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Grade 9 Engineering Reflect & Share

Which success criteria do you think was hardest to achieve and why?

Making the guillotine was easy, but making one that looked nice was quite challenging. Connecting parts with wood glue made the joints extremely strong, but it will also take a long time to glue. Super glue is easy to use but makes it hard to make changes later. Hot glue is the most effective, but it looks messy. Since we were running out of time when we started assembling the guillotine, we used hot glue for assembling as it was the most effective.

What was your 2nd and 3rd best idea, and after completing the project, do you think either of those ideas would have worked better than your current idea?

My 2nd and 3rd best idea after completing the guillotine was making a miniature helicopter and a small foam motor boat. With the guillotine, we had to work with wood, meaning we had to be accurate and careful when we made our own parts for the guillotine. However, with the helicopter and the motorboat, there are already pre-made parts for the motors and propellers, so we could handle the building process easier. This means we won’t have to rush doing the project and could spend some time improving the looks of the project.

What safety considerations were you reminded of while manufacturing your product?

We had to be careful with all the machines in the lab and wear safety goggles when using any device. We had to hold saws in a specific way when walking with them so we wouldn’t hurt others.

If you had an additional teammate, what aspect of the project would you have assigned them to make your final product better?

If our group had an additional teammate, we would make our guillotine bigger. However, having more people would not be better because more people could lead to more controversial decisions.

If I had another chance to do this project, I would not make a guillotine because there are small parts that makes it complicated to make(our group wasted too much time trying to make the support parts, especially the side support). I would make something like a  foam motorboat or a miniature helicopter for this project because they would be easier to make.

I would say that my project this time is a fail. Out of the three success criteria, we have only been able to achieve one of them. We were able to make the guillotine function, but the blade’s cut was not as smooth as we wanted it to be. Even though the project was a fail for me, I learned a lot of woodworking skills during the two weeks.

Grade 9 Engineering Project-Define & Inquire

Introduction:

In this project, we will design and make a device that shows energy transfer in two weeks.

Ideas:

Idea 1:

How to make RC Helicopter at home | 100% flying - YouTube

My first idea was a small DIY helicopter that is controllable.  I have always loved to make flying objects, and a controllable one makes things even better. This helicopter transfer energy from potential chemical energy (battery) to kinetic energy (moving and flying). Getting the materials and controlling the helicopter (shifting the propellers for different situations, such as levitating or flying up/down) could be Obstacles I encounter with this idea.

Interest Level: 5/5

Safety Level: 3/5

 

Idea 2:

How to make a DC motor Paddle Boat | Easy DIY Toy Boat - YouTube

After deciding that a helicopter was too hard for me, motorboats came to my mind since it was easier to make. This is similar to the helicopter as it also transfers potential chemical energy to kinetic energy. This idea is much easier to make than the helicopter because I can control it with sails or change how the paddle rotates when it needs to turn around.

Interest Level: 3/5

Safety Level: 4/5

 

Idea 3:

Small Spark Gap Tesla Coil

I have always wanted a Tesla Coil, and I found that I could use this Engineering project as a chance to make one myself. The Tesla coil can transfer the potential chemical energy in a battery to electrical energy and send them into the air. The downside of this idea is that the coil is hard to make, especially getting specific materials.

Interest Level: 4/5

Safety Level: 3/5

 

Idea 4:

Amazon.com: YAQUMW The Mini Counterweight Trebuchet Europe Medieval Siege Equipment Chariot Catapult Weapons DIY 3D Wooden Puzzles Model Kits for Adults STEM Projects Tabletop Toy Birthday Gift : Toys & Games

The ideas before were all electrical and “high-tech”, so I wanted to go with something more historical and “old-fashioned” for my other ideas. The trebuchet uses gravitational force and transfers stored/potential energy to kinetic energy. If done well, this idea would be challenging to make but doable in two weeks.

Interest Level: 4/5

Safety Level: 3/5

 

Idea 5:

 

1792 guillotine explained

The previous idea was a little dangerous, this inspired me to come up with some “old-fashioned entertainment”, and the first thing that came to my mind was a guillotine. The guillotine also uses gravitational force and transfers energy to kinetic energy. The difficulty of making a guillotine a similar to a trebuchet but slightly safer.

Interest Level: 4/5

Safety Level: 4/5

Design Project-The Sauce Adjusting Plate Prototype

-My biggest obstacle was that my parents thought that my unfinished cardboard prototype was trash I left in my room, so they threw it away along with all the other pieces of cardboard I collected.

-My biggest success was remaking my prototype with all the material I had left (3 pieces of A4 paper and a roll of tape). A challenge I had when remaking it with paper was that the paper was too soft making it hard to control. I was able to overcome this challenge by folding the piece of paper several times so it has the same thickness as cardboard.

-Overall, I don’t think my prototype was a success because it did not turn out as well as I planed, my prototype was completely different from my sketch and lastly, my prototype is falling apart, something breaks every time i move around my prototype.

Hugo’s Mid-Century Modern Speaker

Struggles When Making This Speaker:

Something I struggled with when I made this speaker was that I had to change designs midway. In my first design, I had to glue the bottom of the speaker to the top of my box which could effect the sound, therefore I had to change designs.

If I Could Redesign My Speaker, What Would I Do:

If I could remake my speaker, I would change the place I put the chip. With my current speaker, plugging it in would take some time.

The Most Important Decision I Made When Designing My Speaker:

Redesigning, deciding to start over when everyone was done with cardboard and starting to use wood, I had to start over from designing a box. luckily, all I had to change was the insides so i was able to catch up after a few classes.

What Am I Proud Of About This Speaker:

I am proud of designing the plastic that protects the buttons which makes the outside of my speaker water/spray proof and the easy access to buttons even with the plastic cover.

Hugos Wallet (Faux Leather Challenge )

My wallet solves my problems because it can hold both cards and cash at the same time.

I think the most important design on my wallet is the snap on leather and pocket on right.

If I could redo my wallet, I will make it longer, sew in straight line, cut in. straighter and use more leather.

A skill I learned was how to use a sewing machine and how to put snaps on leather.

Something I struggled with was sewing in a straight line, so i wont waist too much leather.

My Problem

My ID card holder has a problem, it cracked in the middle so my ID card may falls out when I move. I think I am going to make an ID card holder or a wallet.

Hugo’s Smell Detector

I created a cardboard prototype of a watch that detects smell. The watch detects smell by pressing the button on the side, air with smell will go inside the watch, then the name of the smell will appear on the screen of the watch. Picture 2 shows a rubber band so we can wear the watch easily. This watch was inspired by the people that sat around me.

LightBox

This year in product design, I was challenged to make a Lightbox that shows a place special to us. I chose Hong Kong, I was not able to travel anywhere this year because of COVID. i learned lots of different skills this year is product design. we learned how to use adobe illustrator to create the shape we wanted to make our light box, learn to use wood glue to join pieces of wood to make our box and learned to use masking tape to paint our pieces. if i could do my light box again i might make my boat a little bit smaller, add more color, paint more carefully and try to hide the LEDs better.

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