The helmet’s ability to deflect a round without allowing it to penetrate the skull is the primary objective of the army helmet. Obviously the late model, Kevlar reinforced helmet is far better at protecting a soldiers noggin from a round than the old steel ww2 helmet.

@triggerfish4744

Жыл бұрын

It’s actually to prevent shrapnel from killing soldiers

@TheCaptainmojo1973

Жыл бұрын

@@triggerfish4744 that too

@haakoflo

Жыл бұрын

@@triggerfish4744 Those are both high velocity, low momentum impacts, though. In both cases, the aim is to protect from penetration, ideally by deflecting, secondarily from simply stopping a projectile. For this, hardness and strength are required. If you're hit by a dropped brick (or heaver tool/construction material) or if you fall down from a roof, the goal of a helmet is more to act as a cushion that will absorb some of the impact, and spread the rest out over some time, to minimize the acceleration of the brain and neck. For that, a softer and more deformable helmet is optimal. If construction workers started wearing army helmets, chances are that injuries and fatalities would go up.

@ge0arc244

11 ай бұрын

@@haakoflo You have some FACTS correct yet some are wrong, you are only making an assumption on Fatalities and Injuries going up if construction workers wore Army Helmets instead of Construction Helmets. Cost and Weight are the Real Issues. Army Helmets are designed to stop or deflect: High Velocity, High Momentum Impacts not what you said about (High Velocity Low Momentum Impacts: these words make no sense used this way) but they will work equally well stopping a brick from cracking your skull or a dropped wrench. Other than added weight and cost an Army Helmet is perfectly fine to use as a Construction Helmet. I understand what you are trying to say about cushioning and Absorbtion of High Velocity, High Momentum Impacts but the harder the shell of the helmet the better, the cushioning effect comes from the support structure underneath the helmet not the actual deformation of the helmet. You want the helmet to keep its shape during impact NOT bend inwards towards your skull and brain that will hurt or kill you, my friend.

@haakoflo

11 ай бұрын

@@ge0arc244 Bullets are examples of high velocity, low momentum projectiles. A bullet moving at 1000m/s weight 4g has only a momentum of 4kgm/s, and this is fairly high energy bullet. For comparision, a 1kg brick moving at 20m/s has much higher momentum (20kgm/s), but much lower velocity and also much lower energy. Both the bullet and brick have more than enough energy to kill you, but they do so in somewhat different ways. The bullet depends on hardness, velocity and energy to enter the inside of your brain, and deliver the energy where it does the most damage. The brick can do that to (but only barely at that speed). Much more dangerous though, are the G-forces it exposes you to. First of all, you need a helmet that spreads the momentum transfer from the brick to your head out as much as possible in time, and as evenly as possible. For something like the brick, that may have to be several cm to keep you alive. (You don't want to expose your brain to 500+ g of acceleration). Against the bullet, you need 1/5 of that or less (since the duration of the impact will also be much lower). Also, if the impact is ellastic, meaning the brick bounces back at the same speed it came with, you will need up to twice the travel distance, since the momentum transfer is doubled. It's generally very hard and uneconomical to make helmets able to deform several cm while both absorbing the energy of the projectile (not reflecting it) AND not have the deformation being permanent. Another example of the same principle: Modern cars are built to deform during a collision, to spread out the impact as much as possible in time. The optimal softness depends on the length of that front area. Too hard, and the compression will be insufficient (at the max speed where passengers can survive). Too soft, and they will end up with the engine and wheel going through their body. Now, I'm neither a soldier nor a construction worker, but I do have a postgraduate physics degree....

Most helmets are not designed with being squished. A fair test is with heavy or fast blows or even a gun round. Very few people wearing them expect to have their heads slowly crushed.

I was just about to get myself a hydraulic press and try this at home, thank God i saw the warning in the beginning of the video

Old is Gold.

го такой же эксперимент, только с касками из разных армий мира

so i can dress like its world war 2 if a building is coming down on top of me got it

Nice video,

So you can be alive until: - Workers: 240 kg - Police: 130 kg - Helmet 2008: 500 kg - Helmet 1968: 2000 kg - Helmet 1940: 3000 kg

@m.b.82

Жыл бұрын

Lol

old is gold

The police helmet kept its shape the longest.

Да в общем-то шлемы предназначены для нейтрализации экстремальной единомоментной УДАРНОЙ нагрузки а не постоянной

عالی

super😁😁😁

Bun dar când îl porți pe cap ?????? atât Laszlo din Timișoara

8:25 so the old WW2 steel helmets are stronger then the modern Kevlar helmets.

@MasterBlaster3545

Жыл бұрын

I don’t think anybody will survive much more than a 500kg weight landing on top of them anyway.

@lexavlogs7149

Жыл бұрын

@@MasterBlaster3545 that nothing

@omnihein9322

Жыл бұрын

Doesn't stop any concussive force though.

@aaronbest747

Жыл бұрын

@@MasterBlaster3545 ya, it would probably break your neck lol🤣

@SeriousApache

Жыл бұрын

and also heavier

А точно да маладец уменя каски после реформ другого образца сплав на подобие титана проверять тоже нужно будет.

👍

Omg, old is gold

Малой чего не комментируем. А карбон крепкий материал вобщем-то каски будут неимоверно прочным лёгкими.

True test would be to fire a bullet at them. They weren't made to have a building fall on them.

Just proves the saying, they don't make them like they used to.

What is the number of kg of pressure supported per gram of helmet ?

واو

If the military or police helmets where hit with max down force it would break the neck of the wearer.

@jesse_ian5619

Жыл бұрын

Yea I feel people are getting caught up in the numbers. Theres no need to have helmits withstand that much force. Also, its possible the newer helmits absorb/dissipate the force away from the wearer. Kind of like the crumple zones of cars. This is purely speculation though.

@timbuckingham6734

Жыл бұрын

@@jesse_ian5619 My brother was part of a hydro safety team he made a picture of a super safe helmet sitting on the shoulders no head visible the body has limits.

так вот как кепки делают.

Добавьте сюда еще ту что использует и нато и новую российскую из советского пластика и бумажной наклейки под «карбон»

Уменя из хорошего материала наподобие титана токо лучше и намного конфорнней прикинь технологии как мы швыдко развивается прогресс.

Should have put some heads in them 🎃🪖

Осе СССР оце каска клас со стали.

The police and army helmets would be better tested by shooting them seeing as that there main function not having 200 tons pressing down on them

No, You can’t destroy a WW2 army helmet. That’s an awesome antique. That should be a war crime. Although you’d probably destroy a civil war helmet if the made them and you got it.

@jesse_ian5619

Жыл бұрын

Examples of war crimes would be the killing of civilians or the use of chemical warfare. I understand the importance of preserving history but to equate breaking an old helmet to war crimes is a bit much lol

You tell that you are in the United States. But why are you testing Russian helmets?

worthless test, helmets are designed for impact

Trust the helmets made in 🇺🇸 ! Not 🇨🇳

@swilleh_

Жыл бұрын

be careful to not say that you don't believe in god or in freedom or otherwise that helmet will kill you

These videos must NOT be from the USA. Just sayin'.

👍👍👍👍👍🤝🤝🤝🤝🤝🤝🎄🦠🎉🎊🥂🍾