Alright, so as we all know gravity isn't the same on other planets as it is on Earth, there may be some places that come close but for the most part it varies.
The question is, assuming if by the time humanity began colonization they still used cartridge ammunition, how would we compensate for the change in gravity with our ballistics?
>>28373341
>higher gravity
Aim higher.
>lower gravity
Aim lower.
>>28373341
We wouldn't do anything differently. Just visit the space port range, get yourself sighted in, and go on your merry way after you land.
>>28373372
Would you have to aim lower for low gravity? Wouldn't it just mean that the bullet travels in a straight line further than it normally would?
>>28373417
I think he meant to say "hold over less"
>>28373400
Would it really though? All sights are made to work with our gravity, you could get it zero'd for 100 yards properly but your 200, 300, 400, ext... yard elevation would still be way off I'm assuming.
>>28373420
>>28373417
>>28373372
>high gravity
Set your elevation higher and find zero
>low gravity
Really doesn't matter there will just be less drop just find zero first
The real problem is the lack of air for guns to cool down quickly to not over heat
You literally just adjust the sights. Set up a target, and rezero for the average range you anticipate. Practice.
Same as on earth.
Nitrocellulose can burn without oxygen, it has everything it needs in its molecule chain IIRC.
Nothing changes.
>>28373448
Well for sights with elevation built in you would have to change it to match the gravity. I assume by the time we're traveling to other planets with weapons we'll have electronic drop calculators that can take the planet's gravity into account and display the appropriate drop for whatever range.
>>28373420
Gotcha now, that makes more sense
>>28373466
Watercooling mang.
>>28373496
>All guns in the future have water sleeves
>>28373496
>water cooling
>not using fin-stabilized projectiles out of a ceramic-lined barrel
>>28373620
That sounds .... pretty frigging cool.
>>28373620
Oh lawdy yis
>>28373417
>the bullet travels in a straight line
For homework tonight I want you to go on google and see if you can figure out how sighting works for firearms and how bullets travel.
The gunpowder needs air to burn tho
![ss_060310_mars_03.grid-9x2[1].jpg](https://i.imgur.com/tlpINJD.jpg "ss_060310_mars_03.grid-9x2[1].jpg")
>deployed to mars
>time for lunch
>mars rover rolls up, towing mermites in cute as fuck nasa red wagon
>rip-its and pop rocks
i've never felt this advised
>>28373466
>The real problem is the lack of air for guns to cool down quickly to not over heat
>being in outer space or in a planet with no atmosphere
>needing to shoot something
What a nightmare.
>>28373704
>most battlefield casualties occur from blowing oxidizers
It's like everyone has a gun with the security of a flamethrower again.
>>28373620
Please sir, my dick can only get so erect.
>>28373704
Gunpowder does not need oxygen to ignite
>>28373341
>>28373762
>>28373466
>The real problem is the lack of air for guns to cool down quickly to not over heat
I think that won't be a problem in outer space considering it'll be sub-zero almost everywhere.
>>28373852
Then again, come to think of it, the gun would be pretty fucked up considering it's going from hot to cold constantly.
>>28373372
Gravity isn't the only factor, you have to take atmosphere into account too. A bullet will have different ballistics on Venus than on Earth, despite them having similar gravity.
>>28373728
>>28373704
shut the fuck up
>>28373852
Space contains very little to transfer heat into, being a vacuum and all. The heat would stay with the chamber and barrel without a heat sink of some sort.
As bad as it sounds, Mass Effect got it right. Use disposable heat sinks that get replaced like magazines.
>>28373852
Space doesn't work that way >>28373921 has it right
>>28373417
gotcha anon. I ho[e i don't get banned for this high quality photo here
>>28373466
Most places with little to no atmosphere are quite cold. Especially if far from the host star.
As for everything else, a few physics formulas and Miller's equation entries should get you pretty damn close.
>>28373921
>As bad as it sounds, Mass Effect got it right. Use disposable heat sinks that get replaced like magazines.
Not required in breathable atmosphere.
>>28374046
Now draw the biceps of the fucker shooting on the surface of a planet with 10G gravity.
>>28374073
Which only Earth has.
>>28374121
To our knowledge, that is.
>>28374098
there is a very nicely drawn dot inbetween the 1 and the 0
>>28373762
don't you worry little guy, when we finally come to mars, you can bet your solar paneled ass we'll come collect you and build a monument where you stopped.
