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July 14, 2012
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Deimos UAW render 2 by doug7070 Deimos UAW render 2 by doug7070
Comments and critique are greatly appreciated!
The second render of one of my new Deimos variant weapons.
The Deimos weapon line began with the Deimos LRR, which I have now chosen to branch out into multiple weapons for different roles.

Deimos variant list:
Deimos Universal Assault Weapon (UAW) [Currently viewing]
Deimos Multiple Range Weapon (MRW)
Future variants may be produced at a later time.

Deimos UAW design specifications:
-Role: general purpose assault weapon.
-Action: open chamber magazine fed multistage electromagnetic projectile accelerator.
-Ammunition: 8x40MM inline-finned steel rounds.
-Power source: (2) high density power supply cells, build in to magazine.
-Capacitors: (16) high charge/drain linked cells.
-Magazine: 150 round high-capacity quadruple stacked box.

Deimos UAW performance specifications (all specifications are based on weapon using standard capacitor charge/discharge cycle):
-Fire modes: safe, semi-automatic, fully-automatic.
-Effective range: approximately 1,000 meters.
-Average muzzle velocity: approximately 4,000 feet per second.
-Rate of fire: 950 rounds per minute.

Model information:
All modeling and texturing: Douglas Kehrly.
Model Douglas Kehrly 2012.
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:iconxxxkenseixxx:
xxxKenseIxxx Featured By Owner Jul 27, 2012
If i had this gun, I'd probably have a very tough time changing mags while being sprayed by enemy ordinance. There's a reason most of the mags on the guns are in the front, with the exceptions of the AUG and the like. Anyway good design, altho miniaturizing a rail gun is pointless, at leas the gun wouldn't be loud, unless you discharge tons of current.
Reply
:icondoug7070:
doug7070 Featured By Owner Jul 27, 2012  Hobbyist Digital Artist
The magazine change would be slightly less intuitive for this weapon than for something like, say, an M16. However, the weapon's magazine does hold 150 rounds of ammunition, a capacity more akin to that of a light machine gun than a standard assault rifle.

Also this weapon is a Gauss, AKA Coilgun, design—NOT a Railgun. The two systems are often thought to be interchangeable, but are in fact very different methods of operation.

As to the sound, the weapon would produce a super-sonic crack due to its high standard muzzle velocity, but could be fired at lower power to produce nearly silent sub-sonic velocities.

I hope that explains a little bit of my thinking on the matter, and thanks for the critique!
Reply
:iconxxxkenseixxx:
xxxKenseIxxx Featured By Owner Jul 27, 2012
Hmm, both work with electricity, the muzzle velocity is that of a low powered railgun, and since this is fictional i thought it was one. I just noticed there's no muzzle break, with such speed it's a good idea to add one.
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:icondoug7070:
doug7070 Featured By Owner Jul 27, 2012  Hobbyist Digital Artist
A muzzle brake would not be of any use on an electromagnetic weapon though, as they work by redirecting the gasses generated by the expanding propellant used in standard firearms ammunition.
Because electromagnetic weapons such as Gauss guns and Railguns do not use any sort of explosive propellant a muzzle brake fitted to one would be almost totally without effect.
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:iconxxxkenseixxx:
xxxKenseIxxx Featured By Owner Jul 27, 2012
I'm sorry, I aint english, what i meant was a silencer. If my memory serves me right, there are silencers that increase the frequency of the sound somehow by bouncing around the prop gasses, turning it into ultrasound, thus making it impossible for the human ear to register anything. Altho there are no gasses to bounce around in this case, I'm sure that an acoustic silencer would work, but that's just nitpicking. This is all fictional anyway :D
Reply
:iconpmgsnipes:
PMGSnipes Featured By Owner Jul 27, 2012  Student Artist
No it would not work, because they change the frequency of the gases expanding from the explosion that drive conventional bullets. You're thinking of the AN-94, 1st, it does not actually function as well as you would think and 2ndly, it's a glorified whistle.
Reply
:icondoug7070:
doug7070 Featured By Owner Jul 27, 2012  Hobbyist Digital Artist
Correct.
In fact the operation of the weapon itself would be next to silent, the only loud sound produced would be that of the bullet passing the sound barrier.
Reply
:iconjerryyeh712:
JerryYeh712 Featured By Owner Jul 24, 2012  Hobbyist Digital Artist
Well done, love the design. Solid modeling skill as well.
Reply
:icondoug7070:
doug7070 Featured By Owner Jul 24, 2012  Hobbyist Digital Artist
Thanks!
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:iconazurareegar:
AzuraReegar Featured By Owner Jul 15, 2012  Hobbyist Photographer
4.000 feet per second means 1209.8 meter per second... i am actually pretty sure this is impossible to reach :D you wrote the bullets are almost done out of steel, which is only a bit lighter than lead (at these speeds, the weight does not count that much anymore) ... a bullet of this size could reach a maximum speed of 980 m/s but never 1209...

