Blue A: Mark Cote Courtney Greene Andrew Harlan Albert Hernandez Stabili-Bike Blue A: Mark Cote Courtney Greene Andrew Harlan Albert Hernandez

The Stabili-Bike is: Recumbent Seat Over-running Clutch Internally Geared Hub Gyroscopic Flywheel

Problem/Need Current bicycle designs are: A stable bike that: Too heavy Too large/difficult to transport Very different looking A stable bike that: Allows for a greater range of rider skill levels Teaches balance, and proper riding technique Unobtrusive appearance

Specific Market Teenagers (14+) with special needs, esp. Down’s Syndrome Also useful for anyone who has difficulty balancing on a bicycle Contact: Tom McElman, Cardinal Cushing School U.S. cases of Down’s Syndrome 350,000+ * Bikes sold domestically in 2001 16.6 million† *Source: National Downs Syndrome Society, www.ndss.org †Source: Leage of American Bicyclists: www.bikeleague.org

Design Requirements Increases stability Easier to transport Normalcy Inexpensive

Main Stability Factors Fork Angle Helps keep steering wheel straight and reject unintentional turns Gyroscopic Forces Places wheel in correct position during turns Center of Gravity Lower = better!

Bike Test Pictures

Bike Test Video

Main Features Overrunning clutch Low-rider design Gyroscopic Flywheel Allows flywheel to spin freely Uninhibited braking Continual gyroscopic effect Low-rider design Seat closer to ground Provides a lower center of gravity Gyroscopic Flywheel Flywheel is powered by user pedaling Teaches proper balancing techniques

Flywheel Concept

Front Wheel Hub Concept Spoke Interface Center Free-Spinning Bearing One-Way Locking Rod Inter-Locking Hub

Feasibility Testing gives promising results towards stability Can easily incorporate flywheel into a stock wheel Flywheel is human-powered

Questions?