By rezeroing, what a shitty question
>>28373341
You would download the app from iGuns. If you get the free version you would have to input gravitational and atmospheric data manually. Buy the deluxe version, pair your gun with your iPhone 15s, and the transfer is automatic. Your holographic sight will compensate to always maintain zero.
>>28374046
3/10 you tried
Not sure what your point was, but hopefully this sketch helps you make it.
>>28374073
*not required on a planet with an atmosphere
ftfy
>>28373341
Differences in:
>Atmospheric drag.
>Gravity.
>Ambient temperature.
Propellant effectiveness in that atmosphere may be an issue but modern powder contains its own oxidizers right? So this should not even be an issue as the barrel is sealed behind the projectile unless something in the atmosphere reacts with the powder/primer in the cartridge while in storage
>>28373341
Lasers or laser guided gyrojet ammo. No recoil, basically no heating of gun, no bullet drop.
>>28374898
>hey guys if we still used bullets how would that work
>THE BULLETS WOULD BE LASERS LAL
>>28374898
>Lasers
>basically no heating of gun
NOPE
>>28374898
>>28375306
not to mention the different atmospheres and environments would cause differing effects on the beam and the air itself would have varying levels of thermal self interaction/refraction. You would end up with the same issue as ballistic weapons, having to adjust to the environment for different ranges.
>>28373496
If the planet had low atmospheric pressure - like Mars - the water sleeve would need to be sealed completely and pressurised so it doesn't evaporate.
>>28375306
>>28376019
It's called blooming. The beam ionizes the air as it passes through, dissipating in the process. That's why we don't have practical laser weapons.
>>28376131
>It's called blooming
yeah, if you're a pleb.
https://www.google.com/search?q=laser+thermal+self+interaction&ie=utf-8&oe=utf-8#q=thermal+self+interaction
Physics on /k/ is always amazing
>in space you can't be hot since it's really cold
>lasers have no recoil
you don't understand that lasers firearms will never be a thing , and IF it were to be a thing it would just aim on its own because you have to concentrate your shot on a single point if you want it to be really precise. that's why we use it on vehicles, and no research was done with infantry : it becomes useless.
the way we made firearms are so far the best we can think of, and along with gauss guns they will "only" evolve a bit : everything will be electric inside the gun, no more trigger assembly, caseless ammunition OR the current way we handle ammunition with stronger materials, new bullet types. just like rip round and that .22 round that spin, we can make a lot of ammo type by sculpting the bullet but copper isn't soft/hard/malleable enough to do so , with new materials we will see a lot of thoses designs.
scopes will start being digital only, and you'll be able to see where to shoot depending on the wind , the distance etc.... hell, it already exist and it shoots automatically for you.
like it or not , the future will just be a bunch futuristic AR-15, there won't be any handheld laser or plasma weaponery because thoses would be way too easy to defeat ( a tank that acts as a large magnet and every plasma shot would be off by a few meters, and wearing a reflective armor would just fuck lasers )
beside , we will never fight on another planet in our lifetime so, if we EVER had to fight there we would probably have fucking gundams and drones that act as infantry.
>>28376198
>no fun allowed
even if most of it is true, I can still dream. I can't wait for gauss weapons, either.
>>28373762
Reminds me of Iris on Rainy Days.
>>28373482
shit all you's need to do is put a little microchip in modern day red dots to change the value of moa adjustments based off of planetary/atmospheric data downloaded by your ship/drop pods, computers on the way down.
>>28376361
Tape a Pi Zero with a couple of sensors soldered to it to the side of the optic, and nig-rig it up
put a compartiment in the bullet with oxygen
>>28376412
why
>>28376434
so that bullet will make pow and go forward becayse the air willa burn
>>28374315
We ain't going to mars. Space exploration is expensive and the money should instead be used to bail out failing mega corps and cut taxes for "job creators". Fuck the future of our species gimme some more money NOW!
>>28376131
I posted the chart, I was specifically talking about laser efficiency. It's nowhere near "basically no heating of the gun". There isn't any type of laser that efficient, or any light source in general.
>>28376458
hol up
so u b sayin
the bullet aint gonna go forward?
>>28376488
modern powder has oxidizers. Don't need oxygen.
