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Some of my very early thoughts on drone delivery.
How can a drone carry anywhere NEAR the amount of goods a small fleet of vans / small truck carry in a metro area ?
A planned route for drivers delivering perhaps hundreds of parcels each a day.
It's like freight train delivery vs a fleet of semi trucks.
A drone with one package, or perhaps a large drone 2 ?
Flight times will be fairly minimal with loads of any useful purpose.
One warehouse with great distance to cover to / from that location ? Only a metro option ?
Or a series of warehouses to make drones more effective but increasing those needs / costs.
Just the flight times alone to from depot with one or two packages would be quite high, and a lot of air traffic . . . which I don't think will be an issue as long as it's all automated and below X altitude **.
You need an equal amount of people (as drivers) I would have thought to load each drone delivery, someone (or a bunch of people) to ensure deliveries are correct, flight plans are correct.
The BIG one, safety.
Deliveries to homes where some fool or kids might get injured.
Power lines, fine defoliated branches and such that might be an issue with sensors picking them up (like we can experience), drunks ordering food and getting stupid with drones, parcel theft if left on driveways, defeats the purpose of doing deliveries to non occupied homes during biz hours.
Very likely tech advances can overcome some of these, perhaps not the human aspects of the concept.
Probably so many little things that can affect the viability of this, at least for a long while . . . a gimmick that some might use for a kick at first . . . if optional, maybe Amazon etc are planning on this being their only delivery option longer term.
Some drone related things work great, the medical winged drone deliveries on the African continent springs to mind.
** Of course we ALL should be wondering where piloted UAVs will fit this picture, if eventually UAV automated delivery and airspace overcrowding do 'take off' (pun intended).