Dave-- I believe there are 2 forces that are involved in moving a massive object in space/time system. One is the inertial force required to achieve a velocity relative to some point and the other is the force to overcome a gravitational attraction to a large body as a result of a significant gravitation force field.
If the EM drive only voids the gravitation field, there would still be a need to overcome the inertial force to achieve motion in the space/time coordinate system(F=MA). It is my understanding that the EM drive only voids the gravitation field and thus eliminates that force of gravity on a massive object. How it does this trick is the hard-to-believe phenomena being stated by the inventor. It seems there is a conjecture that the invention bends or cancels the gravitational field so that it does not act on the object being "shielded". Bob ----- Original Message ----- From: David Roberson To: [email protected] Sent: Monday, May 11, 2015 10:31 PM Subject: Re: [Vo]:Nextgen EM Drive's Potential seems way above the Theoretical Limit I agree that hovering does not violate Newton's laws. That is a special case. Take away the gravitational attractive mass and that is no longer true. That same force should cause the ship to accelerate, which then violates the laws. Most of the uses for an EM Drive appear to involve accelerating the mass of the ship in regions of space that are not balanced by gravitational forces. Why concentrate upon a very special case instead of the more general applications for these drives? Hovering is useful, but it is not going to enable one to travel among the stars. Is there any reason to suspect that the typical EM Drives that we are discussing are only useful to balance gravitational forces? Dave -----Original Message----- From: Bob Cook <[email protected]> To: vortex-l <[email protected]> Sent: Mon, May 11, 2015 9:49 pm Subject: Re: [Vo]:Nextgen EM Drive's Potential seems way above the Theoretical Limit Hovering does not violate Newton's laws IMHO. Energy and momentum are conserved. Bob Cook ----- Original Message ----- From: <[email protected]> To: <[email protected]> Sent: Monday, May 11, 2015 6:44 PM Subject: Re: [Vo]:Nextgen EM Drive's Potential seems way above the Theoretical Limit In reply to Frank Znidarsic's message of Mon, 11 May 2015 18:58:16 -0400: Hi Frank, [snip] >The video states that m drive obeys Newtow's laws. It has no reaction >mass. It does not obey Newton's laws. That comment was an understatement >bordering on misinformation. > > >Frank Z Which of Newton's laws does it violate? Does a car going down the road doesn't have reaction mass? Does it violate Newton's laws? Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/project.html