Here's the real problem: lubrication. In a low-pressure environment, the lubrication will literally boil away, possibly at low temperature. This presents a problem because metals like to stick to each other when at extremely low temperatures: a phenomenon called cold welding. You may not be able to fire your gun at all without an injection of hot lube before a firefight.
>>28376671
>You may not be able to fire your gun at all without an injection of hot lube before a firefight.
That's lewd Anon
>>28376671
Thankfully human males come with their own hot lube dispenser.
>first space colonists and colonial marines will be people like McNig
>>28376371
fuckin A
Would humans colonize other planets at all? I have my doubts about our capability for breeding and self-sustainable colonies in other planets when Europeans, attempting to settle in High-altitude towns in South-America, routinely aborted before they began mixing their genes with the locals.
SPACE IS NOT COLD.
>>28373341
considering there's no oxygen, I'm not really sure how you think you're going to fire normal bullets.
>>28373341
>warfare
>in space
fuck off
>>28373852
just because it's cold doesn't mean there's anything for the heat to dissipate into
>>28373417
If anyone wonders how well the public education system is working: there's your answer.
>>28373341
Would DI work in space, or would all the gasses get sucked out of the barrel/DI system before it has a chance to work the bolt back?
>>28376980
we'd have to simulate earth gravity
the human body turns to a pudgy amorphus shallow husk of itself in zero and low g environments with in days
any kid conceived in that kind of environment would be a fragile mess thatd probably die in infancy
>>28377021
We had people live over a year in space.
They could walk on their own in gear upon reentry.
>>28376988
Bullets have O2 inside of them, its chemically activated.
>>28376980
Mars is our only other option in the Solar System.
We'd have to start out living in domed cities/settlements.
>>28377035
http://www.nasa.gov/externalflash/HRP_Feature/
The problem for space weapons is overheating. This is the most common problem for most machines/humans in space is managing heat. Since Space is void, it is neither cold nor hot. The only heat comes from the object itself and radiation. Radiation is the worst way to get rid of heat. Worse, there's a big source of radiation in our solar system: The Sun. That means that machines are periodically subjected to thermal shocks.
>>28373341
i thought 9.8 m/s^2 is constant.
>>28373733
>being in outer space or in a planet with no atmosphere
>needing to shoot something
Other people bro.
>corporate warfare between rival terrforming companies
>national disputes about treaties and rights to colonize
>martian separatism
>>28377068
Only with Earth's gravity and atmospheric composition. Different gravities and atmosphere's would be different.
Revolvers might be popular in free fall, since other weapons eject their spent cartridges. Just imagine spent cartridges flying around within compartment and shorting out delicate equipment and oxygen bottles.
>>28373448
Use miliradian adjustments.
Gravitational constants will be used to give easy conversion charts which will be common knowledge among shooters. All you need is an industry standard for scope/sight reticles and since miliradians are based off of a universal mathematical constant (pi) they make the most sense.
Sight adjustment would also be very easy to explain to advanced alium species we might encounter since the measurements aren't based off of dimensions humans arbitrarily invented like yards or meters.
>>28377068
F = G(m1)(m2)/r^2
>>28377092
Caseless ammunition would also be a good way to minimize that.
Basically, what you would need is a select-fire, light assault rifle with a hot/cold temperature regulator, that fires caseless ammunition.
Sounds expensive...
>>28377111
>caseless
what about all the hot sticky residue?
>>28377068
That's Earth's gravity, it isn't the same everywhere.
>>28374526
This tbqh desu senpai
>>28377117
Collection chamber covering the ejector port, mi familia.
>>28377139
>>28377092
thats dumb
lets use polymer cases
>>28376671
What is grease?
>>28377076
Red Faction all over the place
>>28377018
All gas systems work slightly better in a vacuum.
>>28377117
Oh Jesus, I don't want to even imagine all the problems that could cause on board a spaceship.
Given how delicate is some equipment, the presence of things that blow up within a ship, close-quarters, and how easy is to give yourself a bulletproof spacesuit, I can see space combat being melee-oriented. Or having to use expensive smart-bullets.
>>28377171
>we ostrich hammer naow
>>28377183
>melee oriented
We LotGH now?
>>28376980
Genetic Engineering.
