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Author Topic: Official Prometheus Website Updated  (Read 21592 times)

Vulhala
Apr 27, 2012, 07:31:58 PM
Reply #75 on: Apr 27, 2012, 07:31:58 PM
I wasn't sure whether it was more for portability. Or both. I know nothing about guns.


chupacabras acheronsis
Apr 27, 2012, 07:49:05 PM
Reply #76 on: Apr 27, 2012, 07:49:05 PM
sawing off part of the barrel won't do much except reducing the amount of speed the rounds can reach a little(thus reducing how far they can go without losing trajectory) and making the muzzle flash into a flametrower. the pellets spread only because of the explosion of the gases at the muzzle.


Vulhala
Apr 27, 2012, 07:52:29 PM
Reply #77 on: Apr 27, 2012, 07:52:29 PM
Thanks. So really it serves no purpose other than to make it easier to conceal?


Eva
Apr 27, 2012, 08:03:31 PM
Reply #78 on: Apr 27, 2012, 08:03:31 PM
Curious: (I don't know anything about gun designs either)

- the inside of a gun barrel is in direct contact with the projectile, yes? So wouldn't a longer barrel reduce the speed of the projectile because of drag?

I assumed the necessity of a longer barrel, was about stabilizing the projectiles trajectory before it leaves the muzzle and thereby aiming for higher precision, not as much a higher projectile velocity...


chupacabras acheronsis
Apr 27, 2012, 08:13:43 PM
Reply #79 on: Apr 27, 2012, 08:13:43 PM
Thanks. So really it serves no purpose other than to make it easier to conceal?

one could say so, shotguns are usually smooth bore so there's no centrifuge force in the shot. but having a smaller length means you have a smaller magazine tube. that's why sawn off shotguns are only a good idea with cheap break actions.

Curious: (I don't know anything about gun designs either)

- the inside of a gun barrel is in direct contact with the projectile, yes? So wouldn't a longer barrel reduce the speed of the projectile because of drag?

I assumed the necessity of a longer barrel, was about stabilizing the projectiles trajectory before it leaves the muzzle and thereby aiming for higher precision, not as much a higher projectile velocity...

the drag actually helps the projectile gain energy. the explosion pushes the round, which, being soft lead, seals it completely against the rifling that spins it(which is what really stabilizes it in flight), all the way down to the muzzle. the longer and tigher it is, the more of the energy will be transfered to the bullet instead of turning into a flame at the end. but it also depends if this barrel is solid enough to direct the bullet; if the barrel is long but too thin or weak it will vibrate and and send the rounds all over the place. that's why you don't see sniper rifles with 2m long barrels.


escroto
Apr 27, 2012, 08:15:40 PM
Reply #80 on: Apr 27, 2012, 08:15:40 PM

I think that's really my only "problem" with the new stuff on the website, dropping the atmosphere processor in in 'Prometheus' doesn't jive well with 'Aliens' where the AP station was supposed to be unfamiliar for Ripley. I mean it's not completely irreconcilable - maybe Burke was just being a corporate shill and doing the typical "pre-written salesman pitch" thing on reflex or something.
yep that's a good spot. Ripley didn't seem to have ever seen atmosphere processors in any of those mining/colony wordls the Nostromo was assigned to.

In this particular case (only) I'd prefer to give preference to Cameron's lore since It was Cameron the one who invented/brought them to the franchise. I really thought Ripley was still floating in space when the first of these things was built and then used for the first time by the company

There could be more than one incongruences in the timeline posted in this web, and anything they touch that was first brought to the franchise by Cameron and not Scott should try to connect better with Vameron's lore.

Hope Camerons' queen is not in their plans too ;D

« Last Edit: Apr 27, 2012, 08:25:28 PM by escroto »

Eva
Apr 27, 2012, 08:24:11 PM
Reply #81 on: Apr 27, 2012, 08:24:11 PM
Thx chupacabras... I learned something new today then  :)

Now I seem to remember how in Die Hard, Karls rifle (the one he's seen assembling in the elevator, going upstairs to kick McClanes ass) has the clip behind the trigger, not in front of it. I assume then - based on what you are saying, that this design is about preserving the advantages of a longer rifle barrel, while reducing the total length of the rifle at the same time, making it lighter and more easy to handle.

