Gav & Dan are at a tank range using the latest and greatest in projectile tracking technology. Combined with the Phantom cameras, they get some absolutely surreal looking footage.
I love Dan's reaction at 14:22 he's genuinely speechless but you can clearly see what he's thinking. "Duuude, did you see that? That thing went off course".
@@TheRobo I still prefer this shot. The Schlieren is cool but it's kinda cheating in a way, you can see a cough or a sneeze with it. The shockwave from the tank shell was visible without it, and that's cooler IMO.
Since finding corridor crew, I can't stop seeing how applicable all these videos can be ~~ they've even done shots on black backgrounds from every angle. I do the music and audio end of it all, but am fascinated by y'all's side
I'm also a vfx artist, love this channel but, it shows us how fake the real thinks look like... I mean the cracked glass video looks like they animate a mask without feather of texture map, the same here with the "bullet" oscillation... if we do the exact same thing, the director or the supervisor will say "sorry guy, looks fake!" I love it, it's a fun thing, same for a simple smoke rising up, there is a dark mate line around in real life, for vfx, not good hahahah
@@1001digital Those are the property of the Ukrainian army technically, much to the dismay of the farmers. I heard one guy was rather miffed when they came over to pick them up, he was hoping to hoard at least one of them.
@@davidqbs Actually exactly what I was thinking. Just before the first shot I had to pause the video and analyze his ear protection. Definitely should've had double protection with the tank!
So glad I was warned about the product placement here. Otherwise I think I may have been unduly influenced into buying a Sherman tank over its competitors! This way, I can keep my tank research neutral, looking only at the specs of each tank rather than relying on the emotional attachment this video may have produced
@@hallopeepz yeah i noticed too, i think its the blast wave from the gun, the front and aft wave on the shell are the supersonic waves because its going supersonic. If you look closely, you can even see some more smaller shocwaves in between the front and aft wave, those are from the shape, so the things that are sticking out (dont know what they are called) also give some shockwaves.( its best noticable with the blue sky as background)
I watched this when it first came out and have come back to re-watch it a dozen or so times since and it gets better every single time. Absolutely amazing footage. Well done Gavin and Daniel.
I was 16 yrs old and deer hunting with my father. It was raining and it was almost ready to snow. The drops of rain were like a fine mist. A nice buck stepped out an I fired first followed by dad's shot. I swear it was like traced from the tip of the barrel to impact. Each drop of rain exploded as the bullet traveled through the air. It was awesome! Thought I would share cause that was 50 yrs ago.
8:30 the "V" that you see are the Mach lines, that typically appear on edges of objects moving above the speed of sound. You can actually mesure the speed of the shell just by mesuring the angle of the V.
I'm not sure if the fact the angle of the "V" appears to be getting more obtuse throughout that shot is because the round is decelerating or if it's just the angle of observation changing as the camera (mirror) tracks it.
@@dkcrogue Lower the speed, wider the angle, you are right. The shell looses speed but on that short of a distance, you wouldn't really see the effect on the angle. So yes i'd say that the angle of filming is playing a big role there
The speed of sound there is about 343 meters/second = 1125 feet/sec. At 2000 to 2500 feet/sec, the shell was going about Mach 2, twice the speed of sound. This results in a significant sonic boom wave. And the light going through that wave is refracted by the different densities of the air in the different parts of the shock wave. Fun, thanks.
Not impressed with wabble and then yaw of the Sherman tank shell so I would like to compare it with a 75 mm Panzer 4 shell ! I would expect an almost perfect flight !
The sonic boom is caused by cavitation or atmosphere being pushed away and then collapse back in on itself to fill the void. Whats interesting is that the wave stayed a cheveron shape even when yawing out of control
Imagine that one photon that came out the sun, travelled 8 minutes, came into the earths atmosphere, hit a wwII tanks' shell flying through the air, bounced off, hit a spinning mirror, went into the camera lens, and was absorbed by the sensor which was only open for about 1/57,000 of a second because of the camera's shutter
Captain America Not to mention the 100,000 years it takes that photon to make its way from the Sun’s core to the photosphere where it finally begins said 8-minute earthward journey.
A few months ago: Smarter Every Day did an analysis of civil war era cannon shockwaves, filmed at 10-30k fps. A month ago: Fullmag fires a tank round into a Land Rover Discovery, filmed at 60k fps. Today: THIS. I feel like we’re in a slow motion entertainment arms race, with these RU-vid heavyweights democratising this cutting edge camera tech for the masses.
I’ve been watching you guys on and off over the years, always liked your videos. But this? This is maybe one of THE most awesome RU-vid videos I’ve ever seen! And the still at 14:33, ridiculous!
"Thankfully, there's nothing out there." Meanwhile, on the next episode of Forgotten Weapons... "Hey guys, thanks for tuning in for another episode of Forgotten Weapons, I'm Ian McCollum and today we're taKING ENEMY FIRE! INTO THE TRENCHES LADS!"
