Week 4

• This week we began construction of our final filter design
• We decided on using a regular soda bottle to form the outside of the filter
• The building of the filter: (collaborated by all group members on 4/28)
• The helix was built out of plastic film that had to be hand cut and measured to make it fit and be water-tight. This was difficult to build and cut with scissors.
• The plastic helix had to be epoxied to the center pole 
• This then will dry and be put in the bottle
• Josh and Laura cut plastic
• Steve and Joe added helices to bottle 
• Picture of construction:

• The first part (helix) of the filter. We have to wait for this to dry and then we can put it in the soda bottle in 2 days.

• We finalized our Gantt chart and are tracking our weekly progress. Below is the chart (by Steven Guarneri):