Anon12/03/25, 02:55No.16862000
>16861991
Anti-gravity is kind of bullshit. There's already an affect of increased thrust when close to the ground because you're starting to resist against something solid instead of simple more air. "Hovercrafts" abuse this effect but they don't ever leave the ground or even get clearance. There's also other air movers other than simple rotors that are overlooked and might do a decent job of impersonating a hovercraft but they're nowhere near as efficient, because spinning is efficient (and angling those blades provides tons of control). "Anti-gravity" that sits low to the ground is already classed by extant vehicles and "anti-gravity" that could operate in a vacuum or without air thrust might be a "kraken drive" (using Kerbal language RIP Kerbal) which is really just a device entirely unmoored from real physics.
The most promising earth-shattering future-tech is definitely portals because while the energy demands are immense if you figured out the clever trick you would only need maybe a few neighborhood block's worth of power (But not electricity, I think you're looking for "negative energy" as a method to manipulate spacetime). Why do I know this? Do I have a big name in physics? I deny both things, I only speculate desperately trying to put together things that I know are possible.
FTL communication is an absolute laugh if you give up on machines and just figure out the most reliable forms of entanglement... what machine does that?