The M4 Sherman is not anymore in production but maybe that D-20 howitzer is still on sale somewhere, they probably also have an affiliate link for it :'D
Those mirror tracking shots were incredible. I realise it's just software doing its thing, but the concept of turning that mirror so quickly yet with such precision is blowing my mind. The entire thing happens in a fraction of a second and it managed to perfectly track the round. 🤯
I did not expect that result as well, but in hindsight, it makes sense The water melons are, after all, mostly water. Water is kind of good at stopping high speed objects (i believe there are videos of bullets shot into pool/barrel/something watery. And if you don't aim dead center (i.e. there is slightly less resistance on the top than on the bottom because you hit the top half of the melon), it's gonna deflect
Its because of volume. If you had a 75mm thick tin plate filled with water it would pass through the thing about firing into a pool is that the volume of water in a standard 6 foot kiddie pool would equate to passing thru 2 meters of armor. Its not that water is great at deflecting its just that 2 meters volume of any material is very hard to penetrate
It's highly likely that the round got deflected because what you fired was a hollow training HE shell with no explosives, but which was not back-filled with an inert equivalent. If that was an actual HE or penetrator shell, it wouldn't even notice that the watermelons were there. They did that probably to reduce wear and strain on a unique and extremely expensive gun, since there was very little recoil.
Correct! Blue denotes a training round. It was not an HE or even a concrete slug. Usually the projectile mass of medium grade artillery is too much to notice melons. Another reason why they do not use HE is because the Department of Homeland Security does not think that any one person or small groups of persons should be handling explosives of that magnitude. Which is a shame because that would make for some amazing slomo footage. Mist that truck like the melons.
Justin Hingtgen that’s not quite how that works. Same projectile size does not at all mean same gun. The obj 268 did not have a k-20 on it. But it did indeed have a cannon that fired a 152mm projectile.
@@Your_Resident_Redleg Doh! I should've spotted it was blue! Generally means training everywhere around the world, including where I live. Surprising they didn't just fire a solid lug though, for a high end video.
My father was a tank commander in the New Zealand Division Armoured Regiment in Italy. They had the standard Shermans, with the 75-mm gun, which he said was a useful enough weapon, but the game changed when they started receiving Shermans with the Firefly conversion - the British 17-pounder anti-tank gun. They were very impressed with a gun that could destroy anything it was aimed at. When they fired the 75 mm gun, they could stand outside the tank and observe the fall of shot, but the 17-pounder gun's muzzle blast was so colossal that they had to shelter inside the turret when it fired, or be standing further away from the tank than these slo-mo guys were. If they were firing at anything less than one thousand yards away it was impossible to spot the fall of shot because they were still flinching from the muzzle blast when the shot arrived at the other end.
Also the amount of dust and propellant fumes would make it incredibly difficult to see for a few moments, albeit it would make identifying where the shot came from incredibly simple. That and the astronomical flash from the shot as it was fired, the fire from said explosion is why it's called a firefly, because of the intense flames erupting from the barrel of the 17pdr.
@@ch4z_bucks If, when you comment on the "astronomical flash" and "intense flames" from the gun, you are basing your comment on the slow-motion video of the gun firing, it is useful to recognise that, at normal speed, such as when the slow-mo guy first fired the gun, the muzzle flash was so fast it was effectively invisible. My father often spoke of the gun and its different aspects and he never once mentioned the muzzle flash as graphically as you have described it. Do you know for a fact that the "astronomical flash" was why it was called the Firefly? In fact, I wonder if these slow-mo guys were actually firing full-power ammunition because, if they were, they would standing a lot further away from the tank. Look for a RU-vid video, titled, "Was The 17 Pounder the best allied Anti-Tank Gun in WW2?" There is a clip of the gun being fired and the muzzle blast is colossal - far more powerful than in this slow-mo exercise.
@@MarsFKA it was a rumour I heard for the name "firefly" I don't remember the specific source but it was something I had heard before I'd seen this video. I'd never questioned it (mistake on my part) as it made sense and I hadn't heard an alternative.
Fun fact: that somebody was Teddy Roosevelt (although it was his 50-page speech which he had folded twice along with metal glasses case, not just some index cards). When the attempt occurred, he simply told the audience that he had been shot and went on to give a nearly 90-minute speech. When he finally received medical care, doctors concluded that it would be safer leaving the bullet in rather than attempting to remove it, so he ended up carrying the bullet that was imbedded in him for the rest of his life. On an unrelated note: Teddy died at the age of 60. He died in his sleep, for if he had been awake, there would have been a fight.
Let me just say how impressive some of the stuff you pull with these cameras is. Pretty much anyone would have packed up and left after losing the direct sunlight, that's just common sense. But you two just casually knew exactly what adjustments to make to make it possible to get one more shot in. Not just any crew could have pulled that off, that takes skill born of long experience
@Platypus Artist when one attempts to describe scientific principals in an effort to show their intelligence, it's generally a good idea not to use pseudo words like "cuz" nor misspell simple words such as "dense". Also, although you're technically correct, saying that "it was not watermelons that deflected it ( I'll leave out the comma you should've used at this point as I'm quoting you directly.) it was the water in the watermelons" is not exactly the intelligent, yet nuanced point I think you were attempting to make. Although that would make a great defense in court- " I didn't shoot him, I shot the water that makes up appx 60-65% of his body!" I'm pretty sure they'd call that a ridiculous premise. " they didn't shoot that truck!, They shot the steel, rubber and aluminum that the truck is made of!" " They didn't fire that artillery piece, They ignited the nitrocellulose thats contained in the shell, creating rapidly expanding gases which caused the projectile to fly downrange." " They didn't video this in slow motion. they used cameras that take many images in a very short period of time. Which was then electronically stitched together to make a full motion image." I think I made my point.
Mark Rober should do the largest block of ballistics gel and catch one of these rounds and have The Slow Mo Guys film it in a collaboration video. That would be epic.
Imagine how much damage that round could have caused...reflected by freaking watermelons...who would have thought? Next time I build a bombshelter, instead of concrete I just place watermelons around it.
