Goal: 

A universal attachment with the initial focus on finishing the design, before offering varieties.

Functional Requirements:

• An attachment which is attachable and detachable to a "standard" wheelchair
  
• Operator can use it to propel self and wheelchair over long distances and varied terrain
• Attachable and detachable by user
• Usable/adjustable for a variety of people
• Easy to store
• Easy to lock
• Robust and safe

Design Parameters:

• Aim for $20 cost
• Lightweight
• Use bike parts
• No precision machining
• Use widely available materials in developing countries 

  Timeline:

• Week 5 – Detailed FDPPARC and research
• Week 6 – Best concept ideas
• Week 7 – Present concepts, decide on most critical module (MCM)
• Week 8 – further development of MCM
• Week 9-10 – Building
• Week 11 – Present MCM
• Week 12 – Finish prototype
• Week 13-14 – test prototype, break, repair
• Week 15 – present final prototype
• Week >15 – test and implement in developing countries!