Submitted by Ok_Champion6840 t3_10mvasn in UpliftingNews
FlatteringFlatuance t1_j69iunr wrote
Reply to comment by LiverOfStyx in Toroidal propellers: A noise-killing game changer in air and water by Ok_Champion6840
Jokes on you the propellers were running in both videos. That's how quiet they are 😎 /s
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