

Tools:

Cup knife, Scissors, hacksaw and cutting machine.

Final Car:

Challenge/Problem you may face:

It’s hard to glue the part of the car together so i use a hot glue. The car is too fat. It almost as fat as the track so I build a new thin car. My cars always turn over. I break a lot of part of the car but I don’t know that problem with my car. So I make a new car.

How could you improve your design:

I built a new, thin car and I stick a water bottle on the car so the car goes heavier and go faster down the track.

I don’t have time to test my new car so I don’t have the video.

My first design was trying to make a car that was thinner, so that way it can go faster. My first prototype fell, the wheels popped off with a chunk of the Styrofoam and the tip was squished. The car wasn’t usable anymore. Because my first prototype didn’t work, I made prototype 2 which worked a lot better. Prototype 2 was wider and less pointy. I also took the rubber part of the wheels off so there would be less friction and the car would go faster. Some problems I faced was the wheels breaking, and the car not being able to go over the hill. If the wheel broke, I would switch the broken wheel with a new wheel and I would push harder or change something that was holding the car back from going over the second hill. One was I can improve my design is by making it lighter and flatter. Having a lighter and flatter car will make the car go faster. Also I would take the rubber part off the wheels to decrease the friction. I chose this One Day project because I can design a car myself and adjust it so it will meet my goal. Something that went well was eventually, the car was able to go over the hill and meet my goal. Therefore, this One Day was a fun and interesting experience for me.

Prototype 1:

Prototype 1 was thinner and longer than prototype 2. One the first run, the car fell off the ramp and the tip was squished, and the wheels popped off. After some adjustments, prototype 2 still didn’t work and was time to make prototype 2.

Prototype 2:

Prototype 2 is wider and flatter. At the end, I took the rubber off the wheels so there would be less friction against the wheels and slow it down. The car was a lot more successful than prototype 1.

When I was hot glueing the straw onto the car, there was a hole in the straw and the hot glue reached the wheel axel which prevented the wheels from turning. I had to cut the wheels off and attach it again.

At the end, my car was able to go over the hump and I have reached my goal.