Mary Bratschi

1
Nicaraguan Fan

• Mary Bratschi
• Stephanie Jagusch
• Joe Nugent

2
Project Purpose

• To create a mechanical ceiling fan that operates
  without the use of a standard electrical
  connection for use in rural Nicaragua

3
Constraints

• Total Cost lt 5 USD
• Run Time 30 min
• Can be made, repaired, and used in Nicaragua
• Only sponsor specified materials
• Only sponsor specified mfg. processes

4
Math Model Results
5
Math Model Results Cont.
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Description of Final Design

• Weight Driven System
• Rocks, a fabric bag, and string as the weight
• Wire fabric blades
• Peg-style gears
• Rebar main shaft
• AISI 1018 Steel supports

7
Advantages of Design

• Calculated theoretical run time 30 minutes
• Conforms to
• All material requirements
• All mfg. process requirements
• Cost requirement, 4.53 USD

8
Testing Results
9
Testing Results Cont.
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Conclusions Future Work

• The fan needs more work
• Use lower weight materials
• Use better bearing surfaces
• Redo equations and simulation to include friction
• Get new RPM for each desired time
• Full DOE to determine how each parameter affects
  the system

11
Acknowledgements

• Grand Valley State University
• Dr. John Farris
• Dr. Chris Pung
• Bob Bero Machine Shop Student Workers
• Dr. Sozen
• Dr. Hugh Jack
• Dr. P. N. Anyalebechi
• Dr. Paul Lane

December 6th, 2007