>>28377183
>and how easy is to give yourself a bulletproof spacesuit
I don't think it would be very easy.. Current air pressure based spaces suits will decompress if punctured. A mechanical pressure based space activity suit won't decompress but your body underneath might once your skin is punctured. There's no gravity in space but there's still momentum and it'd be a bitch to move around in a huge heavy armored suit
>>28377183
>melee oriented
That's stupid af. All those reasons only make it even more likely to use projectile weapons, likely really small, hypervelocity ones. You need to stop playing video games and reading comic books.
>>28374898
>recoil
That would be a pretty big issue in low to no gravity, not to mention the effect it would have on peoples bodies. Unless they are taking steroids they are going to be a lot weaker after spending prolonged amounts of time in less than Earth gravity. I'm a bit curious about how they are planning to handle that for Mars if they want a colony there, realistically if people are there for long periods of time how motivated they are to work out with other obligations it'd take to maintain structures and keep it livable a lot of people are not going to want to do physical training.
Less gravity would make managing recoil without being knocked over a lot more difficult, and less strength to do it with if your body starts adapting to that gravity effect.
Wonder how realistic some of Heinlein' s books about gravity effects having permanent physiological changes happening would turn out to be
>>28377018
>implying the gun will even fucking notice a ~14.5 PSI difference
>>28377413
you can work out, problem is your body dumping calcium like its enron stock
>>28377427
Why would it be doing that? Is because of lack of sun?
>>28377424
This. Guns operate at thousands of PSI. The lack of measly amount of pressure like earth's atmosphere won't inhibit it
>>28377413
Recoil issues are exaggerated. Any bracing at all would take care of the recoil. A .45 automatic will give 0.12 m/s of deltaV to a 50 kg person.
>>28377436
Free fall issues. Also astronaut's sight have the tendency to deteriorate due the accumulation of liquid within the eyes.
>>28377467
That prob explains the blindness they experience during long durations in space.
Bright flashes when they close their eyes, seeing giant pops of colors.
>>28377413
Your first problem is not recoil, but spinning. You'll spin out of control first (since you aren't quite applying force to your center of mass) and only then MAYBE fly away backwards into deep space never to be seen again.
So yeah, jetpacks to compensate. Assuming anyone ever needs to actually shoot in space, since I really don't see the point.
>>28377413
>realistically if people are there for long periods of time how motivated they are to work out with other obligations it'd take to maintain structures and keep it livable a lot of people are not going to want to do physical training.
Maybe you could just man your Mars colony with people who aren't lazy.
>>28373341
Ballistic coefficient and weight are the only factors change and they pretty much define the other values.
All you need to know is the gravity and the density of the atmosphere.
>>28373620
>fin stabilized
>in vacum or low atmos world
Sorry anon, does not work like that.
>>28374577
The "line" of sight is also subjected to the atmosphere density and technically gravity so a different gas and temperature could have an effect.
>>28373762
Damn it i did not ask for these feels anon.
>>28373762
Don't feel sorry for Mars probes. >>28374315 is right, that probe will be in a Smithsonian or something someday.
Feel sorry for probes we send to Venus or something. The ones that when if we recover, are much worse for wear.
>>28377513
lol I'm just being realistic, how many times you had a long day up for hours then think I'm gonna knock out a bunch of cardio or weight training instead of hitting the bunk.
Quite honestly psychologically I'm going to be surprised if people don't just get depression and lose the will to live in that sort of environment when they realize every day of their life is in a tiny little man made habitat very claustrophobic, no going outside and getting some sun just artificial lighting, no going for a stroll in the park and seeing vegetation growing or wildlife, no going back and if you could it'd take months in a cramped vessel. None of the small creature comforts like junk food, drinks, booze, tobacco, or nicknacks you could go find at a corner store or walmart performance artists and music that type of media at your hands, small population of people no meeting someone totally new like in a bigger city. It'd be drear life and very oppressive compared to Earth. Not to mention if they start breeding how many of their offspring would rather live on Earth compared to Mars and not having that decision like they had.
>>28373762
Have to post the complete version, anon.>>28373762
>>28377700
Matt Damon dug him out.
>>28376198
This fella got it right in energy weapons. Returning to conventional weapons for infantry in space if i were to make one I would hook up the cooling system of the suit to the cooling system of the weapon, so you can take advantage of the residual heat and for aiming a ballistic computer
>>28377600
theres a reason they don't send little bitches into space anon.
>>28377721
You mean Val Kilmer, right?
>>28373704
Please take a short moment to think about it.. the powder in the cartage gets ignited, the gas in it expands and presses the bullet through the barrel.
