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  #11  
Old May 15th, 2019, 03:48 AM
Condottiere Condottiere is offline
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Creating a force field that strictly focusses the explosion along a two dimensional plane defined by gravitation would require some form of gravity/tractor/repulsor generator, which would be a one shot device, as I would assume it would be consumed during said explosion.
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  #12  
Old May 15th, 2019, 11:58 AM
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Yes. A modified grav belt seems like a strong possibility but then TDX would be so expensive no one would use it. Or use the grav belts for assault troops instead of land mines.

I'm starting to think about nano tech as opposed to gravitics. Maybe TDX is a ring of tiny cannons all facing outward. But then that's not really TDX I suppose.
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  #13  
Old May 15th, 2019, 10:44 PM
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Quote:
Originally Posted by nobby-w View Post
I did think about vertical TDX once but realised that you could achieve the same effect with a shaped charge.
TDX is, too... a v-channel in a ring.
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Old July 7th, 2020, 08:31 PM
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Quote:
Originally Posted by kilemall View Post
The thought I had behind my effects description was that the explosive itself is sensitive to the gravitational field- if it was just shaped charge the gravitics component could be ignored. So, part of that 'understanding and manipulating gravity' thing transposed onto an explosive.


If you had some sort of gravitic field emanating from a device in the center of the explosive, no need to bother with the intermediate explosive bit, just use that grav field generator as a buzzsaw.


In a sense this tech could be precursor to the PGMP/FGMPs, which after all are long-range plasma bolts that hold together their field coherently, only in a directional pointy end manner.
IIRC, Blish used it in his "Cities in Flight", book 3? He described it as an explosive with polarized atoms, so that somehow they were constrained to move only perpendicularly to gravity--hence a flat plane (TDX = Two-Dimensional eXplosive, I believe).

Blish wrote:
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Miramon goggled. "Impossible. An explosion has to expand evenly in all directions that are open to it."

"Not if the explosive is a piperazohexynitrate built from polarized carbon atome. Such atoms can't move in any direction but at right angles to the gravity radius...
But--how long are they constrained? Only in the initial combustion? For a time after the burst?
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Old July 7th, 2020, 09:31 PM
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Quote:
Originally Posted by BRover View Post
IIRC, Blish used it in his "Cities in Flight", book 3? He described it as an explosive with polarized atoms, so that somehow they were constrained to move only perpendicularly to gravity--hence a flat plane (TDX = Two-Dimensional eXplosive, I believe).

Blish wrote:


But--how long are they constrained? Only in the initial combustion? For a time after the burst?
I would say from the moment of detonation until such point where gravitational forces reduce to less than what might be called effective levels, say 0.25 standard G? That sound reasonable?
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Old July 7th, 2020, 09:43 PM
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Originally Posted by Redcap View Post
I would say from the moment of detonation until such point where gravitational forces reduce to less than what might be called effective levels, say 0.25 standard G? That sound reasonable?
Maybe. Or maybe when it goes boom (flatly), the polarized atoms go off--but after a collision, there is a chance that they depolarize, and can then be scattered anywhere? That could limit the size of the explosion--once scattering allows the blast focus to dissipate.

Does anyone have a few TDX plates so we can run some experiments . . . ?
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Old July 7th, 2020, 11:30 PM
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Quote:
Originally Posted by BRover View Post
Maybe. Or maybe when it goes boom (flatly), the polarized atoms go off--but after a collision, there is a chance that they depolarize, and can then be scattered anywhere? That could limit the size of the explosion--once scattering allows the blast focus to dissipate.
Hmm. Interesting thought. Is there any existing science on the depolarisation of 'stuff' due to explosive projection/propulsion?

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Does anyone have a few TDX plates so we can run some experiments . . . ?
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  #18  
Old July 8th, 2020, 01:14 AM
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Redcap, I'm thinking maybe Mythbusters? If it has anything to do with cool explosions, they will know--or can figure it out . . .
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  #19  
Old July 8th, 2020, 05:07 AM
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Quote:
Originally Posted by BRover View Post
Redcap, I'm thinking maybe Mythbusters? If it has anything to do with cool explosions, they will know--or can figure it out . . .
Peering over spectacles with a raised eyebrow...

Young man, you are blessed indeed that I did not have a mouthful of coffee when I read that
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  #20  
Old July 8th, 2020, 12:38 PM
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Quote:
Originally Posted by Redcap View Post
Peering over spectacles with a raised eyebrow...

Young man, you are blessed indeed that I did not have a mouthful of coffee when I read that
Not exactly young--I was playing CT in college in the '70s . . .

I got a fresh pot for you.
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