Thread: produce antigravity to get to space quicker

Hi i was just wondering
lets say we have a device which can produce a antigravity field of 9.81
so if you were standing in the field you would not be effected by earth's gravity in any way

so this would be ideal to sent space ship into orbit as we dont need to overcome gravity with our engines

is this possible?
can earth gravitational field be neutralised?

Originally Posted by dray1480

can earth gravitational field be neutralised?

Not as far as we know.

Originally Posted by dray1480

is this possible?
can earth gravitational field be neutralised?

If it were possible don't you think we'd be using it?

so if you were standing in the field you would not be effected by earth's gravity in any way
so this would be ideal to sent space ship into orbit as we dont need to overcome gravity with our engines

The slight problem here (possibly fostered by the likes of Hollywood) is that gravity doesn't hold you down, it holds you on.
Neutralise gravity and you take off in that general direction, in a straight line at Earth's radial velocity. Tangential to the surface - plowing along the longest path possible through the atmosphere - all sorts of kinetic heating problems, not to mention any high-rise buildings, mountains, people on that line...

Originally Posted by Strange

Originally Posted by dray1480

can earth gravitational field be neutralised?

Not as far as we know.

Theoretically, if we develop a nuclear weapon large enough to disintegrate it....

Originally Posted by dray1480

Hi i was just wondering

Wondering is good, wandering is even better

Originally Posted by dray1480

lets say we have a device which can produce a antigravity field of 9.81

You may try this apparatus, but it is quite expensive. And short lived
Theoretically you may be interested by this.

Originally Posted by dray1480

so if you were standing in the field you would not be effected by earth's gravity in any way

Lay dawn in that field, you would not be affected too much either.
It would be difficult to negate only earth field without negating sun's field.
So you would begin to slowly drift in undesired (and unknown) direction.

Originally Posted by dray1480

so this would be ideal to sent space ship into orbit as we dont need to overcome gravity with our engines

The ideal thing would be a space elevator. Not free, but much more affordable

Originally Posted by dray1480

can earth gravitational field be neutralised?

I hope not. I have vertigo, and I do prefer my Martini on the rocks, and not the other way round

Neutralise gravity and you take off in that general direction, in a straight line at Earth's radial velocity.

this was a plot line in a short sci-fi story i read yeeeeears ago. two rival scientists working on anti-gravity. for some reason a pool game was set up to show the effects of this field. one scientist lined up a shot that when the ball entered the field it would take off and kill his rival. everybody was thinking that the ball would enter the field and float.

i am neither a physicist nor a book reviewer. btw.

Originally Posted by Chrispen Evan

Neutralise gravity and you take off in that general direction, in a straight line at Earth's radial velocity.

this was a plot line in a short sci-fi story i read yeeeeears ago. two rival scientists working on anti-gravity. for some reason a pool game was set up to show the effects of this field. one scientist lined up a shot that when the ball entered the field it would take off and kill his rival. everybody was thinking that the ball would enter the field and float.

i am neither a physicist nor a book reviewer. btw.

Pfft, it was billiards!

Maybe when we learn how to manipulate Higg's Boson :P

If you had enough energy to get it to accelerate fast enough, long enough and high enough then it could be done but unfortunately anti gravity hasn't as yet been developed. Then you'd need to have a ship that would be able to exist in space which a very difficult thing with all that radiation hitting you.

Originally Posted by pyoko

Maybe when we learn how to manipulate Higg's Boson :P

Higgs say to leave his boson alone, enough people fiddle about with it as it is!
Oh, I see what you mean...

Several people have invented anti-gravity belts, unfortunately they've all left the solar system

the last time i saw bucky fuller(i was one of his students) he ended his press conference by saying, something like "incidentally. I've defeated the law of gravity", as he thumped a floating silvery sphere

moral
only if you think it can be done, will you attempt it

go for it

Originally Posted by sculptor

the last time i saw bucky fuller(i was one of his students) he ended his press conference by saying, something like "incidentally. I've defeated the law of gravity", as he thumped a floating silvery sphere

So did birds.
This issue is of anti-gravity.

Originally Posted by Dywyddyr

Neutralise gravity and you take off in that general direction, in a straight line at Earth's radial velocity. Tangential to the surface - plowing along the longest path possible through the atmosphere - all sorts of kinetic heating problems, not to mention any high-rise buildings, mountains, people on that line...

Good point. Unless you can also neutralise inertia, it isn't obvious that it would require significantly less energy to overcome this. (I guess I should do some math ...)

Anti gravity is not even theoreticly possible. It is not a matter of inventing a gadget, we would need to find a compleatly new theory of gravity. Best guess, it can't be done.

Originally Posted by Strange

Good point.

Is it ? Negating earth field does not mean you would not still be a satellite of the sun. If inertia is also shunted, all you will do is endure the combine effect of centrigual force of spinning earth (circling you arround its center in fact) and circling eath arround the sun (circling you again) (and all combined other circle your life is not freed yet to break)

I would advise to turn on the device at noon, you'll have that more chance to keep your footing.

thanks for the correction Dywyddyr, i did say it was years ago. that's what i like about forums and the internet, the correct answer is always out there and someone knows it.

:-)

It's got to be 35 years at least since I read that story