Where does the oxygen enter the barrel that the powder needs in order to burn?
And is it possible to keep it from burning by exhaling CO2 into the muzzle and then sticking the barrel into your mouth to keep new oxygen from getting in?
>>28377183
>its the year 2100
>Humans have colonized Mars and are preparing ships to other galaxies
>space kebab suicide bomb ship in construction
>space ching's get blamed for mess
>massive orbital battle takes place on a Demos
>massive capital ships slug it out with railguns and space torpedos
>on the moon infantry takes place
zoom in
>A space marine and a space ching are in hand to hand combat
>Marine pulls out small metal rod
>ching laughs
>jabs metal rod into ching
>turns it on
>slowly whispers "The Death Star was a inside job" to the ching as the lightsaber cuts into the ching
>fin
>>28376198
well two things:
1) you don't have to aim at the same spot with a high enough energy pulse laser it will finish the firing sequence before you can move it to an other spot, also it's very much possible with laser weapons to create a plasma explosion on the surface you are shooting instead of just burning through slowly.
basically a laser rifle will blow your arm off sooner and create painful paralyzing emp that overloads your central nervous system than it can penetrate your skull.
in this regard fantasy laser weapons are dead wrong they always imagine laser cutting through stuff but that is not so easy. takes a lot of time. it's way faster to cut a steel pipe with a laser cutter than with a just about anything aside a plasma cutter but it's still impractically slow to cut through armor or even flesh. ceramic armor would really give lasers a hard time.
2) plasma weapons will if ever exist probably be plasma vortex weapons that shoot a slowly expanding torus of swirling plasma that again explodes on impact and will have fucking short range and slow travel (in atmosphere they must travel significantly slower than the speed of sound, in vacuum some space magic with self induced electromagnetic containment field is required).
>>28377454
>DeltaV becomes a common metric for firearms performance
>phone apps that calculate DeltaV based on your weight and your gun's caliber, barrel length, action type, and cartridge
oh shit, I just got a stupid idea
>out in space guardan whatever
>see space commies closing in
>hit button, activate remote recoilless rifles loaded with tungsten flechettes
>they float in space, aimed via rcs thruster
>can fire on command or be automated
>watch poor dirty space commies in space suits with space AKs get ventilated by 100's of space darts while you sip space coffee in your space office and space masturbate.
>in space! (what a tweest)
>>28376198
>wearing a reflective armor would just fuck my shit up senpai
How about no.
Okay, so you reflected a bit of laser energy before your mirror suit got vaped, big deal.
>but muh 100% reflection
so I shoot the joints with my literally perfectly accurate laser.
>muh joints reflect too na na na na na na
so I shoot the gun in your hands and let the explosion take you out or damage your reflecting capability
>the gun's reflecting too
how much fucking money are you spending on mirrors? I hope they're well armored and still capable of reflecting after taking a few rounds of classic slugthrower fire.
I brought 15 different weapons with me because I don't have to carry them. Most of them are in this bag on a string that's tied to my belt.
There are also automated guns floating around here and there that I can command, both laser and kinetic types.
I won't mention the moon in this solar system that's been partially hollowed out to house a truly massive reactor complex powering a single laser. Oh, crap, too late.
Funny thing about a laser is, you don't get to see it until it hits you, even if that takes seven or eight minutes.
So when you see a laser weapon firing, it is already hitting you.
Uh, not that you would actually be able to see this one firing, unless you have some really fancy gear in that helmet.
Be sure to tell Stalin I said "Hello, and Heil America!"
*pop*
>>28373341
Pretty simple IMO senpai, add a new grav turret to scopes that moves the elevation lines closer together or further apart.
Now your 100m zero still lines up with your 150m mark or whatever.
>>28378518
I should add that this is assuming there's some kind of mad fast transport or teleport on the go here, otherwise you'd just have optics for any planet you're operating on, or different gravity levels in general.
>>28377111
Caseless would be even worse in the vacuum of space. No brass casing to absorb heat means all of it is going into the gun.
A brass deflector or collection system would be much more logical than caseless in space. At least, until you have a highly effective temperature regulation system, but by the time we can cool a firearm that effectively, we might as well switch over to directed energy weapons and leave old metal spitters to in atmosphere engagements.
>>28373341
>be big sight making company
>design acog or scope with different markers for different distances specific to a certain planet's gravity
>sell to gubmint or private companies that are oper8ing on other planets
>profit
>>28376671
Cold welding?
