PT2.1 - Engineering Goals

PT2.1 - Engineering Goals

Engineering Goals
1. The standard issue mousetrap must be mounted on the vehicle chassis.

2. The spring on the mousetrap may not be cut, bent, over- wound, heat-treated or altered in any manner.

3. No additional source of elastic potential energy should be incorporated into the engine/ drivetrain mechanism.

4. An additional input of energy of any form to the vehicle is forbidden.

5. We may supply their own materials and are encouraged to use recycled, re-purposedmaterials; kits are prohibited.

6. Distance travelled will be measured in a straight line, with reference to the front axle of vehicle from start point to the point where the front axle stops or leaves the designated
testing area.

7. Vehicles must have either 3 or 4 wheels.

8. Engineering modifications such as gearing, use of lubricants, bushings and bearings are permitted.

9. The final assessment will consist of a maximum of 3 trial runs out of which the run with the best score will be recorded; the vehicle cannot be modified further once it has started on the first trial run and all 3 runs must be conducted within the same day.

Exception: Minor adjustments that are approved by the teacher assessor may be allowed on a case-by- case basis; all adjustments approved and carried out must be documented by the respective teams.

10. Standard issue mousetrap only used as the only energy source

11.  Physical dimensions not exceeding the following:
- Length = 30 cm max.
- Width = 15 cm max.
- Height = 15 cm max.

12. Must move off without any push/pull from the student.

Design Criterions

1)Size of wheels
We plan to have bigger wheels at the back of the mouse trap car and smaller wheels in front. This is so as more distance will be covered per revolution by a bigger wheel than a smaller wheel, therefore a bigger wheel will be able to cover more distance when the mouse trap is being released.

We tried to keep out mouse trap car as light-weight as possible as we trimmed off he sides and excess parts of the car to minimise the weight of the car. We also used CDs as wheels and lego parts as they are lighter than other parts made of metal or rubber.

We used CDs for the large back wheels, and smaller lego wheels for the from wheel, we also made use of lego parts which were lighter than parts that are made of metal. We also used lighter materials like chopsticks, plastic strings and light-weight ice cream sticks for the sides of the mouse trap car.

We kept our car to a size of:

Although our car is a 4 wheeled car, we tried our best to reduce the amount of friction between the wheels and the ground so that when the mouse trap have been released, the car will not abruptly come to a stop, but instead slowly slow down before stopping which will increase the distance covered by the car.

First Design (Ting Hao):

Second Design (Joshua):

Third Design (Thuta):

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