Yes, real and possible. Still the same principal an electric engine runs on. One of the biggests obstacles we have is belief in phony science. There will never be antigravity because there is no gravity to counteract. Nicola Tesla through actual scientific experimentation, Discredited most of the bunk science including The unified field theory (E=MC2) (And no the math does not work this implies that the speed of light is a constant that never changes), That is misinformation and provable. If you start with faulty data you will always get faulty results. Real science gets real results. GIGO (garbage in =garbage out) Tv actors like Neil Tyson aren't scientists they are parrots. Even when the results show that their premise is faulty they just fudge the data. That runs rampant and mainly because of the fake science they use as a foundation to start from.
Real science doesn't let other peoples "facts" sway their judgement, and let results do the talking. They ridicule real scienc