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Custom explosive traps - help me with new ideas

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Ravensong

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« on: <10-10-14/2148:15> »
Submitting these ideas to the GM for a Dwarf Merc with specialty of improvised explosives.
Have a few so far, take from SR lore, films, etc. Share your ideas below.

Bouncing Betty:
100 teflon coated steel darts surrounding a brick of c-4. Put in a motion sensor detonator, wrap the whole thing in a layer of rubber,  program it to bounce once and detonate 3ft above ground or at complete stop. Can be dropped by drones, or from stairwells. Damage from blast and from armor piercing shards of metal.

Chain Charge:
Plastique rolled around a heavy duty bike chain. Layer of plastic to cover. At either end of chain is a lock with detonator. When the chain is locked, the bomb is active, goes off in 9 seconds. Perfect for a shaped charge or blowing off an armored skull.

Monowire Claymore:
Set up a monowire line across a hallway. Place claymore with weight plate sensor 6inches away. If someone doesn't see the monowire, and gets cut, falls over sets off the claymore. If they do and step over it, they step on the sensor plate. Either way... ouch.

Tripwire grenade kit:
Quick way to set up grenades with a trip wire that, if tripped, pulls the pin out of the grenade, with minimal delay for maximal effect. Great for stair wells, doorways, and hallways. Also can be rigged above closed doors so that when the door is opened the pin gets pulled.
« Last Edit: <10-10-14/2149:47> by Ravensong »
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Michael Chandra

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« Reply #1 on: <10-10-14/2209:16> »
Better idea for Bouncing Betty, add a gecko layer to the top surface of a piece of explosives. Thing bounces up, attaches itself to the undercarriage of a vehicle, and suddenly the explosive counts as attached and does way more damage.

I'm not so fond of the tripwire grenade kit, since that is possible now but risky at a threshold of 8. Such a kit would take out all the excitement.
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Herr Brackhaus

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« Reply #2 on: <10-10-14/2228:52> »
Run & Gun also seem to have a lot of additional rules for explosives, though I'll admit I haven't read them fully yet on account of how extensive that chapter is.

Having skimmed the pages, I will say that I think the atomizer seems like it could cause some havoc.

8-bit

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« Reply #3 on: <10-10-14/2238:39> »
Having skimmed the pages, I will say that I think the atomizer seems like it could cause some havoc.

Indeed, atomizer disguised as a perfume bottle can set up an explosion that can deal Grade level of Liquid Explosives x 2 Physical damage with only 1 liter of explosives. That takes 1 combat turn to set up. The only problem is that if you are standing within the blast radius, you will take damage as well, albeit at -2 damage value per meter of distance away from the cloud of explosives.

Namikaze

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« Reply #4 on: <10-11-14/0025:35> »
Chain Charge:
Plastique rolled around a heavy duty bike chain. Layer of plastic to cover. At either end of chain is a lock with detonator. When the chain is locked, the bomb is active, goes off in 9 seconds. Perfect for a shaped charge or blowing off an armored skull.

I'm not sure I've visualizing this correctly.  The chain is covered in explosives and plastic?  How is there an other end for the lock with a detonator?  Maybe you could explain this one better.

On the topic of the bouncing betty trap - I like it a lot.  Like Michael, I'd say you could make an anti-vehicle variation that uses a shaped charge with a magnet and gecko grip tape.  The whole thing is then disguised to look like the surroundings (dirt, pavement, whatever) by a cloth, maybe even one with chameleon coating.  The charge then attaches to the first metal object to go over it, and the grip tape keeps it in place.  A few seconds later, the shaped charge goes through the object.

Here's an example of modern-day magnetic mines that have been designed as IEDs (that is to say no production factory makes these things): http://freerangeinternational.com/blog/?p=3099.  Opposition forces have been using these magnetic or limpet mines for decades - I think since World War II actually.  I seem to remember that the US and SAS used "sticky bombs" to blow up German tanks - basically the same premise.  Anything with an explosive directed in one direction, that you can't remove, and it's easy to apply.  You could drive by on a bicycle and toss something like this to a target and blow it sky high.  It's scary, but a convoy of soldiers or well-trained bodyguards are going to keep people away for just this reason.  Hence why putting it on the ground, covered in cloth that can't be seen, is going to be the desired method of delivery.

