flannel jesus wrote:I wasn't actually calling you a troll. Those sorts of machines, though, are exactly the sort of thing that belong in a "troll physics" cartoon. Troll Physics consists of a lot of ideas that may seem like good ideas at first glance, until you realize that, like these machines, certain laws of physics are necessarily being violated to produce the stated results.
There's probably a technology on its way that will make the production of energy much cheaper and much cleaner than it is now, but I don't think that technology will be one of these Net Inertial Propulsion machines. Thus far, they've all been failures and we have 0 evidence that they work.
Some of them work... a bit. I haven't seen anything that qualifies as a "launch device."
I looked but couldn't find one citation I ran across back in 1998 that would likely work in free fall, using a repeating bombardment of ball bearings against the direction of travel, then the bearings were returned to the thrusting mechanism. NASA was looking at that one for deep space probes, but that's about it.
I don't completely call them pseudo science because they are novel, but I think they would be an incredibl;e waste of energy. A rocket is more efficient.
What do you think about gravity itself? One suggested process for mass attraction involves quantum loops of gravity. That would be much like magnetism, where lines of force reach up and pull matter inward.. Pushing gravity is the product of an inbound stream. As it stands, pushing gravity neglects to address what happens to these inbound particles. The answer to that starts looking, mathematically especially, like a pinball machine's trajectories within the 5th dimension.
Thus this subject proliferates.