Overview
This project is a toy which converts heat energy into kinetic energy like a thermodynamic heat engine as it consists of a 4x4 gird of 16 “drinking bird” toys.
Explanation
A chemical, known as methylene chloride, with a very low boiling point is the blue fluid inside the toy. The playback cycle begins when the head of the toy bird is saturated with water. The methylene chloride inside condense as the head cools when the water evaporates. A pressure differential between the head and the body is created by this in which the fluid is forced up through the body into the head. The center of gravity shifts and the toy tilts once enough fluid has passed into the head. This allows more water from the glass to be taken up as the internal fluid is allowed to flow back down into the body, then repeating the whole cycle.
The playback of an audio file of a significant speech is controlled by a tilt switch to which each toy is wired. At the start of each tilt event, the audio spins up from zero to full speed and vice versa.
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