Product+Contract


 * V.2.

Product Description:**


 * Intended Customers:**


 * Market:**


 * **Customer Need** || **Product Attribute(s)** || **Engineering Specification(s)** ||
 * Maintains current ergonomics of wheelchair || Shoulder width to hand rim width (Taylor, Erik) || [ratio] for 20th - 80th percentile ||
 * Maintain foldability || Binary (Jin Adam) || yes ||
 * Easily transportable || Time to remove wheels (Taylor, Erik) || < traditional quick release wheelchairs + 5 sec ||
 * || Additional weight (Logan, Myoung) || 7 lbs ||
 * maintain appearance of normal wheelchair || number of rims per wheel (Taylor, Erik) || 1 ||
 * || diameter of wheel(Logan, Myoung) || 24" ||
 * || diameter of rim (Taylor Erik) || 20 inches +/- 1" ||
 * || distance between shifter and hand (Phil Brentan) || < 6 inches ? ||
 * Provides the user with a mechanical advantage / disadvantage (Harmeet Zack) || gear ratios: high, regular, low (Harmeet, Zack) || high: less than 2 ||
 * ||  || regular: rim to wheel ||
 * ||  || low: (tbd? Z+ H) ||
 * Can go in reverse direction (Mario, Mooner) || binary || yes ||  ||
 * Maintain user experience || amount of backlash between wheel and hubs || < 20 degrees (Harmeet, Zack) ||
 * Hubs need to be reliable || mean time to failure || 3 years / x operating hours ||  ||
 * || input torque ||  ||   ||
 * || max carrying weight ||  ||   ||
 * Provides shifter feedback || realization of shift change || 90 % for 10 - 90 percentile (Moneer, Mario) ||  ||