Project Greenglow: Is Anti-Gravity Possible?

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Ontophobe
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I can't find any good sources on the science behind Project Greenglow. All the articles I see are full of fluff. Are they trying to divorce gravitational mass from inertial mass? i.e., trying to get more gravitational mass out of less inertial mass, or I should say more space-time curvature from less inertial mass?

As far as I know, if you want to curve space-time as much as a star curves space-time, then you need the same mass/energy/density as a star. And we think rocket fuel is "heavy"...
 
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Crackpot, crackpot, crackpot, ... (sigh)

It never ceases to amaze me how much crackpot rubbish can get funding if it holds the promise of something highly desirable (such as an anti-grav drive).
 
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That was my gut reaction, too, but I wanted to be sure