Team Red A. Market 500,000 people a year are injured by ladders Approximately 300 ladder related deaths a year In 2006, there were 732,175 construction.

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Presentation transcript:

Team Red A

Market 500,000 people a year are injured by ladders Approximately 300 ladder related deaths a year In 2006, there were 732,175 construction companies in the US In 2006, over 126 billion households in the US Sources: On the House (Sept 24, 2008) U.S. Bureau of Labor Statistics US Census Bureau

Customer Needs Safe alternative to a ladder Ability to be up high and move around Painting Decorating Cleaning windows Reaching elevated ceilings Cleaning gutters Rentals for a one time job (painting outside of house) Lightweight and easy to store away

Technical Feasibility Basic Dimensioned Design: Linkages are Al box extrusions 2” x 54” X 0.8” bar cutout 0.2” in from each side Person: 6ft male,120 kg COM person = 3.36 ft COM system = 8ft 1 ft 8 ft 1 ft

Technical Feasibility A 5 weight of person pull weight of structure height Torque = pull * height – weight of structure * COM Height = 8 ft Weight of structure = 75 kg COM = 2.63 ft Maximum Force = 52.6 pounds force

Technical Feasibility B 150 pounds force 100 pounds force Distance (ft) Torque (lbs force*ft) What would happen if we used supports? Variable pull force F Variable distance x Torque (lbs force*ft) 200 pounds force Distance (ft)

Illustration of Model 7