if you want to reach these high speeds i would recommend to think about liquid ammunition. liquids harden at high speeds... so this may would work better than an already hard bullet.

however, nice job in design :)
Reply
:iconpenuser:
PenUser Featured By Owner Jul 22, 2012  Hobbyist General Artist
Sorry about this, but being a huge nerd on these things I must say that this has actually been done already:

[link]

The method of operation is different, but essentially the Steyr ACR exceeds the muzzle velocity of this fictional gun(the flechette velocity being 1450 m/s). It wasn't massproduced though- but still, possible to do. :) Oh and liquid wouldn't make a very good ammunition since it loses energy and deforms very quickly. That's why the principle is mainly used in waterguns...

Oh, and doug is actually right on, this gun could probably be made, but the using a railgun principle to attain such a low velocity would be a total waste of resources. More info on actual railgun projects:

[link]

Right, I'll just leave now. ^^;
Reply
:icondoug7070:
doug7070 Featured By Owner Jul 23, 2012  Hobbyist Digital Artist
While your ballistics information is quite sound I would just like to note the fact that this weapon is not, in fact, a Railgun. This weapon is designed as a Gauss gun, AKA coil gun, which has a much different manner of operation than that of a Railgun.

The reason I chose a Gauss firing system is that it is, theoretically, a much lower maintenance system than that of a Railgun.
It is a common misconception that Gauss gun and Railgun refer to the same weapon, when in fact they each have much different properties which effect their possible uses as weapons.

Here's the wiki articles on Gauss (Coilgun) systems: [link]

And Railgun systems: [link]

Giving them a quick run-through may provide some insight as to why I chose the Gauss gun system of operation over the Railgun system for this weapon. I hope it helps to add a bit to the point in question.
Reply
:iconpenuser:
PenUser Featured By Owner Jul 24, 2012  Hobbyist General Artist
Oh, that is so. My bad. :/

I just didn't really think about what "multistage electromagnetic projectile accelerator" means there... obviosly railgun would only have one stage. Kinda dismissed that part as technical jargon to be honest... :D

Anyway, I did have some opinion on this render as well, but got distracted by the convo there: The gun looks quite logical for a gauss assembly, having the coils places around the barrel in intervals. Also the black colour is fitting, but it looks a bit too much like cheap plastic. Adding a texture to make them rougher- looking might help. Also, the gun looks sort of fragile for an actual design, with the barrel and the adjecent parts reminding me of, well, lego blocks(this has actually to do a lot with the shiny texture). In any case, all the parts of the construction seem very thin, fragile and exposed for a practical design. For example, there seems to be an empty space between the coil/barrel assembly and the accessory rail above it(actually visible on the LRR render in your gallery)- you could easily have something stuck to that gap, like a branch or a piece of clothing. My suggestion is to have the whole coil inside a detachable sleeve, like the one you can see on the XM25 prototype. I know it's a normal gun, but something similar looking to protect the barrel would be good for a more solid look- there could be some holes cut to it to show the assemblies inside for the sake of scifi-esque look. :)
Reply
:icondoug7070:
doug7070 Featured By Owner Jul 24, 2012  Hobbyist Digital Artist
You make some good points. I'll certainly keep your suggestions in mind when I'm working on this project again.
Thanks for taking the time to leave some good critique, it always helps to get outside opinions.
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:iconpenuser:
PenUser Featured By Owner Jul 24, 2012  Hobbyist General Artist
No prob, it was my pleasure. :)
Reply
:iconazurareegar:
AzuraReegar Featured By Owner Jul 22, 2012  Hobbyist Photographer
hmmm... i think my experiences aren't worth anything now :D okay, i only used normal rifles with normal ammunition when i was in the army and as i am no engineer i never expected that this would really work. i wonder why my calculations... wait, the calculations are made after normal weapons, that's why they did not fit...

