The bike is a standard road bike with 27-inch wheels and six gears. The seat is the only object on the bike that can be adjusted for varying body dimensions. For each test subject, the seat is adjusted to obtain full extension of his or her legs. The steel frame is designed to be positioned flat on the ground to maintain stability and reduce vibration and flex. It is attached to the front and rear dropouts of the bike to position it against the spindle for maximum energy transfer. The spindle is an aluminum roller wrapped in grip tape to maintain traction, and is connected to a pulley that rotates the shaft of the generator, which is mounted to the steel frame.
If a continuous resistor is wired to the generator, then the resistance will be constant and therefore no meter is required. A volt meter is connected in parallel to measure the voltage traveling through the wire and data is recorded every fifteen seconds for a given time period. The amount of energy produced from the machine is determined by the rotational speed of the wheel and the gear ratio between the wheel and the spindle. Since the wheel is 27 inches in diameter and the spindle diameter is 1.22 inches, then the gear ratio is 22:1. The wheel speed is determined by the pedal rate of the test subject. Since this is variable, an anemometer is attached to the frame to track the revolution per minute of the wheel. To track data the three monitoring devices, the clock (seconds), volt meter (volts), and anemometer (rotations per minute) are aligned on a table to be logged accurately.
The experiment took place within the Cliff May room at the NewSchool of Architecture & Design between the hours of 6:00 p.m. and 8:00 p.m. This room was chosen for its spatial qualities so that it would aid in the exercise. The room is a well lit space with a high ceiling that draws hot air away from the ground. Three fans located on the ceiling circulate the air in the space, and along the west wall operable windows allow air to enter for proper ventilation and air quality. This environment provides a comfortable air temperature and adequate air quality, which are necessary factors for exercising. If a person operates within a warm, poorly ventilated environment, the human body can overheat and cause it to slow down. This would affect a person’s ability to function and would limit the production of energy.
The array of lights provided a visual cue of the transfer of human power and served as a motivational device for exercising because the lights dimmed when the test subject slowed down. The anemometer was intended to track the revolutions per minute of the wheel but it failed to work properly. The revolutions per minute is not a factor in calculating the power generated by the test subject, but it serves in the understanding of the rotational speed of the generator for applying the concept of energy production to other forms of exercise equipment.
Test subject one was able to generate a higher voltage for the first two tests and was able to cycle considerably longer in the third test. The only difference from the other test subjects is in body height. Test subject one is at least six inches taller than the other test subjects. This suggests that a person’s height can affect his or her ability to produce energy.