4 ms·
Appears primary source of sound in helicopter blades is from blade-vortex interaction: https://wikipedia.org/wiki/Blade-vortex_interaction https://wikipedia.or
by O__________O 4y ago
Appears primary source of sound in helicopter blades is from blade-vortex interaction:
https://wikipedia.org/wiki/Blade-vortex_interaction https://wikipedia.org/wiki/Blade-vortex_interaction
Likely that even a non-toroidal half-crescent shaped tips would significantly reduce sound levels. Here’s comparable design:
https://youtube.com/watch?v=dBS1NRsYuF8 https://youtube.com/watch?v=dBS1NRsYuF8
Possible even a vortex diffuser similar to those found on submarines might help too.
- jbay808 4y agoThis also makes me wonder whether, instead of an entirely toroidal propeller, you could just put a small, appropriately-shaped toroidal loop at the tip of the prop.