I think you can achieve reverse gravity with mercury, electricity, and a gyroscope made of gold..........I think it's possible........"" the bell " ------ it's real.......... With major radiation disadvantages, but it moves ........
I think cold fusion is anther alternative, using the cold emptiness of space, you could create almost a gliding thrust throght the universe, more of a glider........
Liquid plasma energy is going to work also especially if it's nuclear...... You could direct and focus energy Infront of the craft on a focal point thereby directing the direction of he laser plasma energy! You could even hybrid the model to be solar powered .....
Or you can fold space, hole in the paper idea. For that, u need to use something man forgot they knew! The ancients taught us about quantum waves in the universe, and tapping into the wisdom that makes ones brain think more clearly, less self, more aware........ ELON is working with them isn't he?
I have some ideas,
Just my own opinions of speculations only, i get my ideas from Lippy the Lion and Grape Ape who combined together with the Wonder Twins and GLeek, for educated opinions of speculations only using hypothesis for explaining the solution to the problem ma