A centrifugal spin on a 500-year-old air compressor design
newatlas.com
2 threads
It looks like nice, and 70 dB is very low noise for something compressing air.
I am perplexed by the symbols in the video:
https://www.youtube.com/watch?v=nr3qhBmbvs0
Water is H2O alright, but air was not O2 last time I checked.
That would be some dangerous air.
A wonderful archaic technology that is also an useful thing-to-know in post-apocalyptic settings.
Although a an apocalypse were access to compressed air sounds more like a lull than a collapse