c)+Revised+Design+–+Presentation+and+Documentation


 * Prototype Video**

media type="youtube" key="gAGXEVcW6_Q" height="385" width="480"


 * Physical Prototype**

Tim Hortons Iced Cappuccino cup


 * Powerpoint Slides**



Before the invention of the washing machine, ancient people used to wash their clothing by hitting them on rocks and rubbing them with sand to wipe away the dirt in rivers or streams (Home Furnish 2010). In China, some people discovered that grinded soap leaves can also be used for washing clothing.

The idea of the scrubbing board was to scrub the clothing on the board’s rough surface to remove the dirt. This ancient invention became our inspiration as our laundry drum’s inner surface will simulate the surface of a scrubbing board. So when the laundry drum rotates, the clothing inside the drum will hit and rub the inside surface.



The Q Drum weighs 54.5kg when filled; placing a burden on its young (children) and older users (elders) (Q Drum Ltd 2008). Therefore, there will be an installation of ball bearings on the two inner sides of the drum. The ball bearings function by maintaining axis movement, reducing the rotational friction, ultimately lessening the weight of the drum for a smoother spin (Wikipedia, 2010).

The ball bearings have to be made of metal since the trolley is quite heavy; metal may lengthen the lifespan of it. On average, a ball bearing’s lifespan is about 1 million rotations (Wikipedia, 2010). Ball bearings are also inexpensive and users can replace a new one when needed.



Works Cited

HOME FURNISH (2010). //History of Washing Machines//. Online at: < [] >, consulted on March 12, 2010.

Q DRUM LTD (2008). //Q Drum the rollable water container for developing countries//. Online at: <[]>, consulted on March 1, 2010.

WIKIPEDIA (2010). //Ball bearing//. Online at: <[]>, consulted on March 12, 2010.