4 ms·

You would definitely hear it at 100ft and 100mph. I race drones and they are LOUD. If it's some DoD tech then maybe they figured out how to make it near silent

You would definitely hear it at 100ft and 100mph. I race drones and they are LOUD. If it's some DoD tech then maybe they figured out how to make it near silent but it'd have to be some real state of the art prop design.

pillefitz 5y ago
Not every drone is a quadcopter, could have had wings of some kind (?)
- qeternity 5y ago
  It’s the electric motors that are loud. Fixed wing still suffer from that, though not as loud.