sometime in the near future...

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spacefire

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...we will have antigravity engines that we can install on vehicles. Now, I have no proof of this, but I don't need to because I am making a prophecy <img src="/images/icons/smile.gif" /><br /><br />How will antigravity benefit space flight? Well, it will be great for leaving the planet, but the thrust will decrease as you move away from the body. So it's virtually useless for deep space flight. Remember, your thrust vector will have to go through the center of mass of the bodies around you, so you won't be able to achieve LEO with antigravity alone. Maybe GEO, or very slow trips to the Moon. I don't think a star can be used for propulsion.<br />Gravity multiplying will allow for some maneuvers but again, its use will be limited to very short ranges.<br />Antigravity will be great in braking while approaching your target. You can bring your whole ship down to the surface of the Moon, Earth or Mars. To get from Earth to Mars in a lifetime, you still need some sort of impulse exchange.<br />So...I think in less time than any of you think, there'll be antigravity cars, planes and spaceships.<br /> <div class="Discussion_UserSignature"> <p>http://asteroid-invasion.blogspot.com</p><p>http://www.solvengineer.com/asteroid-invasion.html </p><p> </p> </div>
 
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no_way

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"the thrust will decrease as you move away from the body." How can you tell that before formulating the fundamental working principles of antigravity ? The rest of your post is all based on the same assumption
 
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crix

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Because THEY told him. : P <br /><br />And if it is truly antigravity you might be able to get into LEO by using the sun's antigrav force for your "sideways" speed.
 
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bdewoody

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I'm not so sure it would be called an engine, maybe instead a generator. I'm also sure that at this time no one has developed a workable plan to make such a device as we still aren't 100% sure of the nature of gravity and it's properties.<br /><br />But I do hope one is in our future as I believe it is absolutely necessary before routine space travel comes about. <div class="Discussion_UserSignature"> <em><font size="2">Bob DeWoody</font></em> </div>
 
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barrykirk

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This is still in the conjectural catagory. It may be theoretically possible, again the key operative term is maybe.<br /><br />However, given that, who is to say that an implementation of anti-grav drive might not be more mundane than pushing against the earth.<br /><br />What about using it to push against onboard reaction mass at short range? Think of an ion engine with a much higher exhaust velocity.<br /><br />Again I repeat this is pure conjecture with none to little experimental evidence behind it.
 
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qso1

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I'm with you there as far as anti gravity being the wave of the future. But as to how or when, another matter entirely. But like you said, your basically making a prediction.<br /><br />I'm utilizing anti-gravity as the method for interstellar propulsion for a book I'm writing that will never succeed or be published...but thats another matter. In that book, I put some general concepts on how the system works and of course, I'm no scientist so its all purely conjecture on my part. <div class="Discussion_UserSignature"> <p><strong>My borrowed quote for the time being:</strong></p><p><em>There are three kinds of people in life. Those who make it happen, those who watch it happen...and those who do not know what happened.</em></p> </div>
 
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nyarlathotep

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Shouldn't this be in one of the kook forums like freespace or that environut one?
 
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alokmohan

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Antigravity is mere scientific conjecture.But to post this in this forom is ok.Why free space?It seriously thought of matter.At the same time it is a thing of future or not only future can say.
 
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qso1

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alokmohan:<br />Antigravity is mere scientific conjecture...<br /><br />Me:<br />Which is why I'm utilizing the conjecture for a book rather than as an actual proposal. <div class="Discussion_UserSignature"> <p><strong>My borrowed quote for the time being:</strong></p><p><em>There are three kinds of people in life. Those who make it happen, those who watch it happen...and those who do not know what happened.</em></p> </div>
 
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nyarlathotep

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<font color="yellow">Why free space?It seriously thought of matter.At the same time it is a thing of future or not only future can say.</font><br /><br />Missions and Launches is for Missions and Launches. Also currently built hardware, or hardware which could conceivably be built using current technology. Not 'fringe' physics.
 
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alokmohan

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It is not followed so strictly.Idea of antigravity is there among scientists.
 
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nyarlathotep

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Well, most would only call them 'scientists' in polite company.
 
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bdewoody

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By whose criteria are posts limited to your definition? <div class="Discussion_UserSignature"> <em><font size="2">Bob DeWoody</font></em> </div>
 
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moonmadness

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Why would one need propulsion from AG generator?<br />Wouldn't tech that could merely 'nullify' gravity waves take mass out of the basic equation F=ma?<br />I bottle rocket could send a man to the moon. <img src="/images/icons/smile.gif" /><br /> <div class="Discussion_UserSignature"> <p>I'm not a rocket scientist, but I do play one on the TV in my mind.</p> </div>
 
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strandedonearth

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Mass would still be there. Mass is what makes getting hit by a pinball hurt more than a ping-pong ball. Antigrav would make the g in F=mg equal to zero.
 
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thinice

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<i>If gravity is indeed waves, then we will be able to create waves with opposite amplitudes to cancel it or to make repelling forces.</i><br /><br />Gravity <b>is not</b> waves. The gravity we know is a static field. The theory of relativity predicts that rapidly moving masses emit gravitational waves. But this radiation is so extremely weak, that there is a very small chance of its direct detection.
 
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publiusr

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Nick Cook of Jane did a lot of work--but I wonder if he was duped. The lifter people got duped by ion wind--and the Larry Smalley Ning Lee folks (the spinning disk people) don't do much these days.<br /><br />I know at least one person at Jacob Sverdrup--no longer with them--who was pursuing work on anti-gravity.<br /><br />I think I'll stick with HLLVs.
 
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