We meet with our family on Wednesday Sept. 14th in Livingston, Tn. Our project is for a child that has low to almost no feeling in his feet and toes. He is only 2 years old and has to use a walker to get around with right now. He spends a lot of his days in varied therapies and has had two surgeries. During one of his surgeries he actually ended up losing feelling in part of his feet. He has an older brother and sister and loves spending time playing with them so the goal of our project is to get him to where he can interact better with his older siblings.

Design Specifications

A frame that is light weight.
We need to make the trike adjustable so he can still use it the older he gets.
He has limited strength in his arms and legs so we need a trike with different gear ratios so he can start on an easier or lower gear and build up strength as he gets older.
Tricycle must have easily maneuverable controls.
The mother wants to have a handle attached to the trike so she can help push and control incase her assitance is needed.
We want the bike to be portable for the family also so they can easily load it up along with the bikes of his older siblings.
We will need to include straps on the foot peddles.

Design Concepts

Concept Evaluation

Rated 1-5, Worst to Best

Consideration	Design Concept 1	Design Concept 2	Design Concept 3
Ease Of Use	3	4	3
Cost	4	3	3
Learning Cuve	3	4	2
Motion/Manuverability	5	4	1
Ease Of Construction	3	2	1
Safety	2	5	5
Total Score	20	22	15
Design Choice	Design Concept 2

Design Overview

Design Concept 1:
Pros

Easy to Build
Handle/Pedal style allows the client to constantly supply force with both hands because they will be able to grasp the handle. This will allow them to push and pull with both hands.
Dual powered wheels gives better control and traction.

Cons

Least stable seating position
Pedaling with hands can be put into strange angles while turning.
Requires high degree of coordination between pedaling with feet, and pedaling and steering with hands.

Design Concept 2:
Pros

Leanded back posture of seat is comfortable for client.
Dual powered wheels gives better control and traction.
Handle/Pedal style allows the client to constantly supply force with both hands because they will be able to grasp the handle. This will allow them to push and pull with both hands.

Cons

Pedaling with hands can be put into strange angles while turning.
Chain could get in way of turning the front wheel.
Requires high degree of coordination between pedaling with feet, and pedaling and steering with hands.
Difficult to build

Design Concept 3:
Pros