Meeting+Notes+Oct+31


 * Meeting Notes October 31, 2006**

1) Customer needs with specs relevant to the area that you were tasked with 2) Based on the customer needs and specs, the answer to the specific question you were tasked with from last week 3) A list of critical assemblies that we'll need to model in order to properly evaluate our design choices 4) Any design options for each critical assembly
 * Agenda:**

1) the actual mechanism 2) the user interface for that mechanism (if it requires one)

Aaron: - most of the parts are not directional - we can manufacture mainly 8 -10 parts to obtain directional mirroring, - we just to figure out how to make it backwards
 * Task Force Reports**:

Zack & Harmeet: - on rough terrain sometimes only one wheel is engaged - up slopes of 15 degrees [27 grade] (max slope going up without tipping), need a gear ratio 3.3:1 (to feel like a 1/12 slope)

Taylor interviewed a wheelchair engineer guy - the widget - proponent of wheelchair design - field trip to his wheel chair facility in Marlborough? - People have hard time grabbing things, they have gloves for that
 * Additional Information:**

Aaron - fixed gears are more cumbersome when going downhill


 * Features US vs. Them****:**

2 gears 1:1 2:1 Low gear uphill feature Can go in reverse Adds < 10 lbs to wheelchair (for the pair) so wheels are 5 lbs more than normal wheels Independence shift (while stopped) $5000 Added braking power when descending
 * Magic Wheels**

3 gears: low, 1:1, high Unobtrusive look Lower cost to manufacture Seat belts?
 * Ours**
 * Shift on the fly Brake (torsion spring for the coaster brake)
 * Single shifter


 * Cons of Coaster Brake vs. Fixed Gear:**

Coaster Brake: user thrown out if you brake too fast, forward slop (can be overcome with tension spring)

Fixed Gear: possible loss of user interface of fixed gear

- coaster or **__fixed gear__** - gear ratios - more than 3 gears - do we have to make out own hubs? - Yes we will have a brake - Uphill feature
 * Questions to Answer:**

Aaron
 * Proposed Ideas:**