3 ms·
How do you figure? With anti-gravity, you would need very little power for propulsion since gravity would not be a factor (or less, depending on how effective
by midoridensha 4y ago
How do you figure? With anti-gravity, you would need very little power for propulsion since gravity would not be a factor (or less, depending on how effective your anti-gravity tech is). The question is how much power the anti-gravity requires.
- mr_mitm 4y agoI suppose "we just need anti-gravity" is equivalent with "we just need to violate energy and momentum conservation".
- moring 4y agoIt could also mean: We only have to feed the escape energy of the rocket itself into the rocket while it is on the ground, and without also carrying fuel upwards.
- quickthrower2 4y agoThe “anti gravity” was just zero altitude momentum all along. Just use that big washing machine thing. Can’t stick humans in it though :-(
- betwixthewires 4y agoI would assume (with good reason) that the amount of energy needed to generate a counter to the gravitational field would be the same as the amount of energy required in thrust to do the same thing.
- YesWeWill 4y agoStill, having a drive that doesn't need to push stuff out of its back would be very interesting, IMHO - even if it doesn't work out better energy-wise.
- galcerte 4y ago> The question is how much power the anti-gravity requires. This is essentially a case of "draw the rest of the owl".
- michaelmrose 4y agoGravity is the shape of spacetime. Why would antigravity be a thing.
- YesWeWill 4y agoAlcubierre drive essentially changes the shape of spacetime, doesn't it?
- mr_mitm 4y agoEverything (that has mass or energy) changes the shape of spacetime.
- YesWeWill 4y agoSure, my point is that the changes made with Alcubierre drive are controllable.
- simiones 4y agoNot really. The Alcubierre "drive" is closer to a "shape", a static solution to Einstein's equations. There is no proposed device that actually achieves this shape. The only idea along those lines implies a kind of Alcubierre railroad - you set up a path of negative mass matter (which almost certainly doesn't exist) and then move this with regular means as the ship is approaching, thereby continuing the bubble for the ship.
- forgotpwd16 4y agoCan be a defect in spacetime. See: https://arxiv.org/abs/1803.09736 https://arxiv.org/abs/1803.09736