1. Introduction: Bike-driven fan

2. Design Considerations     3. Kinematics     4. Prototyping & Building     5. Results & Discussion

I often ride my bike on an indoor trainer (Fig. 1) and use a box fan to keep cool. I would prefer not to use electricity to run to fan while the power I produce on the bike goes to waste. Thus, the purpose of this project is to use the rotation of the bike trainer to drive a fan. Specifically, I want to transfer the rotation behind the real wheel of the bike to where the rider is seated at a rotational velocity equal to a typical box fan, or about 500 - 1200 rpm. 

Figure 1: The rear wheel of the bike causes a cylinder to spin via frictional force. This rotation spins the small wheel outlined in blue, which is a fan designed to cool the trainer mechanism. This wheel is where the rotational motion of the bike trainer is most accessible to be attached to the fan mechanism. 

2. Design Considerations     3. Kinematics     4. Prototyping & Building     5. Results & Discussion