PT 2.0 - Mousetrap Planning

1.1    Roles & Timeline

Project Manager (IC of blog) Kottaimuthu Lakshaya
-       Responsible for all documentation and “care” of the mousetrap.
-       Ensures that all tasks are completed and documented on time.
-       Has final say on any issue that cannot be settled by consensus

Drivetrain Engineer (IC of data analysis) Noel Lim
-       Responsible for developing system to transfer energy from the “engine” to the wheels.
-       Ensures proper testing and documentation of all drivetrain components.

Wheel Engineer (IC of construction and testing) Johan Soo
-       responsible for wheel choice and design
-       sources materials for wheels
-       works with Drivetrain Engineer to determine wheel-to-axle ratio and attachment

Chassis Engineer (taken by the 3rd member if it is a 3-member team) Marcus Tay
-       responsible for the look and function of the body (chassis) of the car
-       sources all materials for the chassis
-       works with Drivetrain and Wheel Engineers to ensure function and look of wheels and drivetrain components

Timeline

Week/Date
What is done?
Remarks
 T1W8
All of us come up with a car design individually
Individual
 T1W9
 Meet Up to discuss about which design of the 3 car best fits our Engineering Goals. Finalise car design and decide on materials
Group
T1W10
Source for materials
Group
March Holidays
Meet Up to build the car together
Group
T2W1
Test the car and modify the car to ensure it runs a longer distance in a shorter time
Group
T2W2
Final Testing and Data Collection
Group
1.2   Engineering Goals & Brainstorming

Part 1:

Wheels: The wheels play in an important role in the movement of the car. The size of the wheel determines how much friction can be overcome to drive the car even further. 

Chassis: A more streamlined chassis means it could overcome more air resistance when in movement. 

Level Arms & String: The more thicker the string, the more tension can build up, hence, the level arm would not snap as quickly, so the car can travel further.

Axles: The thinner the axles, the less mass the car carries, the car can travel faster and further.

Position Of Mousetrap: The position of mousetrap should be in the middle of the chassis of the car. Since the weight is distributed evenly to the 4 wheels (Centre of Gravity), the car can travel further.

Part 2:

No.
3 Car Designs
1

2

3



1.3    Evaluation & Decision Matrices




Step 5: Analyse Results

a) The design alternative with the highest value (as shown in the "Totals" row) is the alternative that best meets the selected criteria. Design alternative with significantly lower values can be discarded. The design alternative with the highest score may be selected, or you can select the alternative that received the highest score for the majority of the catorgies.

b) Which is the design alternative with the highest value?
Design Number 3

c) Which idea will you proceed to design?
Design Number 3

1.4  Design Rationales for the Chosen Design

After completing the matrices in part 1.3, your group should have decided on ONE design. Next, you need to document clearly the design rationales for the chosen design with respect to the following 5 aspects:

Wheels: Wheels are positioned correctly, with weight equally distributed to all wheels. The size of wheels are big enough to overcome the frictional forces

Chassis: The chassis is slightly sloped to give it a streamlined body, therefore it can move overcome air resistance and move faster.

Lever arm & String type: Strings were taut enough to have tensional forces so that more force can be exerted upon releasing the lever arm.

Axles: The axles used were light, therefore it does not affect the car's weight as much, so that it can move for a longer period of time and further.

Positioning of mousetrap: The mousetrap was placed in the centre of the chassis of the car. The weight is distributed equally among the 4 wheels so that the car can move further. 






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