Flight between Zhongshan and megacity of Shenzhen takes around 45 minutes and costs 40 yuan (US$5.60) per order, according to UAV-maker Phoenix Wings, which is backed by Chinese logistics giant SF Express.
turns out that problem got figured out and you can make propellers that are basically silent https://dronexl.co/2023/05/04/how-do-zipline-silent-propellers-work/
turns out that problem got figured out and you can make propellers that are basically silent https://dronexl.co/2023/05/04/how-do-zipline-silent-propellers-work/