Author Topic: Body Armor-- Energy Transference  (Read 1378 times)

Offline Nemo

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Body Armor-- Energy Transference
« on: June 07, 2019, 11:58:36 PM »
Does that count in the soft armor? Dispersed? Absorbed into it? Transferred to the chest/abdomen/back/body underneath?

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  This New Metal Foam Can Stop .50 Caliber Rounds
    June 6th, 2019

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    A newly developed foam made of metal can reportedly stop .50 caliber rounds just as effectively as steel armor.
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Offline Erick

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Re: Body Armor-- Energy Transference
« Reply #1 on: June 08, 2019, 01:04:38 AM »
Energy will always 100% transfer to the body somehow.. the advantage of armor is it disperses it along a large area eliminating or at least reducing injury.
Not sure if this is your question since i know you understand this.

US soft body armor by he way is permitted by spec to indent into the body from a hit. I dont remember how far US spec allows this (I used to know this) but the number of 2 inches comes to my mind.. but am not 100% if this is accruate. I also rember the Euro spec was stricter than the US spec.. in any event still quite  a punch ..

Of course this "indent" does not apply with ceramic armor which will remain stiff or break.... no in between like soft armor
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Offline Kbop

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Re: Body Armor-- Energy Transference
« Reply #2 on: June 08, 2019, 07:45:32 AM »
Nemo,
Erik is spot on.  Think of it this way;
if you drop an egg on the sidewalk from head height, it will break.
if you wrap it in a towel, it won't break when dropped.  That's how soft armor works.
the reason is that the energy is dispersed over a broader area and hits over a longer period of time. (just like a car air bag keeps the steering wheel from messing up your face, in an accident)
A ballistic plate spreads the energy from 7.62mm to the size of your entire chest.  I saw someone take 3 AK rounds to the chest in Iraq.  He hit the ground - turns out, he didn't have a scratch on him.  The plates didn't even crack. 
soft armor - like aramid fibers - spreads it out only over about 15mm-20mm.  enough to stop penetration but not bruising or some soft tissue damage.  The fibers trap the bullet in a stretchy net to slow it down.  Like Erick mentioned it can penetrate a bit - the important penetration is hydrostatic shock - this ruptures cells, a bit like a sonic boom can pop a balloon.

one important note here, soft armor will stop slow velocity hand guns, shot gun pellets or shrapnel but not rifle rounds.  After a hit, the woven fibers can become damaged and aren't able to stop a round any more.  Ceramic plates can stop smaller rifle rounds, but can shatter and become useless after a hit.

Offline JohnyMac

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Re: Body Armor-- Energy Transference
« Reply #3 on: June 09, 2019, 02:05:18 PM »
I have ceramic plates and Kevlar between the plates and me. I set up my chest rig like this because the old MrLockn'Load recommended it. I forget what his reasoning was. Maybe it was to lesson the trauma to your chest. But anyway, that is what I have done.
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Offline pkveazey

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Re: Body Armor-- Energy Transference
« Reply #4 on: June 09, 2019, 03:29:55 PM »
I considered getting plates for my vest but the damn things are heavy and I'm old. I think the weight would be too much to lug around. I bought a Flack Vest and hope that I only get hit buy a handgun round. Well, actually, I hope I don't get hit by any round. I'm told by those who have worn a flack vest that it hurts like hell but it helps.

Offline JohnyMac

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Re: Body Armor-- Energy Transference
« Reply #5 on: June 09, 2019, 03:48:04 PM »
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Offline SemperParatus

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Re: Body Armor-- Energy Transference
« Reply #6 on: June 10, 2019, 08:07:17 AM »
I believe body armor has its place for prepper/survivalist.  Throughout my carrier I have treated many gun shot victims.  Most of these people have been hit with hand gun projectiles but there have been a few from rifles and shot guns.  I have also treated several police officer who wear shot and hit on the body armor.  Modern body armor is a an invaluable piece of gear if you beleive you will be in an environment where you willl be taking fire from an advesary.  The wounds to the victims of gun shots on soft armor are usually minimal with localized crushing tissue injuries and dispersed bruising.  The officers involved have all stated it was somthing like being kicke by a mule.  I talked to one officer who was hit in the chest by a 9mm round wile wearing soft armor with armor plates and he said at the time he though he had been hit but the adrenaline and threat focus caused him to keep fighting and put the subject down.  To his rememberance the only injury was a 3" red spot under the armor.  I have put together several sets of military issue Interceptor level 3 body armor with level 4 ceramic plates for my family to use in the event of SHTF. Each of the Interceptor armored vest includes 8 - 30 round AR-15 mags, IFAK, TK, radio pouch, fixed blade knife and 2 pistol mags. Each of the Interceptor vests weigh 29 lbs complete I have also put together a Black Hawk armored vest with level 4 penetrator ceramic plates.  The black Hawk armored vest includes 10 - 30 round AR-15 mags, IFAK, TK, radio pouch, fixed blade knife and 2 pistol mags. The Black Hawk armored vest weighs 35 lbs.  I also put together a plate carrier with stand alone level 4 penetrator ceramic plates.  The plate carrier includes 4 - 30 round AR-15 mags, IFAK, TK, radio pouch, fixed blade knife and 2 pistol mags.  The plate carrier weighs 30 lbs complete.  Our SOPs state that during a SHTF event security personnel will wear armor and kevlar helmets.
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Offline JohnyMac

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Re: Body Armor-- Energy Transference
« Reply #7 on: June 11, 2019, 08:41:28 AM »
Nice. Thanks for sharing.  :cheers:
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Offline mechmedic

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Re: Body Armor-- Energy Transference
« Reply #8 on: June 11, 2019, 10:11:00 AM »
The interceptor best work.
I just HATE wearing them. Now if I could find the plate carrier I had on the Marine Corps, in a medium, for a reasonable price? I’d be a happy camper.

Offline patriotman

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Re: Body Armor-- Energy Transference
« Reply #9 on: June 11, 2019, 10:45:46 AM »
I am of the mindset that armor is most useful in either vehicle ops or static positions such as check points.

Speaking of transfer of energy, what would be a better steel armor backer: trauma pad or level 3 soft armor?
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Offline CJS06

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Re: Body Armor-- Energy Transference
« Reply #10 on: June 11, 2019, 11:58:35 AM »
Armor is a very big subject that I believe has been done fairly in depth in a previous thread......I may be mistaken.  Armor is really going to depend on what you are doing. In a defensive, vehicle or direct action role hard plates in a dedicated PC are the go to.  If you are patrolling or in more of a recon role then the extra weight and reduced maneuverability may not be what you want. 

I like my LBX plate carrier with Level IV plates.  I am 6"1" 215lbs and use size M plates.  In a defensive or vehicle situation I will also wear a slick soft armor vest underneath.  In a direct action type of situation I prefer just the carrier without the soft layer under.  When patrolling or in a Recce roll I find the extra weight to be a hinderance a ditch the hard armor. At most I wear the slick soft armor with a separate chest rig for my load out (which varies with length of patrol/recon).  Load out is a another hole to run down that can vary greatly.

My LBX plate carrier with plates, tq, Radio pouch weighs in at 11.9 lbs.  I have different load outs for different jobs but my most common is 3 rifle mags. I also have a back panel with a camelback that I add if needed.  My soft armor weighs is at just under 3lbs. 

Chris