Power To The Pedal

Competition Details
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Human/Electric/Wind Try-brid Bicycle

by tom miller
Co-authors:

This solution seeks to address a multitude of economic and ecological issues. The user scenario is developing countries where the bicycle can still meet basic transportation needs. With few modifications the bicycle can address several other obstacles that developing countries face. Currently 1.7 billion people are without electricity for basic human needs and economic development. According to a recent study by Lighting Africa, Sub-Saharan Africa has a rural electricity access rate of 2%. Among the poorest of poor, lighting represents 10-15% of the total house income while providing little in return. Cost effective, renewable lighting can expand the working day for small businesses, enhance safety, improve education, and improve gender equality and health services. The design approach was to create something that could be assembled with simple tools. The frame is composed of small diameter tubing that can be easily bent on a rig. The chain link and sprocket was eliminated in favor of a cam drive. A more traditional chain link drive creates manufacturing challenges and maintenance concerns. Cam drives are becoming more readily available and can be adapted to a variety of frame sizes. Composite wheels were selected for ease of manufacturing and low maintenance. Composite wheels also allow for the incorporation of electric motors. The electric motors are wired to a lithium ion rechargeable battery array. When the wheels spin, the batteries are recharged. The motors can propel the bicycle or recharge the battery array. Additionally, the bicycle frame can be configured to harness the wind to charge the array and power solid state lighting or small electric devices. This solution seeks to enable developing countries to propel themselves to a brighter, greener and more productive future.