9 Laws of Physics That Don't Apply in Hollywood

Ant writes "Neatorama lists nine laws of physics that don't apply in Hollywood (movies and television/TV shows). In general, Hollywood filmmakers follow the laws of physics because they have no other choice. It's just when they cheat with special effects that people seem to forget how the world really works..."

Comments

Been there, done that.

[Anonymous Coward]

AKA. Mythbusters.

The "Hollywood special" from a few moths back.

Intuitor

[imaginaryelf]

I've always enjoyed intuitor dissect movie physics for some of the more popular movies.

http://www.intuitor.com/moviephysics/

Steel cases, not steel jackets, IIRC.

[Kadin2048]

I think the ammo you're talking about is not jacketed in steel, but cased in steel. And yes, some people believe it to be significant rougher on guns than conventional copper-cased stuff, but not because of the bullet going down the barrel proper, but due to the damage that the steel case may be doing to the chamber during loading and extraction.

You used to find this stuff under the "Wolf" brand name, and it was mostly made in Russia and some other ex-WP countries. I think Wolf may be trying to move upmarket and has ditched the steel-cased stuff, recently though.

At any rate, the bullets in that stuff were pretty standard at least that I ever saw, but instead of using a brass case, as is used in most Western countries' ammunition, they went with steel cases, covered in some sort of paint and lacquer (assumedly for rust-proofing). There were a number of issues with it, particularly in close-tolerance weapons. First was just the threat of damage to the chamber because it's a harder metal (although I have doubts about this), more significantly was that if you blasted a bunch of it off rapidly, you could get the gun's chamber hot enough to start melting the lacquer off of the cartridges, and over time, build up a layer of lacquer inside the chamber, that would change its dimensions, and lead to feed problems, particularly if you switched back to other types of ammo.

I know a number of people who got burned by the lacquer-buildup problems, because they had AR-15 style rifles with tight-tolerance chambers (the .223 Remington chamber, as opposed to the 5.56mm "NATO Chamber" or the compromise "Wylde Chamber").