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  • Gav: Today, we're near Uvalde.

  • I'm about to fire a tank.

  • Fire!

  • - Oh! - Whoa!

  • Gav: That was intense.

  • Dan: It blew me away.

  • It's outpacing that shockwave.

  • Dan: Oh, there's a shockwave. You can see the shockwave.

  • Gav: I think that's some of the coolest footage I've ever seen.

  • What is this?

  • It's my baby. Fire!

  • It's an absolute war zone.

  • ( exhaling )

  • Well, that was, honestly,

  • some of the most insane high-speed footage I've seen.

  • I think my brain's just about recovered

  • from the shockwaves of that.

  • - It was loud. - It was loud.

  • The D20 was loud.

  • Three, two, one, fire!

  • Did you hear that?

  • That was one of my most fun days I think, actually.

  • - Yeah? - Firing a tank is awesome.

  • When I was a kid I always wanted to know

  • what it'd be like to be in a tank.

  • So we're inside the Sherman right now.

  • It's pretty cramped.

  • It would have five people usually.

  • You got the driver and the co-driver.

  • You have a commander, the gunner's seat,

  • and you'd also have a loader

  • whose only job is to load the gun.

  • This here's the breech, which is where you'd load the ammunition in.

  • So you have to punch it in with your fist

  • and quickly remove your fist,

  • 'cause this part will come across and lock in

  • and then you can fire it.

  • I can't imagine, especially with five people in here,

  • what the change in pressure must be like

  • when this thing's getting hit or shooting.

  • Actually being inside the tank,

  • you get much less of an effect when you're firing it.

  • It doesn't feel as beefy.

  • Because you're outside, you have all that pressure.

  • Whereas inside, you don't really,

  • 'cause you got that breech protecting you,

  • and you got steel all around you.

  • You know, people overuse the word,

  • - but it's awesome. - Yeah.

  • - It's very cool. But how do you drive it? - Yeah.

  • - There's no wind screen. - That's fair.

  • Is there a steering wheel? Like, what's going on?

  • I actually would-- I have no idea.

  • What even are the controls? Pedals, buttons, levers?

  • - Yeah. - I just assumed it was a thumbstick

  • - kind of controller. - Of course you did.

  • So we took the opportunity

  • to learn how to drive a tank.

  • I'm up in the tower.

  • Okay, I'll try not to crash or do anything too rash.

  • Yeah, try not to bend the thing.

  • All right, so to start it up, just click it.

  • Down, yep.

  • Very satisfying.

  • We're gonna be heading toward...

  • Yeah.

  • Yeah.

  • ( man laughs )

  • Perfect.

  • A little shopping--

  • No. Okay.

  • Is it fun to drive?

  • It's pretty cool.

  • - You just have these two levers. - Think I could drive it.

  • - I think you could do it. - Yeah?

  • I think that even though you can't even drive a car,

  • I think you could drive a tank.

  • - Don't have a driver's license. - I think it's easier.

  • Well, now we all know how to drive a Sherman tank

  • - in an emergency. - Or a zombie apocalypse.

  • Or a zombie apocalypse.

  • Next up, to help us learn more about how a tank works,

  • we have an ammunition technician.

  • - Dan. - Hello.

  • - Thanks for coming on. - My pleasure.

  • What could you tell us about the tanks that we were in?

  • Well, the one we just drove, that was a jumbo.

  • There was only 250 of them ever made.

  • And you run us through what actually occurs in the tank when it fires?

  • I can. This is the projectile

  • that was fired by the tank itself.

  • It's about 15 and a half pounds.

  • Can't really relate to that.

  • - It's over a stone. - Yeah, it's the equivalent

  • of three whole bags of flour.

  • What would you rather get hit by?

  • This or three bags of flour?

  • Well, I mean, probably this,

  • but at that sort of speed,

  • either one would probably do some damage.

  • That would just be a lot more dusty.

  • - Yeah. - Poof!

  • So what happens is,

  • if I lay it down on the side here,

  • imagine here we've got the cartridge case.

  • What happens when you fire the tank

  • when I was pulling that little string,

  • a firing pin was impinging onto the primer

  • and that was igniting the propellant

  • inside the cartridge case.

  • That propellant is hitting the base

  • of the projectile here.

  • You see this part here? This is called a driving band.

  • This is copper.

  • - So this is softer. - This is softer.

  • So if you look down the barrel of the gun,

  • you'll see the rifling like twisting grooves.

  • And because this is slightly wider

  • than the projectile itself,

  • the copper engages in the rifling of the barrel.

  • And that then imparts a spin on the projectile.

  • So this little strip is the reason it's coming out like this.

  • - Yeah. And I'll show you what I mean. - Okay.

  • This is one that we've previously fired.

  • - Obviously-- - Can you guess which has been fired?

  • Yeah, we dug this out of the ground

  • and you can actually see these individual grooves here

  • are the copper that have gone through the rifling there.

  • This engages in the teeth of the barrel

  • and then causes the projectile to spin when it comes out.

  • Every ten inches it travels,

  • it's done a complete rotation.

  • So to clearly illustrate what I'm talking about

  • we can just see the footage.

  • This is my favorite shot.

  • Gav: So almost as it travels the length of itself,

  • it's coming round on a full rotation.

  • - Dan: Yeah. - Gav: So if it wasn't spinning,

  • that would just be tumbling through the air.

  • And you can definitely see the rotation from the rifling.

  • Dan: It's like an American football.

  • When you throw one, you spin it

  • - and it stabilizes in flight. - Yeah.

  • So, obviously, 1,700 feet per second

  • - is faster than the speed of sound. - Yeah.

  • Which is why we've got these bow waves you can see in the air.

  • We actually got very lucky with the fact that this is,

  • you know, it's a gradient from blue to a darker color.

  • You can see it very clearly

  • 'cause you got two colors coming together.

  • Which I've never seen before

  • with, like, naked eye, obviously.

  • That's very cool.

  • Holding it, and it's so dense.

  • It's like, wow, that is seriously damaging.

  • That one was 15 pounds,

  • but the one we fired from the 152 mil

  • D20. Hold this.

  • - There you go. - Yeah.

  • That's a lot heavier.

  • It's about half your weight I think.

  • This shell actually comes out really fast

  • even though the way it defeats armor is very different.

  • This used the power and speed to penetrate the armor.

  • Whereas this has an explosive charge in it,

  • which is what damages it.

  • It used a completely different method

  • to penetrate the tanks.

  • And we actually found some of the remnants.

  • We did.

  • We dug this out of the earth bank in the back.

  • - So this is our one. - Yeah.

  • Just crumpled.

  • The force that has to do that is mental.

  • Well, thank you very much, Dan, for teaching me

  • - a lot about how tanks work. - My pleasure.

  • Well, hopefully you enjoyed that episode. I did.

  • Feel free to subscribe to the Slow Mo Guys over here,

  • and make sure you check out other episodes

  • of "Planet Slow Mo".

  • - What? - Nothing.

Gav: Today, we're near Uvalde.

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タンクの運転方法 (How to Drive a Tank)

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    林宜悉 に公開 2021 年 01 月 14 日
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