When I was still a child–circa age 12, 13 or 14–I would come up with these invention ideas–futuristic things, usually. I never took them seriously, they were usually just flights of fancy when I got bored . But one of them (there are many more) was for an antigravity flying device. Please feel free to tell me what you think of it.
SIMPLE CONCEPT: Blimps use large helium balloons to give themselve buoyancy to fly. Then they just need propellers and the like to maneuver. My idea use a large block of antimatter to give yourself buoyancy. I reasoned antimatter is the opposite of matter, so therefore gravity must repel it. I’m still not sure of this, though. You of course would need a magnetic containment field a la Star Trek. The advantage of this device is that, unlike the blimp, it could be small–perhaps the size of car.
In a somewhat cruder invention, I use kinetic energy to escape gravity. I envisioned a weight swinging in an elliptical orbit. Each time it swings in one direction, it thrusts in that direction. Kinda crude, but it might make an interesting toy?
(If you like these inventions, my next thread will be on Einsteins theory of time dilation and food preservation. I started coming up with that idea when I was 12. I wonder if there is any money in these things.)