|
Author
|
Topic: multiple SC's
|
rc
Bottle Washer
Member # 1168
Rate Member
|
posted September 13, 2002 06:19 PM
I searched the site and couldn't find anything related.
The same kind of method is used in some nuclear weapons. They use some explosives around the uranium(or whatever i'm not an expert at nuclear warfare) in order to achieve the critical mass. Also after reading nbk's topic "Multi-Point Initiation and Asymetric Effects" i become sure this may have some use in making one's way into safes(btw. how is your project DBSP?)etc.
By placing several SC's on top of the target or around it you will get much better results than using just one. Since when using just one there is always an espace route for the shockwave but when using more than one the shockwave is still as instant and strong(if not stronger) and lasts longer. The distance would be the same between every SC and the target. The initation must be the hardest part for an amateur but like nbk's thread states there can even be 3 points of initation in same piece of explosive. If the top of each SC is 10cm away from the target and they are 7,5cm away from each other we'll want every SC to detonate in period of 1 of 300000 seconds(the explosive's VoD 8000m/s) So is there anyway more than 5 SC's could be detonated at that range? without any hi-tech of course.
And if there are patents about the same subject post them please.
[ September 13, 2002, 06:22 PM: Message edited by: rc ]
--------------------
Ignorance has killed also the Wise.
Posts: 31 | Registered: Mar 2002
| IP: Logged
|
|
EP
Researcher
Member # 660
Member Rated:
|
posted September 13, 2002 09:12 PM
Maybe I'm just clueless about HE's (quite possible), but I don't see why you couldn't just use detcord. With such short distances if they are all connected to with detcord they should all go withing a tiny fraction of a second.
--------------------
Homemade/improvised pyro, pretty basic stuff. Also lots of pics, videos and stories.
http://krimzonpyro.com/ep/
Posts: 297 | From: USA | Registered: Apr 2001
| IP: Logged
|
|
Madog555
Researcher
Member # 993
Member Rated:
|
posted September 14, 2002 10:10 AM
it wouldnt be quick enough EP, by the time the det cord got to the next charge the first one would be at least half detonated.
haveing all the detonators on the sphere of HE was a vital thing to the makeing of the "Fat Man" type bombs.
--------------------
Most people outgrow their pyro tendencies, we are the ones whose tendencies outgrew us.
Posts: 317 | From: USA | Registered: Sep 2001
| IP: Logged
|
|
Anthony
Moderator
Member # 72
Member Rated:
|
posted September 14, 2002 01:58 PM
Ok, you could use electric dets in each charge, switched together, but the inconsistancy of homemade bridgewires would probably mean not all the SCs detonated at the same time.
The best way is with detcord, as mentioned, but you don't daisy-chain the SCs with the cord. Instead you run an equal length to each SC, join the free ends and det with a cap. Even with homemade detcord it should be fairly consistant and set of the SCs at the same moment.
Posts: 3259 | From: England | Registered: Sep 2000
| IP: Logged
|
|
xoo1246
Sr. Researcher
Member # 1089
Member Rated:
|
posted September 14, 2002 02:51 PM
I wouldn't put the SC:s on top of each other, then the top SC's jet woud have to penetrate the the detonating lower SC, wich would be like penetrating reactive armour.
--------------------
"Propaganda is to a democracy what violence is to a dictatorship."
"The market knows the price of everything but the value of nothing."
Posts: 535 | From: Sweden | Registered: Mar 2002
| IP: Logged
|
|
rc
Bottle Washer
Member # 1168
Rate Member
|
posted September 14, 2002 03:54 PM
No, not on top of each other but all pointing towards the target(same distance to target and next ones' sides). Imagine how big pressure and heat could produced by having like 40 SC's in shape of a half circle. The distance to the target could be 15cm and each SC would be 10cm*7,5cm(lenght*diameter)and have 70-100 grams HE in it. The target whatever material it is would melt or at least shatter. The profit compared to just one SC having the same amount HE is that shockwave hits the target from every possible direction making not sure rude damage but more accuracy. When the target is let's say a very big and complex lock the shockwave from multiple SC's shatters the whole lock while one big SC just blows a thin hole through the lock and maybe little bend the door but nothing else.
[ September 14, 2002, 04:10 PM: Message edited by: rc ]
--------------------
Ignorance has killed also the Wise.
Posts: 31 | Registered: Mar 2002
| IP: Logged
|
|
EP
Researcher
Member # 660
Member Rated:
|
posted September 14, 2002 04:48 PM
What Anthony said is what I meant. Let's see if I can make a pretty picture:
code:
--------sc
/
##det##---------sc
\
---------sc
edit: there we go...now it shows up right...
[ September 14, 2002, 04:49 PM: Message edited by: EP ]
--------------------
Homemade/improvised pyro, pretty basic stuff. Also lots of pics, videos and stories.
http://krimzonpyro.com/ep/
Posts: 297 | From: USA | Registered: Apr 2001
| IP: Logged
|
|
Anthony
Moderator
Member # 72
Member Rated:
|
posted September 15, 2002 07:06 PM
To be picky, it'd be more like:
code:
__________sc
/
det##-------------sc
\__________sc
To keep the length of detcord equal.
The problem is see with a host of shaped charges arranged in a semi circle and aimed at a central point, is that most of the charges will strike the target at a less than perpendicular angle, and so may well just deflect off of the target surface.
Posts: 3259 | From: England | Registered: Sep 2000
| IP: Logged
|
|
EP
Researcher
Member # 660
Member Rated:
|
posted September 15, 2002 07:19 PM
I realize I didn't make them exactly equal in the image, but as it was a response to "Instead you run an equal length to each SC, join the free ends and det with a cap." so I felt it was implied.
--------------------
Homemade/improvised pyro, pretty basic stuff. Also lots of pics, videos and stories.
http://krimzonpyro.com/ep/
Posts: 297 | From: USA | Registered: Apr 2001
| IP: Logged
|
|
|
| 
Printer-friendly view of this topic
