Meeting+Notes+Oct+29


 * Meeting Notes October 29, 2006**


 * Task Reports**

Zack & Harmeet – Gear Ratios
 * Ratio of hand wheel to rim.53:1 serious athletes
 * Court chairs (b-ball) cambered 3-9 degrees
 * Optimal for resistance is straight up and down
 * Low gear: drag a wheelchair up a ramp & grass to figure out the forces and what gearing we need to do for that.
 * People can exert over slope of 112 degrees maximum for a wheelchair ramp 1:12
 * Find typical output for people in wheelchairs
 * Look at where forces are applied in the wheelchairs

Adam & Jin - Hub
 * new technique to convert got rid of slop 1:1 and 2 lower gears
 * you could just make the hand rim smaller
 * actual conversion may take some time, but fixed gear hub on e-bay
 * Look into customer feedback if they want coaster brakes or backward drive-ability (more important than coaster specialty)

Mooner & Mario – Uphill forward only Feature
 * plan to converse with rehab residents
 * if necessary, what are the requirements… is going in reverse necessary in going uphill, spam a wheelchair forum, develop a list of specs

Phil – Shifter Interface
 * info seems contradictory, quick release to put in trunk of car (drop out system)
 * want one shifter, but not change appearance
 * switch can either rotate or slide
 * number of user inputs vs. number of crazy gadgets on our chair

Logan – Overall interface + ergonomics
 * hesitant to stray away from current wheelchair norms
 * 750 mm width spec for wheelchairs
 * Mock up rim may not be the best ‘cause of overall feel
 * Most people can’t make 1:12 for 10+ meters, 1:16 is much easier, 1:20 is
 * Could test in tunnels under building 66


 * Assembly Review**

Product Contract: needs, attributes, specs Assembly Model: completeness and quality if design

Requirements:
 * a descriptive jpg image that shows your complete assembly from an informative viewpoint;
 * all of your native CAD files;
 * a list of who modeled the different parts in the assembly (each team member must model at least one part);
 * and a pdf version of your product contract.


 * The Plan:**
 * 1) Individual Specs with degree of certainty (it can’t make noise, reverse important)  monday night
 * 2) Overall Specs (backbone of product contract)
 * 3) Design Everything
 * 4) Model It

Basic Questions:
 * 1) Fixed gears mandatory
 * 2) 3 gears: low, regular, high
 * 3) what’s a list of all gear ratios we can get?
 * 4) no uphill feature
 * 5) independent shifting, done by hand,
 * 6) same size rims, only 1 per wheel
 * 7) minimal spokes (to prevent finger catching) covering?, wheels to be standard size

Basic Specs:

http://yellowb.wikispaces.com/Product+Contract

We are meeting Tuesday night