however, you are wrong with the liquid. firing water with a very high pressure (i have no exact number in memory)makes it become more hard than steel... did you know that you can cut through steel-concrete with water? that is a water jet, sure, but firing this in intervals with enormous pressure trough a barrel actually works. there are experiments running... also you may not use water, but liquid metal...

however i am confused now... :D
Reply
:iconpenuser:
PenUser Featured By Owner Jul 22, 2012  Hobbyist General Artist
Yes, I know that a liquid cutter can cut through meters of concrete with ease- I've seen one in action. :D The problem with making it into a gun is that the liquid can only sustain the cutting power over a certain distance. Now, trying to cut through an object with the liquid cutter over a distance of, say- 100 meters(a viable battlefield distance)- would be impossible. The cutting action to be applied to the surface it needs constant pressure to be applied, which in turn means that the cutter needs to be on all the time while cutting. This means that the amount of water needed is also massive. This makes it impractical to use on the field as you'd need a tanker truck with you. Furthermore, the liquid cutter doesn't send out a projectile to cut the target, but it sends a stream of water through it- and that stream needs to be constant and close to the surface being cut, otherwise the cutting action is depleted over a distance. Like said, water can retain energy only over a certain distance effectively, in this case it needs to be very close, were talking near melee-distance in combat. So in that effect, it would also be quite useless.

Also, using liquid metal to cut something would be quite tricky since the heat would make it impossible to store it anywhere. It carries no advantage over water, other than being slightly heavier. In any case, a liquid projectile wouldn't be as effective as a solid one, unless you set the liquid on fire and pump it into a confined space such as a bunker or a trench(flamethrowers).

Oh, and the trick about the liquid cutter is that it makes the water act differently than what it otherwise would- in its case like a solid object cutting through something. :)
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:iconazurareegar:
AzuraReegar Featured By Owner Jul 22, 2012  Hobbyist Photographer
yeah that's right...

nothing to add :D
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:iconpenuser:
PenUser Featured By Owner Jul 22, 2012  Hobbyist General Artist
Good to be of service! :)
Reply
:iconazurareegar:
AzuraReegar Featured By Owner Jul 22, 2012  Hobbyist Photographer
yeah... and my experience and knowledge is worth a shit now :D
Reply
:iconpenuser:
PenUser Featured By Owner Jul 22, 2012  Hobbyist General Artist
Nah, you still have knowledge and experience and that in itself is worth something. Besides, seeing how little our own knowledge is worth is the thing that compels us to learn more... so these realizations are a good thing to have! :)
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(1 Reply)
:icondoug7070:
doug7070 Featured By Owner Jul 15, 2012  Hobbyist Digital Artist
The thing with estimating maximum muzzle velocity is that there is no real upper limit when it comes to the projectile itself (until you get to the point where the bullet is deforming or generating a massive amount of heat based on air resistance). Most limits on the muzzle velocity of modern weapons are due to the fact that the chamber pressure generated by rounds capable of propelling projectiles over the 1,000 m/s mark would be too great for a practical weapon's chamber and action to withstand, leading to the weapon literally exploding before it could fire a projectile at such speeds.
There are, however, specialized extreme custom ammunition loads and weapons which reach much higher speeds (some claiming to have reached such insane speeds as 9,000 ft/s).
You may want to have a look at this article, it has some interesting information about the theoretical maximum speeds of modern projectile weapons: [link]