It has an awesome design by the way...


Deuterium
Apr 27, 2012, 08:26:41 PM
Reply #82 on: Apr 27, 2012, 08:26:41 PM
Curious: (I don't know anything about gun designs either)

- the inside of a gun barrel is in direct contact with the projectile, yes? So wouldn't a longer barrel reduce the speed of the projectile because of drag?

I assumed the necessity of a longer barrel, was about stabilizing the projectiles trajectory before it leaves the muzzle and thereby aiming for higher precision, not as much a higher projectile velocity...

Hi Eva,

Due to the expansion of the gases, the bullet generally accelerates along the full length of the barrel.  So, for a given bullet mass, and given propellent type/charge, the "muzzle velocity" of the bullet (initial velocity as it exits the muzzle) is largely a function of the barrel length.  Now, this is a bit of a generalization.  There are trade-offs to having too short a barrel, and too long a barrel...both in terms of ballistics, as well as to operational function, so the firearms designer tries to optimize the barrel length depending on the intended purpose of the firearm.

And yes, for a given projectile and cartridge, there is a limit point whereby the barrel would become too long, which would have a detrimental effect on the muzzle velocity.  This would occur when the friction between the bullet and the barrel, as well as air resistance, equals the continuously diminishing gas pressure behind the bullet...at which point the bullet would begin to deccelerate, before exiting the muzzle.

« Last Edit: Apr 27, 2012, 08:36:41 PM by Deuterium »

Firestorm
Apr 27, 2012, 08:32:46 PM
Reply #83 on: Apr 27, 2012, 08:32:46 PM
Thx chupacabras... I learned something new today then  :)

Now I seem to remember how in Die Hard, Karls rifle (the one he's seen assembling in the elevator, going upstairs to kick McClanes ass) has the clip behind the trigger, not in front of it. I assume then - based on what you are saying, that this design is about preserving the advantages of a longer rifle barrel, while reducing the total length of the rifle at the same time, making it lighter and more easy to handle.

It has an awesome design by the way...

http://en.wikipedia.org/wiki/Bullpup



wmmvrrvrrmm
Apr 27, 2012, 09:00:49 PM
Reply #85 on: Apr 27, 2012, 09:00:49 PM
here's another exoskeleton, this one is in L'Uomo Vogue




Infected
Apr 27, 2012, 09:39:37 PM
Reply #86 on: Apr 27, 2012, 09:39:37 PM
Is this stuff real? i mean this is a real direct connection to ALIENS.
Then everything from ALIENS is cannon.


MrSpaceJockey
Apr 27, 2012, 09:41:41 PM
Reply #87 on: Apr 27, 2012, 09:41:41 PM
Why wouldn't things from ALIENS be canon in the first place?


chupacabras acheronsis
Apr 27, 2012, 10:59:19 PM
Reply #88 on: Apr 27, 2012, 10:59:19 PM
because butthurt purists.

and if you were wondering, the reason why almost no countries have adopted these seemingly advantageous designs as their infantry mainstay comes down to three factors: poor trigger performance, bad weight balance, and difficult reload/prone firing(the action is way too close to your face). the Aug is one of the better ones and still has these problems.


Xenomrph
Apr 27, 2012, 11:36:25 PM
Reply #89 on: Apr 27, 2012, 11:36:25 PM
Great stuff... the atmosphere processor design as well. As far as the viral campaign goes, it's safe to say that Camerons Aliens is canon... I wonder if there will be a tiny nod somewhere in Prometheus from Scott to Cameron, in a sort of blink-and-you'll miss it fashion...
The Weyland timeline also casually references 'Aliens' a few times (Colonial Marines, smartguns) and 'Alien3' (prison colonies).


 

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