Installed in the Echo Gallery at the 2010 Megapolis Festival in Baltimore, Neil Feather's thunder wheels make the sound of rolling thunder. First a bicycle wheel has its tire studded with 10 to 30 strong magnets. Then a drumhead gets a magnet sandwich mounted towards the center of its head. The wheel is mounted to the drum such that the wheel magnets repel the drumhead magnets as the wheel magnets spin past. The wheel is spun and it sounds like thunder.

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Video shot by Megapolis artist Andy Cavatorta

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