I've done some work in IED defeat training for the US Army.  One of the things that always struck me as amazing are the physics behind IEDs.  The simplest shaped charge is usually just an explosive submerged in water.  The water directs the blast toward your objective.  For IEDs, the most dangerous types of shaped charges are called Explosively Formed Penetrators, or EFPs.  They direct a blast into a metal that is relatively easy to warp - the whole blast ends up forming this spear-like sliver of metal that has an astonishing amount of power behind it.  This stuff will easily penetrate tanks, and they're scarily easy to build.  The big drawback to them is that it takes some space to actually form the penetrator.  If you had a magnetic mine, it would definitely do a lot of damage.  However, if you could somehow make an EFP that couldn't be detected (and thus couldn't be avoided) you'd have a REALLY nasty way to take out some bad guys.

If you want to read up on the scariest IED I've ever seen, check this out: http://en.wikipedia.org/wiki/Explosively_formed_penetrator
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MijRai

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« Reply #5 on: <10-11-14/1010:31> »
Eh, they're a bit harder to make than that, given the technical skills it takes to make the bowl and to measure/shape the explosives (certainly easier in a world of 3D printers and a Matrix full of nifty plans and the like).  Otherwise, it won't form an effective penetrator, and it won't go through most armor at that point.  Really, the trick for those is to have them set up in a camouflaged pothole or something, deep enough that the penetrator has time to form (which means you need to know the kind of vehicle you're targeting, as the height of something like a Roadmaster will be a lot different than a Bulldog). 
Would you want to go into a place where the resident had a drum-fed shotgun and can see in the dark?

Namikaze

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« Reply #6 on: <10-11-14/1316:26> »
Yeah generally the EFPs that I've seen are usually placed on the side of the road, at a height just tall enough for a MRAP or something similar, but not so tall that it wouldn't hit a HMHVV effectively.  And roadside placement allows for the whole half of the road to be used to give the EFP the distance necessary to form the projectile.

The ones I've seen that have been put together simplistically and effectively are made from a clay pipe and copper plate.  It's scarily easy to put together an effective EFD, even if it's not military grade.
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MijRai

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« Reply #7 on: <10-11-14/1447:20> »
Yeah generally the EFPs that I've seen are usually placed on the side of the road, at a height just tall enough for a MRAP or something similar, but not so tall that it wouldn't hit a HMHVV effectively.  And roadside placement allows for the whole half of the road to be used to give the EFP the distance necessary to form the projectile.

The ones I've seen that have been put together simplistically and effectively are made from a clay pipe and copper plate.  It's scarily easy to put together an effective EFD, even if it's not military grade.

Let me guess; mostly Iraq?  My experience with seeing them (attempted, at least) was the other wonderful sandbox.  Their skill-level over there is a bit lower. 

By the way; the principle effects of an EFP are pretty much exactly how RPGs function, except emplaced instead of launched.  The nose of an RPG has no charge- the tip is a trigger which sets off the explosives in the back, blasting the copper cone into a penetrator.
Would you want to go into a place where the resident had a drum-fed shotgun and can see in the dark?

Herr Brackhaus

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« Reply #8 on: <10-11-14/1517:58> »
<znip> but not so tall that it wouldn't hit a HMHVV effectively.</znip>
You guys drive around in infected vehicles?

Epic HMMWV typo is epic. :D

MijRai

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« Reply #9 on: <10-11-14/1616:54> »
<znip> but not so tall that it wouldn't hit a HMHVV effectively.</znip>
You guys drive around in infected vehicles?

Epic HMMWV typo is epic. :D

Being carried around by Mutaqua is quite intimidating, especially with the mounted 7.62mm machine gun on top. 
Would you want to go into a place where the resident had a drum-fed shotgun and can see in the dark?

Namikaze

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« Reply #10 on: <10-12-14/0033:09> »
Let me guess; mostly Iraq?

Well I've run IED defeat training for both regions, and a few others.  Iraq was DEFINITELY heavier on the EFD front - the Afghan insurgents just didn't have the know-how to make them.  Nasty pieces of work though with RPGs and re-fit mortar warheads.  Fortunately, I don't forsee anything like that taking place in your average Shadowrun game.  Unless your average Shadowrun game is a mercenary unit slogging through Laos.

<znip> but not so tall that it wouldn't hit a HMHVV effectively.</znip>
You guys drive around in infected vehicles?

