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Hang on, now, this is physics law.

Let's say it's a 1g nail and a 100g frog. In order to effect a 100-fold increase in relativistic mass (i.e. starting mass / sqrt( 1 - v^2/c^2) ) the velocity must be over 99% of the speed of light (it would be 99% if we didn't have to square them).

That's a hell of a lot more than 20 over, buddy. Is there a limit on that fine, or does it depend on the width of the ticket?

Using a mountainside might help with structural integrity, but it's not likely to give much air resistance advantage if I'm reading the math correctly. The 5 highest peaks in the US are all in Alaska and and range from just under 5km to just over 6km. Commercial jets using air resistance/density for lift fly at about 10km and even at 38km aerodynamic lift still carries 98% of the weight of the plane (https://en.wikipedia.org/wiki/K%C3%A1rm%C3%A1n_line)

Air density is halved at 5km compared to sea level, but air resistance doesn't diminish as quickly (due to it being multiplied by velocity squared and drag coefficient), and only becomes irrelevant (for short-term purposes) around 100km at the Karman Line.

If we had a 5km peak in Florida, the lack of logistical costs might make the benefits worth it, and if we could build on one of Equador's 5km peaks, then there's the further advantage of equatorial location for optimal rotational advantage (part of the reason we launch from South Florida)

Steep angle entry. It basically almost slams head on into the atmosphere. All that velocity is turned into a big bada boom.

I may be missing what you're seeing, but it looks legit to me. The cymbals and some of the pads on that side are electronic too. They can also be configured to play different samples on successive hits (or velocities) to further muddle things.

Thing that struck my attention was a couple times he switched from matched to traditional grip and back.

Human terminal velocity is around 120mph when falling in breathable altitudes in a belly-down (flat) position. Pulling in your limbs will get you closer to 200mph, which is roughly what a peregrine falcon hits in its dive and in the ballpark of what a .30-06 round in freefall (ie, after being fired straight up) would reach. Professional speed skydivers fly head-down and reach 330mph. The higher you start, the lower air density and thus higher terminal velocity you get. Felix Baumgartner jumped from 128,000 feet and reached 840mph.

Source: https://en.m.wikipedia.org/wiki/Terminal_velocity

Reply to multiple previous comments:



Re:
"Literally no different from a pistol other than it can have better accuracy and sometimes higher caliber"

.38 (9mm), .40, .45 are the calibers you will see used by police pistols

.223 (5.56mm), .300, .308, are the calibers you will see used by police rifles

Unless an officer is using a personal firearm at work, the pistols should all be higher caliber.

The major difference is muzzle velocity damage.
The pistol cuts a tunnel the diameter of the [expanded] bullet.
The rifle leaves an exit wound multiple inches across, and at point blank will grenade the exit side of the target, painting the wall with gibs.





Re:
"Can you tell me why you believe it's "not a great idea" when the criminals already all have guns too?"

Because police should be there to protect citizens lives, at the cost of their own if needed. (Hence the "hero"/"Public Servant" status they so like to remind us of)

If they protect their own lives, at the cost of citizens if needed, then they become a part of the problem they are supposed to be solving.

Just imagine the uninvolved bystander down the street struck down for no fault of their own.

The better path forward is full head to toe level 4 body armor for police, not heavier police firepower in packed suburbs.

That way they have the option to hold fire and assess the situation without shitting their pants and hosing the place down with lead "just in case, so they minimize the risk of getting hurt".

Full L4 body armor means that when things like the VT shooting happen, the police don't pitch tents outside and wait for SWAT (who actually has armor) to show up while people are likely getting killed inside.

Full L4 body armor means that when police open a door to a bathroom with an intruder inside (or a vacuum), they don't have to be thinking "kill or be killed".





Re:
"You are assuming it's a high velocity rifle. It's likely only 9mm, meaning minimal impact and penetration"

The video shows shots of the rifle magazine. It's not a 9mm pcc (pistol caliber carbine) magazine. It's the standard form factor. Meaning it is likely to be one of common the off the shelf calibers for that form factor :
.223/5.56
.300 blackout
6.8 spc
.224 valkyrie
6.5 grendel
None are 9mm. And other than a subsonic .300 blackout variant (used with suppressors/silencers), all pack a world more hurt than a 9mm.






It's true that a faster/heavier round will pass through more walls, and more houses.

Not sure it matters though, as 9mm ball will go through plenty of sheetrock layers, and rifle ammo stands a chance at fragmenting on impact with obstacles.
Which goes farther for any given shot will depend on what each one strikes along the way, and if it's bullet is of type FMJ/ball or HP or frag or penetrator or whatever.

-scheherazade

You are assuming it's a high velocity rifle. It's likely only 9mm, meaning minimal impact and penetration.

A .40 cal pistol with hollow point rounds can do exactly what you describe as well. Just because it's a "rifle" doesn't make it any more deadly or dangerous.

There's a very big difference between a pistol round and a high velocity rifle round. The rifle could easily penetrate a several typical suburban houses and still kill someone down the block in another house. A pistol (or shotgun or sub machine gun) isn't nearly as likely to do that and is just as effective for killing folks that need killing at close range.

I assume the officer is trained on it and knows that, but if folks start shooting, things tend to go wrong.

Yeah, I saw something that suggested this was filmed in July, so you'd think there was more information. All the news I can find on it, just report about the "viral video", with no results on when and where for sure. You'd think that the company itself, or people there that day, would have seen it gone viral and put info out by now... though unless it was the company itself, it'd be harder to vet.

I'd wager the driver was okay in the cage, might have broke a bone or two, but otherwise was okay. The guy in yellow on the right would be the bigger concern, as he was buried. Near the very end you see somebody in black making a run across the far right as the last section collapses.

The crazy thing is, the shelf was barely hit. You probably hit it harder when putting pallets up. It must have been the perfect combo of angle and velocity, then add to that the tension on the legs given the way it was stacked and voila, disaster.

Meh, I buy it. He has to work within the limits of the tensioner, and how to get the velocity across the head reasonable and consistent seems like a hard problem to solve. I think there's probably more going on than just hooking some reel-to-reels up to a mixer, and it would be very interesting to know how he does it. Neat, though.

ed:
Could be he's just getting clicks and pops from some of the recorders and feeding that into an electronic drum trigger module.

I've always thought Assault-style rifles are just rifles.. no more no less... Just looks like it belongs to a soldier.

This video suggests that assault-style rifles are worse than hand guns.. Not necessary is the AR15 more deadly than a 9MM or 357?

Would think mass and velocity / distance are the key things to think about when doing damage to a body.



I don't own a weapon and never did.