The reason I chose to state such high velocities for this weapon is that it is designed more as a science fiction weapon. While I always attempt to make my designs at least seem plausible, this weapon would be taking into account energy storage and capacitor technology currently beyond the level of modern science.
Reply
:iconazurareegar:
AzuraReegar Featured By Owner Jul 15, 2012  Hobbyist Photographer
yeah i know this... but impossible to reach with steel... of course also with lead impossible.
what i try to say is, it is maybe possible to reach this speed, but not with the from you chosen materials or the range or the caliber.
i took a look at the calculations and they are correct, but most seem to me that they only work under perfect conditions (or the amounts of wind are just set too low) ... my experience as former soldier tells me that this is under real circumstances not possible. not in this way. maybe in the future and with other materials, but not with the given ;)

but regardless it is stunning how much research you did to give the gun plausible stats :)
Reply
:iconpmgsnipes:
PMGSnipes Featured By Owner Jul 27, 2012  Student Artist
>implying that railguns do not exist.
Reply
:icondoug7070:
doug7070 Featured By Owner Jul 15, 2012  Hobbyist Digital Artist
I do make every attempt to make my designs seem plausible, even when they are taking into account technology well beyond that of the modern day.
My outlook on it is that if you're going to spend so much time creating a concept weapon you might as well also take the time to know what you're talking about when it comes to the basic operation of the weapon.
I've seen too many highly skilled artists who can create beautiful, but completely impractical, weapons designs.
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:iconazurareegar:
AzuraReegar Featured By Owner Jul 15, 2012  Hobbyist Photographer
i totally agree... that's also what is necessary to be a good designer for such stuff. if you are a good designer for these things, you also could construct them in real, more or less :D you need to have a little engineer inside you to be able to do such stuff in a realistic way :) i think you are one of them :)
Reply
:icondoug7070:
doug7070 Featured By Owner Jul 15, 2012  Hobbyist Digital Artist
Well thanks.
Also thanks for taking the time to leave in depth critique, it's exactly what I need to move my design process forward.
Reply
:iconazurareegar:
AzuraReegar Featured By Owner Jul 15, 2012  Hobbyist Photographer
you're welcome :)

i am glad some of my knowledge and experience is useful for someone :D
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:iconblacklight-trooper:
Blacklight-Trooper Featured By Owner Jul 14, 2012
Details are amazing, how long did it take to model all that?
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:icondoug7070:
doug7070 Featured By Owner Jul 14, 2012  Hobbyist Digital Artist
I don't really keep track, but likely about 50-60 hours on and off, give or take a few.
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:iconredallex:
RedAllex Featured By Owner Jul 14, 2012  Hobbyist Writer
Your skills with 3D modeling are remarkable. I can see you've got a lot of talent in such a field. Keep up the good work!
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:icondoug7070:
doug7070 Featured By Owner Jul 14, 2012  Hobbyist Digital Artist
Thanks, it really helps to get such favorable words from the community—I put a lot into my work and it's great to know that others can enjoy seeing it.
Reply
:iconredallex:
RedAllex Featured By Owner Jul 14, 2012  Hobbyist Writer
By all means. I enjoy feedback from others, so I figured I'd throw some out there as well!
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:icondoug7070:
doug7070 Featured By Owner Jul 14, 2012  Hobbyist Digital Artist
It is a good way to get people interested in your own work, as most people take at least a passing look at the profile of those who take the time to leave a comment (at least I tend to).
Reply
:iconredallex:
RedAllex Featured By Owner Jul 14, 2012  Hobbyist Writer
Well hey, by all means leave a comment if ya like it. Or even if ya don't, leave some feedback if you feel up to it. Glad to see you've taken interest.
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