Epic HMMWV typo is epic. :D

Nice catch!  I must have Shadowrun on the brain.  :P
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MijRai

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« Reply #11 on: <10-12-14/0122:26> »
Well I've run IED defeat training for both regions, and a few others.  Iraq was DEFINITELY heavier on the EFD front - the Afghan insurgents just didn't have the know-how to make them.  Nasty pieces of work though with RPGs and re-fit mortar warheads.  Fortunately, I don't forsee anything like that taking place in your average Shadowrun game.  Unless your average Shadowrun game is a mercenary unit slogging through Laos.


Who knows, maybe I read some of your stuff.  My experience is pretty much solely with Afghaniland, so I got to see the mixture of sheer MacGuyver-level jury-rigging, with the obtuseness and idiocy of some of the folks over there. 
Would you want to go into a place where the resident had a drum-fed shotgun and can see in the dark?

Namikaze

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« Reply #12 on: <10-12-14/0215:13> »
Who knows, maybe I read some of your stuff.

Nah, I never wrote anything but software for the Army.  I built the IED defeat trainer that the Army uses - the virtual stuff.  We took real-world scenarios and put them into a virtual environment to give people the experience without any of the ...side effects.  It was really quite effective, as we could run a unit through our training probably 20 times to every one time they'd be able to do it downrange.  By the time they were done, their downrange training was substantially more valuable as they weren't going into it completely blind.

Part of me writing this software involved doing extensive training in what IEDs were used, insurgency tactics, counter-insurgency tactics, etc.  I felt like I learned more just to do my job than I would need to actually make the simulator work.  But as a result, the simulator is phenomenal.  Actually, if you go to any Army base in the world, you'll find varying degrees of the software I worked on.  The basic level is just a bunch of networked laptops that run the simulation with a mouse/keyboard interface.  The really good stuff involves full-body immersion in mock-up vehicles, firing real weapons that have been retrofitted to fire lasers instead of bullets.  And the REALLY good stuff is over at Fort Riley, where the administrator is a former Green Beret who LOVES to create new mock-ups, like a mock-up Blackhawk for medevacs, simulated flares the soldiers throw, etc.

It's basically all good theater, but in order to make it effective, I had to learn way more about IEDs than I ever wanted to know.  It's scary how easy these things are to put together - which is a great segue back to the topic.  :)  The difficulty for some of the Demolitions tests are a little intense, but it makes sense.  You shouldn't be playing with explosives unless you REALLY know what you're doing, at which point the thresholds start to become substantially more attainable.  I like the idea of having some more pre-generated explosive options, but I still think the basic limpet mine and drone-with-a-grenade are still my go-to choices in Shadowrun.

A little off-topic though: I wonder what sort of defenses Shadowrun has for preventing IED attacks?  I mean, the stuff we have now is pretty damn advanced, so much so that it blows my mind what those DARPA guys crank out.  I can't even imagine half the things they've designed in the last 10 years, let alone what would be possible in Shadowrun's timeline.  Would it be safe to assume that a VIP's vehicle might have some sort of exterior polarization that demagnetizes attached devices?  What about gecko grip?

And to the OP - I know we've been talking a lot about anti-vehicle stuff.  Do you want to focus on anti-personnel options, or anti-vehicle, or both?  Generally anything that's anti-vehicle will hurt people, but might be less effective (smaller, more nimble target).  And the opposite is true if you use anti-personnel munitions on a vehicle (less focused blast, less penetration).

Still, I think nothing beats a good ol' microskimmer drone with a block of C4 on top of it.  Land or sea, the target will likely be destroyed.
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Reiper

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« Reply #13 on: <10-15-14/2207:02> »
One trap I'm working on figuring out the rules for is a low tech shotgun over the door trap. They open the door, string pulls the trigger of a shotgun, shooting whoever is entering it in the face.
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« Reply #14 on: <10-20-14/0501:43> »
One trap I'm working on figuring out the rules for is a low tech shotgun over the door trap. They open the door, string pulls the trigger of a shotgun, shooting whoever is entering it in the face.
Or in the back? The baddies may not be looking for the trap outside your secret hideout, but the old trapdoor in the ceiling marked 'Utilities' can be rigged to swing down, and the sawed-off going off should alert most people inside that unwanted guests are popping in for coffee  ;D
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