Quote:
Originally Posted by Scarecrow
And this is exactly why I haven't even bothered with the formulas or that line of thinking because all you have to do is use some common sense and the laws of physics and conservation of mass and energy to realize this is the case, which I already pointed out. Energy MUST go somewhere, and the BBBMax product logically transfers more of it to a RIGID target because of the rigidity and non-deforming nature of the product.
To understand it without formulas all you have to do is look at a car accident and look at what crumple zones do to understand how energy is dissipated through object deformation. This is why people survive and walk away from 60km/h head-on collisions. The car absorbs the energy though purpose engineered frames that remain rigid until the application of a suitable force from a predetermined direction...
... much like a plastic BB! Wow. who'da thunk it.
|
OMG please let's not go down the "crumple zone" anaolgy. I beg you. This will only create another "round and round" she goes effect. lol.
As i said i am not a ballistics expert but:
(A) from my understanding expanding rounds cause more damage to soft targets because they are able to dissipate more energy over a wider area in a short time span. They lose their energy in the target and reduce the chance of injury to bystanders. German police uses the RUAG expanding round for this reason.
(b) Whereas fully jacketed rounds will penetrate, retain their energy and go right through. Potentially killing/injuring more than one one bystander.
Mcguyver -
you are right. The rounds you describe penetrate because they are able to hold on to their energy as they go through a target. An expanding round will lose all its energy on the bullet proof vest.
That doesn't mean they can't kill you. Trauma caused by non penetrating rounds may very well cause lethal internal injuries. Imagine if you will a non penetrating shotgun slug hitting your vest in the chest vs a tungsten round actually penetrating.
That is why the US FIJ actually measure trauma before certifying certain levels of balistic vests. I believe level IIIA vests are theoretically able to allow you to survive a .44 magnum impact (with no penetration) by absorbing the energy before it causes lethal trauma.
If we use that analogy (probably way over the top) then hard bbs will not transfer a lot of energy to the target. They will lose it as they ricochet off a wall or off a person. Soft bbs will flatten and lose their enrgy into the target with (comparatively) less energy left to ricochet or bounce off people.
Now the amount of energy in both cases is probably extremely small and would make little difference.
If we brought our reasoning to an extreme and we were able to measure that, then i think there would be a difference between the energy absorbed by a soft target bewteen a hard vs soft bb on a target.
PICTURE - this is a picture of what a Simunition FX (
www.simunition.com) round can do to a full face goggle on full auto from 3 meters!
These rounds are 100% made of soft plastic and filled with paint.
That is 5 to 7 joules of power for each of the 15 rounds that impacted!
Simunition is used in force-on-force (people against people) training all over the world. And has been since the early 90s (invented in Canada by Canadians!).