That's an easy solve.
Use different metals or alloys for contact surfaces, prioritizing material if necessary.
Would different SAE steel grades still cold weld as strongly as two identical steels, or at all? If they don't cold weld readily, the solution may be even easier.
I'm no expert, just guessing.
>>28373921
>disposable heat sinks like magazines
>Mass Effect got it right
BRILLIANT. But couldn't they be reusable? I fucking LOVE when video games use real life mechanics. I wish Notch would have made minecraft ores look like actual metal oxides. Iron ore would be red instead of silver, etc. Video games can be great "covert" educational tools. But, whatever... gotta have a little creative liberty.
>>28373341
wut
I want to colonize this beautiful planet
>>28378640
Mass Effect's magazines were retarded though
In ME1 no guns had magazines, just Heat limits. A properly modified gun would effectively NEVER overheat.
ME2 added the heat sink mags which were technologically obsolete for no actual reason than "make it more like Gears of War"
>>28373417
google "parabola" for me.
>>28373496
Water might freeze or evaporate depending on the planet. There's this odd bit of chemistry where the boiling point drops with the pressure so if there's no air the water would boil at room temperature. Keeping the water in an airtight container just makes it a bomb.
Oil would be better if you can hook it up to a good radiator.
>>28377481
the bright flashes are cosmic rays hitting their retinas.
>>28381216
this
one of the fascinating bits of human exposure to hard vacuum is that the water on your tongue would boil off shortly before you passed out and froze.
...so if heat disperses so slowly in space, does that mean if you put me in space naked it would take a long time for me to get cold...barring death from any other means
>>28381804
You would overheat if it wasn't for the depressurization.
>>28381822
this you would lose some air and vapors through your pores and you would lose a hell of a lot of heat with that.
it's not funny to do naked spacewalks but you can survive for a short amount of time. you will not freeze over or explode either but some tissue damage is inevitable. eyes would be the most problematic.
>>28373921
Like a Lewis gun?
>>28382136
So the Nuka Cola girl would actually last for awhile in hard vacuum?
>>28373496
>year 3143
>WW1 level tech
>>28382625
She'd last considerably longer than she'd like.
>>28374898
>gyrojet
>in space
>shooter is in a space suit
Probably the worst choice of KE type weapon for 0G environment. (hint - the backblast from the rocket will fuck up the suit)
>no recoil
unless it's designed to by recoiless (which the gyrojet was not, the recoil was small, but not 0) you still have recoil. Also, the rocket backblast would impart force on you as well...
Recoilless rifles are a different story, but would probably need modification to the venturi nozzle to work in vacuum/low pressure. Also, backblast from them would be absolutely destructive to anything close behind the shooter.
>>28376198
>reflective armor
nigger you ever see what happens to an industrial laser mirror if the tiniest speck of dust gets on it and the laser fires? (hint - the laser melts it/sets in on fire)
This armor of yours would work for couple of seconds once the tank roll from the factory, once it gets dirty, it's useless.
>>28374746
Even normal cased ammo is nearly airtight, the propellant doesn't give a flying fuck about the atmosphere.
Temperature is a very big issue though.
>>28377541
It does if your propellant runs into your fins
>>28377171
think about it,
> At least a couple of months away from Earth even at perfect position of planets
> Travel is probably expensive as fuck
> You can't legally claim landspace of other planets (to be more precise, nobody will acknowledge that), so if you want to mine at a spot, you have to keep rivals away (somehow...)
> you have weapons, they don't - you make the rules
>>28383896
that would actually cause it to tumble...
>>28377092
yeah, cause the hot, high velocity gases escaping from the gap between the drum and barrel would totally not fuck up your suit. If you want a space gun, it has to be space suit compatible.
>>28373728
I always wanted the Chinese or Russians to send a rover to Mars. Just so when the US rover runs into it, it gets the shit beaten out of it by interplanetary freedom.
