A slow-motion video at 82,000 fps examines what happens when a golf-ball-sized lead ball hits you in the head at supersonic speed
YouTuber The Slow Mo Guys, who shoots various things with a high-performance high-speed camera, has released a movie that shows 'an armored car and a ballistic gelatin head model shot with a golf ball or a lead ball' at an ultra-high frame rate of 82,000 fps.
The huge gun in front of The Slow Mo Guys is a shotgun called a ' punt gun ,' which was used in the days when commercial hunting of waterfowl such as ducks was possible. It was made to shoot down a large number of waterfowl with one shot, and has a caliber of 1.68 inches (about 4.3 cm). Of course, it was not something that a person would hold and shoot, but rather it was fixed to a boat and fired like a cannon at that time.
Golf balls are just the right size to be loaded into a gun case, so they fire them at the armored vehicle behind with a punt gun.
The punt gun is mounted on a wooden slide.
The reason it is fixed to the slide is to absorb the recoil when fired. Below is the state immediately after firing.
You can see that the punt gun is thrown back about 1m due to the recoil of the impact.
If you look at the muzzle of the gun immediately after firing, you can see that the golf ball is shot out at an incredible speed.
Immediately afterwards, the muzzle flash from the burning propellant instantly covers the screen.
Footage taken at 82,000 fps near an armored vehicle. Multiple golf balls fly toward the armored vehicle.
A golf ball hits an armored vehicle. Sparks flash for a moment.
The golf ball shatters into pieces, but the armor does not appear to be penetrated.
Comparing the images before and after the impact, we can see that the impact of the golf ball caused a large dent.
Naturally, the golf ball's outer shell was damaged and the inner core was shattered.
After that, they fired golf balls at the car several times, but the armor did not penetrate. However, the car used by the special police was completely destroyed.
Next, a ball of lead about the size of a golf ball, weighing one pound (about 453.6g).
Then, we prepared ballistic gelatin to resemble a head.
The ballistic gelatin is much smaller than the armored car, and there is a possibility that a shotgun will not hit it, so it is set closer to the armored car. Two drums are placed behind the ballistic gelatin.
Firing. Although it's obscured by the smoke, you can see the ballistic gelatin exploding spectacularly.
The Slow Mo Guys go to see what's going on. All the scattered pieces are pieces of ballistic gelatin, but since red parts were used inside the ballistic gelatin, it seems to have been in a pretty grotesque state, and it's been blurred because 'YouTube's terms may be bad.'
Of the drums behind him, the blue one at the front had a large crack caused by a lead ball piercing it.
There are also signs of penetration on the white drum behind it.
Ballistic gelatin immediately after firing a punt gun. The face is lit orange by reflecting the light of the muzzle flash.
The lead ball lands. Sparks fly when it hits the head.
The lead ball destroyed the skull.
It's a little hard to see, but you can see sparks coming from inside the head, probably because an impact occurred internally.
The lead ball then penetrates the head. Because the ball travels faster than the speed of sound, it creates a shock wave, which causes the head to break apart from the inside along the shock wave, expanding into a trumpet-like shape.
And the shock wave completely crushed his head.
The Slow Mo Guys commented with satisfaction, 'It was the coolest thing I've ever seen, it was so amazing. I don't know how much energy there was in it.'
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