Uploaded November 2025 | Updated September 2026, 2 weeks ago

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Demonstration of a rotor that is turned by sound pressure. It can spin either direction depending on what type and pattern of sound is applied. I also test different gases (hydrogen, sulfur hexafluoride, carbon dioxide, and helium) in addition to air at different pressures.

Dan Russell's video of the radiometer: youtube.com/watch?v=KGLFJzFt-G4

Academic paper on the radiometer: https://sci-hub.ru/10.1119/1.1645287



Laser cutter used to make the rotor vanes: cloudraylaser.com/products/cloudray-litemarker-gm-series-neo-100w-autofocus-mopa-fiber-laser-engraver-with-built-in-camera

Tweeters used in the chamber: ebay.com/itm/304754143758

Amplifier used: fosiaudio.com/products/fosi-audio-v3-300w-x2-2-0-channel-hi-fi-stereo-audio-amplifier-with-tpa3255-chip

Acoustic absorber panels: amazon.com/dp/B07T2F1NR9?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1

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