Oh you don't use 3S you use 4S, I see. ;) Seriously though, I don't know, I see multirotors as being a reconnaissance tool if anything, modern missiles are pretty much mini jet planes, and in my mind they'd beat a rotorcraft every time for stuff like ground attack.
And nothing is inexpensive when its for military use, some of the drones they currently use are basically foamie RC planes with some smart features, and the unit cost is still well into tens of thousands of dollars[0]!
Also, the reason I mentioned delivery is because you said "Why spend billions on the F-35" - evidently the multirotor idea requires a solid aerial platform that keeps the pilot safe just as much as the guided bombs currently do. Although in the future I could imagine this being done from larger drones similar to the Predator/Reaper.
And nothing is inexpensive when its for military use, some of the drones they currently use are basically foamie RC planes with some smart features, and the unit cost is still well into tens of thousands of dollars[0]!
Also, the reason I mentioned delivery is because you said "Why spend billions on the F-35" - evidently the multirotor idea requires a solid aerial platform that keeps the pilot safe just as much as the guided bombs currently do. Although in the future I could imagine this being done from larger drones similar to the Predator/Reaper.
[0] https://en.wikipedia.org/wiki/AeroVironment_RQ-11_Raven