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Engineering project Blog post#3

Through the Engineering Project, I made 3 prototypes. From the 3 prototypes I built, I learned the cruciality on the planning step.

For the first class, I started making my first prototype, I used simple and cheap materials: paper, cardboard, foam, elastic band, and paperclip,  and PVS tube, simply just to test the measurements I decided on the blueprint. It didn’t work for the first few times, so I had to adjust the length of the handle. After spending the first class getting the right measurements, I worked on with better materials the next class for my 2nd prototype: Carboard wood, wood, elastic band, paperclip, and wood stick. I got the right measurements this time and the prototype worked out fine, so for the final product, without changing any measurements, I tried to make it look better. I spent my final 2 classes finding better materials, sanding the wood and simply make the product look better. I used the same measurements but this time the materials changed to wood, plastic jar, elastic band, wood stick, and wire. My mistake here is that I used wire instead of paperclip. The part I use paperclip is to stabilize and connect the elastic band and the wood platform, a wire is clearly not stronger than a paperclip, but I couldn’t find a paperclip at that time so I used wire instead. After finishing the product, I went on the testing. It worked for the first few tries but it snapped when I tried for the 5th time. The whole product collapsed and I didn’t have any time to put them back together.

For the project, I should’ve stick with materials that I have planned on the blueprint. Even though I changed some of the materials form the blueprint to make it look better, but I should have followed important materials that would stabilize the whole product. The feedback I got from peers are crucial in my design and I changed a lot by listening to peers. By listening to peers I changed materials such as foam to wood, which helped the carousel to speed at a steady pace.

(sorry the pictures are bad, I accidentally deleted the good pictures and videos I took)

Engineering Project Blog Post #2

After Define and Inquiring, I started to model and planning my project.

The picture below is my model of the product.

Since my Project is fairly easy to build, I will be spending my first 2 classes to build prototypes, and the final 2 classes to build my final product.

Engineering Project Blog Post #1

For the project, I decided that I would make a toy that transfers energy. After brainstorming some ideas I decided that I would focus on transferring elastic energy to kinetic energy, and the kinetic carousel is one of my ideas.

By twisting the elastic band it allows the carousel to spin which the elastic energy transfers to kinetic energy.

By making this carousel I will be needing:

Cardboard paper

elastic band

straw or stick

glue gun




The idea I first had is to create a slingshot, but since slingshots are considered weapon is not really likely to get approved, it inspired me to create something related to the transfer from elastic energy to kinetic. So I came across the Kinetic Carousel.


These are the link that will help me making my kinetic carousel.

DIY Engineering Toy: Kinetic Carousel


Band Goal 18-19 S1

My goal for the end of the semester is to improve on tonguing while maintain good tone.

The recording below is from Magnificent seven bar 30 to 45 and I feel like I need to work on the tonguing at this part more.

To improve tonguing I can practice tonguing quarter notes, eighth notes and sixteenth notes.

My Top 3

The Capstone Journey

Through the Capstone project, I gain a deeper understanding of the problems that China has right now. Air pollution is a struggle to many Chinese, as a result to all of the research and interview me and Sam made a documentary about how terrible the problem is right now and why it air pollution should gain attention. After the documentary, I gain knowledge why China is burning coal, why Air pollution is still happening and what can stop Air pollution. If I had the chance of doing the project again, I would try to interview more variety of people to support my idea even more. For the future 8th graders I want them to be aware that the more interview you get, the better it’s going to be.


The catapult project is a math project we are doing in Algebra 1 this year. We first build the catapult and then we used desmos to graph the arc of the catapult height vs time and height vs distance. By using the standard form we found the vertex and factored form.

Throughout the project, I have learned different things. I learned how to graph from just a video of the catapult and I have improved on turning forms into different forms and it also helped me to understand quadratic functions more.

There wasn’t really any challenges but for next time I think me and my partner need to make the catapult more stable, since every time the catapult shoots differently.

I think that the catapult project helped me a lot at understanding quadratic functions and I have learned a lot from this.

Height vs Distance Graph

Height vs Time Graph

Polymer Journal 4

My polymer project is a polymer that helps children bumping into tables and causing unwanted injuries. To make this polymer the first polymer I and my partner thought about was gloop. Gloop is bouncy which will decrease the force. We started out with gloop, it’s bouncy and it will decrease the force but it’s not sticky enough.

Our second prototype is the same as the first but with extra glue. We measured 0.4cm more glue, this prototype was a complete fail, although it was sticky, the polymer was so watery it loses the trait that we wanted, the bounciness. So for the last trail, we added less glue and I can’t say it was really successful, it was a bit better but it was still watery.

None of the prototypes were really successful, but the last prototype was the closest to success. The process was hard and challenging, we faced many challenges because we do not know the amount of glue we needed to put in.


The Right to Choose

24 constants, 12 districts, 1 winner, the rest will not survive. People were forced to compete in this game. The Hunger Games is a dystopian novel wrote by Susan Collins, and I think one of the themes of this dystopian novel hunger games is ‘everyone should have the right to do what they want, the Government should not control people.’


The Hunger Games society is a dystopian society. Every year at the reaping season the election starts. Every district is forced to send 2 volunteers to a game. The game is not an ordinary game, only 1 person can make it out alive, the game was created because in the past the districted rebelled against the capitol, to remind all 12 district that this must never be repeated. “To make it humiliating as well as torturous, the Capitol requires us to treat The Hunger Games as a festivity, a sporting event putting every district against each other.” (Collins, 19) The rules are very cruel and the whole game is only for entertainment. “The rules of The Hunger Games are simple. In punishment for the uprising, each of the twelve districts must provide one girl and one boy, called tributes, to participate.” (18) The girl and boy can’t decide if they want to go or not, they are forced. Therefore, I think that everybody should have the right to do things and that the government(Capitol) should not control or force people to participate.


I was never thrown into a game that will decide if you die or not, but I read a short story and it really connects to the theme.

The short story is about the Childhood of Sun Yat Sen, he goes to a school that doesn’t have any freedom to think, they don’t have any right to ask questions, all they were told is that the teacher is always right they can’t have their own choices. This connects to the theme of the story, you can as well say that they were living in dystopian kind of world, and I thought about the school life I live now, we are encouraged to ask questions and encouraged to think differently.


People should not be forced to do things. Everyone should have the right to choose what they want to do.

Polymer Journal 3

We are making a polymer that can stick to surfaces and will have enough bounce to decrease the force.


The traits we want the polymer to have are: bounciness, stickiness, some stretchiness, and some rubbery properties.


First, we will try to create a mixture of these properties using the guide given to us on the different materials. We will try to improve our prototype by changing the amounts of individual materials we incorporate into our polymer until the time runs out or until we end up with something satisfactory.


We’ll test our prototypes by evaluating its stickiness (on surfaces), its ability to hold together, and its bounciness. We will do this by sticking it to surfaces and applying forces to it at various strengths. This way, we can test the practicality of our polymer.

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