3 ms·
Previous urban delivery drone services had trouble with noise complaints, could be related to that?
by 6nf 3y ago
Previous urban delivery drone services had trouble with noise complaints, could be related to that?
- ThisIsMyAltAcct 3y agoWith 4 counter-rotating props, that would not surprise me
- rkagerer 3y agoRecently discovered Sharrow boat props. Apparently the guy who invented them first developed the the concept for reducing noise from drones filming orchestras. I'm surprised we aren't seeing more widespread availability yet of "tipless" drone propellers. https://youtu.be/MNnB_50Z20I?t=553s https://youtu.be/MNnB_50Z20I?t=553s Previous HN discussion: https://news.ycombinator.com/item?id=33949895 https://news.ycombinator.com/item?id=33949895 Similar design MIT patented: https://news.mit.edu/2022/lincoln-laboratory-inventions-win-rd-100-awards-0921 https://news.mit.edu/2022/lincoln-laboratory-inventions-win-...
- Zanfa 3y agoThere may have been new attempts, but when I last looked into these types of drone propellers, nobody seems to have been successfully able to demonstrate they actually offer significant improvements (either noise or efficiency) over traditional designs. To be fair, the limiting factor might be manufacturing capabilities, given most attempts were using 3d printed propellers which results in terrible surface finish, compared to injection molding.
- borissk 3y agoOne way to solve the noise problem is a drone flying high and dropping the parcel on a long rope.
- rkagerer 3y agoThanks. The boat prop offers some efficiency gains in mid-range speeds and better hole shot acceleration, but I guess the benefits don't carry to smaller scales and less viscous surroundings.