1. Planning


View the entire  “Deep Dive” episode by using the following links.
Please answer the following questions based on the videos and your understanding of the Engineering Design Process (EDP).

1. What was the problem the engineers at IDEO were asked to solve?
To take something old and familiar and completely redesign it in 5 days

2. Name two constraints that they had to deal with.
Time and materials

3. What were two of the major concerns/issues the teams discovered from their research?
Aren’t very safe for children and carts get stolen often

4. IDEO uses several methods, processes and ideas to generate alternative solutions.  What two principles or approaches appealed to you the most? Why?
1) Finding the main problems. With this method, IDEO are able to make designs that counter the root causes of the public’s frustration.
2) Brainstorming and sharing of ideas. People with different points of view share their versions of the answer, not only to give others their opinions but also help the others improve on their original ideas.

5. How were the possible solutions prototyped and tested?
They tested it against their main problem.

6. Was there a redesign step in the IDEO project? What was the final outcome?
Yes. They placed all their ideas together to form the final outcome.

1.2 Assignment of roles

Project Manager
- Zhen Yu
- Sean Lim
- Ming Hui

Drivetrain Engineer
- Sean Lim
- Ming Hui

Wheel Engineer
- Ming Hui

Chassis Engineer
- Zhen Yu
- Ming Hui

1.3 Brainstorming

Engineering Goals
Develop a MouseTrap Car with the following specifications:
  1. Uses only the MouseTrap provided as the only energy source
  2. Has a maximum length of 30 cm, width of 10 cm, and a height of 10 cm
  3. Can travel a minimum distance of 5 meters carrying an egg (the egg will be provided by the teacher)
  4. All time-lines have to be adhered  

LIST ANY KEY TERMS OR ISSUES THAT CAME UP DURING BRAINSTORMING.  This does not have to be neat or even organized. It gives you a way to keep track of any idea you may have had. Include separate notes, google sketches, etc. if you have them. (Attach separate sheets if needed)


1.5 Design rationale and notes

- Larger wheels = further distance per rotation of the axel
- Keep wheels at 90 degree angle (use spacers (also keeps wheels from rubbing against frame) on either sides of wheels to keep them at 90 degree angle), so that car runs straight & does not curve

Level arm
- Strong material

Chassis Material
- Rigid & strong to be able to support the mousetrap

Chassis Shape
- Aerodynamic, minimal air resistance
- Use squares to check angles (90 degrees)

Location of Mousetrap
- Back = more power
- Front = more distance

- Must be strong and light such that it can still grip onto the wheel while still not adding too much weight onto the car.
- Connects to wheels at center of wheel such that car does not wobble
- Larger axel = more rotation of outer wheel

String type and attachment
- Strong wire to connect the mousetrap to the back wheel.
- String material strong enough to hold tension exerted by mousetrap
- Create hook on level arm (String attachment)

1.6 Materials used

Where is it used?
Nylon fishing line, 1 roll
Strong, non-stretch, able to hold tension
Skewers, 4
Axel, car frame
Rod shape
Clothes hanger, 1
Level arm
Multiple large flattened metal paper clips, 6-8
Car frame support (chassis), Axel support
Rigid & strong
Cable ties, more than 5
Secure mousetrap to Chassis & level arm to spring arm
Secure, strong
Tapered cork with nail stuck onto it, 1
Middle of back axel
Gear ratio theory - string wounds & pulls from larger to smaller diameter
Rubberised wheel, 2
Back wheels
Creates enough friction to bring car forward
Plastic wheel, 2
Front wheels
Light, lesser friction produced as lesser contact with ground (hollow space in between the two protrusions)

1.7 Preliminary Sketch (Using Google Sketchup)

No comments:

Post a Comment