>>28382625
Yes a little bit. The head needs pressure the most. The skin is naturally airtight. This is how space activity suits function - no air seal, just mechanical pressure to keep your body from expand. The exposed skin wouldn't fare well but she'd stay alive for a while
>>28378493
a laser would be one of the worst way to transfer energy in a non-vacuum because air is everywhere and it takes most of the energy away. and even if air wasn't a problem, you'd have to fucking aim for a few seconds on a single dot the size of your microscopic dick to "hope" to make a scratch on an armor, and that completely ignore living tissues who react differently to heat. and i'm saying "armor" since by the time we can have a portable battery capable of holding enough energy to power that retarded device of yours, we'll probably already have exoskeletons and full body armor. explosives will be the biggest enemy, and not retarded lasers.
when i said "reflective armor", i said that in the event that a retard state , governed by a retard president like you, asking retarded engineers to build a retarded laser gun, it would be so bad that you could defeat it by wearing a mirror stolen at the local sephora store where you dumb neet ass is working, since you're most likely a fucking wage-slave without a job , spouting things like "lasers are literally accurate", which you prove is not the case in high school.
god damn it, retarded americunt with no education makes my blood boil.
>>28376131
Also the small problem that lasers are, at best, around 50% thermal efficient and 40% is more realistic.
So if you generate a 10 kilowatt beam, expect to need to dissipate 10 kilowatts of heat. That's a lot of heat. To put that in perspective, that's as much heat as you would feel if you were shot with a ten kilowatt laser.
>>28384997
Mechanical counterpressure suits are air and watertight, but don't capture a envelope of pressurized air around the body. This lets them be far less stiff, lighter and thinner then conventional suits.
A conventional suit is very awkward because you are, in truth, in an inflated balloon.
>>28387786
I've never read about mechanical counterpressure suits being airtight. The skin is already airtight so the suit doesn't really need it. Got any source on that airtight-ness? Not arguing, I just wanna know
>yfw you realize that due to lower convective cooling, that 'ray gun' designs from the 60's with the circular fins all over the barrel are actually practical and logical as a method of heat dissipation
Skin is not "airtight" in a way that it could withstand forces imposed on the body by hard vacuum outside.
>>28377183
>bulletproof
Use bigger gun.
>>28376060
then we use liquid mercury!
>>28377481
Actually that's Cherenkov radiation caused by high speed particles wizzing through space and into their eyes.
>>28387847
Yes, that's because the body pushes 'out' with a force equal to air pushing 'in', 14 psi at sea level.
Humans can adapt to pressure as low as about 4psi. Under that the skin starts brushing and the body expands painfully as internal pressure is too high. A conventional spacesuit protects a person from this by surrounding them with a gas envelop. (To see the effects on low pressure, see pic)
Mechanical counter-pressure suits wrap the body with a solid, rather then gas, envelope that prevents that expansion, keeping a healthy 4psi on the surface of the skin.
Current suits can't do fiddly bits very well, so gloves and boots and helmet are pressurized.
>>28387829
Is right. They don't need to be airtight, and trapped air under the suit would form awkward bubbles. Lycra, elastic and Kevlar are the primary materials of the MIT prototype.
>>28384065
Why the fuck would any part of your suit or anything else be hovering over the cylinder gap you mongoloid?
>>28387847
That's what the mechanical counterpressure is for, so your skin doesn't expand in the vacuum. I'm looking for sources either way. I found one, a NASA paper about a suit for the very low pressure atmosphere of Mars
>A pure MCP Martian EVA suit would comprise of elastics garments over the whole body except for the head, which would be pressurised with the breathing oxygen (see Fig. 4). A dust/protection overgarment would be worn over the MCP layer which could be sealed or unsealed via a filter as necessary. This would allow cold Martian air to circulate and assist perspiration if necessary
still reading
>>28387994
forgot link
http://quest.nasa.gov/projects/spacewardbound/australia2009/docs/Waldie%202005%20MCP-Paper.pdf
>>28387994
another quote
>The leakage from an MCP outer layer would be considerably reduced as there are far fewer bearings and joints and because the interior gaseous pressure (except for the helmet) is equal to the outside environment
>>28373472
That and smokeless powder contains oxidizer because it's an airtight seal between case and bullet until the action cycles.
A useful military advantage to the mechanical counter-pressure suit is that it isn't ruined if breached. A bullet hole could be patched in the field with fast hardening foam of tape. Getting a good seal on a breached conventional suit is hard, given the escaping gas.
>>28380960
They explained why they added them in ME3 at least. The Heat "Clips" system was reintroduced in order to better facilitate rapid fire scenarios. Without the heat clips, you could overheat your gun and cause it to effactively jam, leaving you wihout a functioning gun for a few seconds. In ME3, all guns are equipped with the Clips which in most guns simply work by you pushing the current clip out with another one, ala AK mag rocking.
