Saw saw this video the other day. Check out the drone around 13:55 regarding noise and rotor design. The whole video is worth a watch though.
The company is zipline which is mentioned in a comment above.
Saw saw this video the other day. Check out the drone around 13:55 regarding noise and rotor design. The whole video is worth a watch though.
The company is zipline which is mentioned in a comment above.