Talk-Polywell.org

I like chrismb's more recent analysis of the issue - *if* a ME thruster is truly thrusting against 'the rest of the universe', then its thrust-energy relationship will be dependent on its velocity wrt the rest of the universe. Would figuring out what the actual rest frame is for 'the rest of the un...

That's funny because I distinctly recall Bond and his team are all from Rolls Royce. They're accustomed to designing turbine engines, not spacecraft. Just sayin', I've been following for several years and I have seen no evidence that any serious work has been done on Skylon itself. There's plenty o...

And still they're stuck with the common sense analysis that Musk has offered each time asked abut Sabre. What you want to do with going to orbit is get out of the atmosphere as quickly as possible, because its like soup, and get in relative vacuum where it's easier to go fast. The weight that Sabre...

parallel wrote:Jded,
Sounds promising to me.

For replacing some of the current capacitors, yes. Batteries, no.

I think it's pretty safe to say Brett is hopelessly confused about coordinate systems and what going faster means. His examples are factually incorrect and his thinking is backward. Facts is, 100X faster is the same in every coordinate system and every frame of reference. Brett just hasn't figured ...

These are extremely bad news. Skeptics at theeestory were saying for many years that you can have high permittivity and low breakdown/saturation, or low permittivity and high breakdown/saturation, but you can't have them both high (and thus high ED), because the actual physical limit is connected to...

i'm convinced parallel is the RSS feed from rossi's dreams For over a year “parallel”: one of the noblest and longsuffering members of our number has done yeomen’s work in tirelessly bringing us the latest in Rossi's breakthrough technologies, sage wisdoms, inspired utterances, and earthshaking new...

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"Killing a bacteria with a nuke? Flying in atmosphere is easy. Even we can do it. Flying in atmosphere with a Mach drive is even easier. Negating inertia of a whole ship (and who knows how much air around it, to avoid cavitation, extreme friction etc.) is not. It's several orders of magnitude more ...

I was thinking in terms of "ordinary" mach thrusters. Using fully blown warp drive to stroll around in atmosphere seems... well, few orders of magnitude less likely (even with the technology given), then "all the people reporting these things being wrong" Why? Killing a bacteria with a nuke? Flying...

. . .there is no reason to think that Mach thruster would take away passenger's inertia (allowing arbitrary high acceleration)... What GeeGee said. Basically, all warp craft fly on a time-like geodesic, so passengers and the craft do not experience inertia of any sort. They all experience weightles...

Just a thought: do we take into account that movement (velocity) changes the light cone, so what constitutes the far-off distant mass also changes? The "edge parts" that swap would be left with some net momentum. I thought of that, but as I understand relativity, it doesn't actually work that way, ...

I should go to bed, but it seems to me that it is in fact the same issue. If the force were exerted on a static background, no configuration could ever result in a PMM2. Linear operation as a 'cosmic MHD turbine' could generate power, but the flywheel idea wouldn't. No, the velocity and orientation...

I'm pretty certain that we made the accelerating expansion joke within the last year or two... it's probably between 10 to 20 pages back in this same thread... Yeah, we did. We concluded that someone would need to move whole galaxy clusters around for the observed size of the effect. Well, maybe th...

"goodbye second law of thermodynamics" on the other hand is the same dismissal that GoatGuy focuses on. It is the unstated refusal to draw the mass-energy box any bigger than locally, but since without an actual physical reason to make that refusal, that is actually a weak argument. Thus it is thro...