Also in the fluff an overheated weapon was supposed to be useless for a much longer period than in the game. I think it even mentioned that because of the way the guns work, and overheated gun could warp the barrel so hard that it couldn't even fire any more.
Don't think they really explained it in ME2 though.
>>28388039
Trouble is they explain them like disposable heat sinks, but at the same time don't explain why they
A) don't cool down over time, regenerating your 'ammo count' per 'clip'
B) If I have a loadout of 10 'clips', why I can't reuse the first one now that its cooled when I have to reload the 10th
>>28373704
Lrn to physics, bro
>>28373466
>The real problem is the lack of air for guns to cool down quickly to not over heat
M4 could dump around 3-4 mags without any cooling whatsoever with all heat going into gun.
>>28377365
>not wanting to blow holes in the very thing keeping you alive is "muh vidya games"
No.
If you're inside a space station/ship/base, attacker or defender, putting holes in the skin and the valuable components is the last thing you want. No wild LoGH-style axe swinging either. Specialized grappling and knife-fighting.
>>28388057
and then not work for hours
>>28388052
The way I like to see it is like there's a fluid inside them that gradually gets depleted, rather than being a block heatsink like you would see inside of a PC for example.
I'm probably just explaining away shit but it seems feasible to me.
Transfer your brain into a black box and put that box into a mech
Best idea in the thread
>>28373341
AK's and other guns that could survive an incredibly dusty environment would be the only option on Mars. Unless of course the United States wanted to develop the AR-18 more.
>>28388080
>Implying we wouldn't just see the resurgence of G11-style hermetically sealed internals
>All this overheating talk
>Be mars cowboy and carry a brace of six-shooters to switch between during cooldown periods
Y'all don't need this fancy shit.
>>28376671
>modern powder has oxidizers. Don't need oxygen.
All propellants (all explosives for that matter) have oxidisers you retard.
>>28388089
That would be kinda cool. Buttloads of lightweight ammo packed in the stock. If you have to reload .... don't, just retreat
>>28388065
>>28388052
Because the gun doesn't have a radiator anymore, and the heat sink is insulated from the rest of the weapon to keep it from damaging the internals.
You can't wait for it to cool because it's a chunk of super-heated lithium. Not exactly something you drop into your pocket.
>>28388089
Actively cooled caseless weapons would be nice. A shutter over the barrel and no ports save for the magazine well to keep dust out. Give it a compressed nitrogen cylinder to cool the weapon between shots with a puff of gas.
>>28377326
Exoskeletons aren't really that far off, with the primary sticking point being a power supply. A hundred years a batteries might be good enough to operate them.
This would still favor projectiles though, albeit more of the AP variety, unless around a lot of sensitive equipment. But I'm not sure there's a good way to fight in such an environment. If you need to it'd probably be best to just be careful and hope for the best.
Of course, all this speculation is probably for naught, since most of the hazardous environment combat is almost certainly going to be done by drones.
>>28384017
The Hale rocket made it work.
Gyrojets might actually be the solution to a lot of this. Would need to implement a kicker of some sort to make up for low initial velocity, but that should require a lot less energy than a conventional bullet.
>>28384065
First, see >>28387986
Second, that was a nagant revolver, which, incidently, doesn't have that issue anyway. Trade off being a ridicules trigger pull, but that's beside the point.
>>28388166
>it's a chunk of super-heated lithium
If you're using solid lithium (despite its reactivity being a major pain in the ass, https://www.youtube.com/watch?v=wY0afMI4Jgc ), then the point is for it to not get very hot. It has a superb heat capacity for a solid, so it takes quite a lot to change its temperature, but melts at a mere 180°C/360°F.
If liquid is fine, and we're not going to extreme temperatures anyway, then plain old water has a higher heat capacity. And thanks to water's immense heat of vaporisation it takes about 2.5 times as much energy to go from 20°C water and boil that away as it takes to take 20°C lithium and melting that.
So if we can mess around with liquids, then water is the gold standard for consumable coolant. While if you're looking to dump a lot of heat into a solid chunk, then we probably want to find something with a better combination of heat capacity and melting point than lithium. Iron will get us 20% more heat per kg before it starts melting, in 1/16 of the volume, and basically none of the chemical excitement.
