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March 19, 2005
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DHM-18 Mastiff by RyujinDX DHM-18 Mastiff by RyujinDX
An Anno Astra demi-suit...

The demi-suit is a development of the mobile suit and the powered suit, bridging the performance gap between the two. Demi-suits are usually considered 'jack-of-all-trades' units, capable of serving and integrating properly with infantry or armoured/mobile suit units. They can handle weapons that are at least partially effective against mobile suits, and are small and light enough to go after powered suits and infantry in all but the most built-up areas. Though they lack any form of protective field, they are mostly immune to infantry small arms, and their size and light weight gives them enough of a concealment and maneuverability advantage to make them difficult targets for MS weaponry in the appropriate terrain.

DHM-18 Mastiff

Currently in use with American Federation forces, the Mastiff is a versatile, cost-effective demi-suit. This late-generation model, manufactured by FMC, is a popular example of a demi-suit which uses a 'saddle'-type operator's compartment. The pilot straddles a special saddle in an erect position, with his legs stretching down into the demi-suit's upper leg sections. While this imposes limits on the waist's range of traverse, it does reduce the space occupied by the operator, which allows for thicker torso armour. The operator's legs fit into an 'active harness' which permits the demi-suit to mimic his leg movements even with neural inductance controls deactivated. The arrangement also makes possible a disposal system for liquid wastes. Many pilots also consider saddle-type accommodations more comfortable than the unavoidably cramped 'bobsled'-type arrangement.

The Mastiff is intended for operations within a gravity field. It lacks maneuvering thrusters, and possesses but three thrusters, one in the backpack and one in each calf. It is primarily used for assisted leaps, jumps and landings. Operations in zero-G would require additional thrusters, propellant and batteries mounted to its hardpoints, as it is powered by an air-breathing high-speed turbine and high-capacity storage batteries.

The Mastiff's head unit possesses a mast-mounted sensor. It is a slim, telescoping cylinder, lying horizontal, that rotates upward and extends to act as a periscope for observation and targeting while the demi-suit remains concealed. Sensors are also mounted on the shoulders and elsewhere to compensate for loss or blockage of the main sensors in the head unit, such as when large, bulky weapons occupy the shoulder hardpoints.

This particular example appears to be equipped for anti-MS work. Its primary weapons are the hypervelocity missile pod and the 25mm hypervelocity coilgun. Both rely on kinetic energy to penetrate armour and are thus pretty useless against soft and area targets. With this payload, a demi-suit has a good chance of inflicting serious damage to a mobile suit at close ranges (and even of knocking out a light MS), especially when organized as an ambush team in close country. For soft targets, it relies on a pair of 6mm 'suppressors,' small-caliber coilguns capable of sustained automatic fire. Held in the hand is a 35mm coil-launcher using multi-purpose ammunition developed and manufactured by Olin. The projectile is a powerful, proximity-fused explosive charge encased by a shell made of Olin's own 'Glacium' memory alloy. Upon detonation, the ogive forms an EFP with sufficient velocity to penetrate light vehicle armour. Each portion of the pre-segmented sleeve reverts to a flechette airfoil shape traveling fast enough to penetrate infantry hardsuits about half of the time within a 5 meter radius. Mounted on the shoulders are active defense arrays in the form of gimbal-mounted directional mines, effective against infantry and incoming missiles. Upon detonation, these mines also produce a dense smoke formulated to block and interfere with major portions of the electromagnetic spectrum. Not shown is the cutter bar wielded by the left hand; this is used for clearing away brush and foliage.

Edit: Inspired in part by Masamune Shirow's Landmates.
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:iconcommander-fillmore:
Commander-Fillmore Featured By Owner Apr 29, 2013
Nice design dude I am working on my own design that is strangely similar to your design
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:icondassuperpenguin39:
dassuperpenguin39 Featured By Owner Apr 21, 2013
Abit curious, wouldn't it be easier to stick an MIUC reactor onto this suit to make it suitable for Zero-G ops, or is it too big to really fit on a Demi-suit?
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:iconryujindx:
RyujinDX Featured By Owner Apr 24, 2013
The reactors are too large for the relevant time period. Ops in zero-g would be limited by the lower specific impulse of more conventional means of propulsion & the available supply of reaction mass.
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:iconleoxiao:
LeoXiao Featured By Owner Dec 24, 2008
the camouflage here is awesome. I like how it has attacked weapons as well as a handheld arm.
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:iconscruffyronin:
scruffyronin Featured By Owner Jan 30, 2008  Professional General Artist
boooo, liit nung image ganda na naman! fave na 'to.
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:iconryujindx:
RyujinDX Featured By Owner Feb 6, 2008
TY. Nung ginawa ko 'to, PIII 800 at 800x600 resolution ang gamit ko.
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:icontutankahmun2:
tutankahmun2 Featured By Owner Jan 2, 2007   Photographer
awesome!
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:iconatholthedestroyer:
AtholTheDestroyer Featured By Owner Dec 17, 2006  Hobbyist General Artist
I want one, I have...uh...um...a gopher prblem to deal with, yea thats it.
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:iconmikkow:
mikkow Featured By Owner Jul 5, 2005
I've always wondered how the legs of the wearer could be put in practically in the legs of the mech. Most such designs (even yours, sort of) seem to have the thighs and legs spaced a bit, which becomes a huuge space for the wearer ;) Due to joints and such, the pilot's hip joints need to be at a similar height and location as the hip joint of the mech/suit. It would give rather thin armor around the groin and inner thigh area and is a clear potential achilles heel of any such design I could imagine.

I've thought about these types of mechs (size) and my most logical solution has been to exclude the pilot from inside - to have them operate by remote control (nearby APC style vehicle perhaps) and with advanced AI incase anything goes wrong with the connection.
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:iconryujindx:
RyujinDX Featured By Owner Jul 6, 2005
In keeping with the overall AA continuity tech-wise, one solution I opted for is, of course, the system used by Masamune Shirow's landmates in Appleseed. In the Mastiff's case, said areas were designed with pretty thick frontal armour and advanced composites. Another system has the operator housed entirely in the cockpit, in a cramped, seated position with controls similar to an AA mobile suit's (I'll probably put up the lineart in the future). Also, remote control without a physical link is not very practical in AA due to the effects of Minovsky Particle jamming (though it can be, and has been, done with DS & MS).

Storywise, though, I intended demi-suits to be proof against infantry small arms and light weaponry only; infantry rocket launchers and anti-materiel rifles are enough to take them down, if the shooter knows what he's aiming at.
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:iconmikkow:
mikkow Featured By Owner Jul 7, 2005
7.62mm rounds can shoot through something like 8cm of steel plating up close. I think it was something crazy and unexpected like that (when AP). In many cases, the mechs listed in fiction weighs maybe 0.7-25 tons. And that's with all the moving parts. In current day, an Abrams M1A2 or Swedish 122 tank weighs 60-69 tons, with very few moving parts and most of the weight in the armor. :| Makes you think a little. Okay, so they have these incredible materials that are new. Then if that was true, what of the TANKS made of such materials weighing 60 tons still? :D

I have a hard time finding a proper place for mechs in a realistic futuristic scenario. There are uses (like urban) but a tank would cost just a fraction and be so much more dependable and, probably better in combat with it's low profile and intense firepower. Comments? :)
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:iconryujindx:
RyujinDX Featured By Owner Jul 7, 2005
8mm, actually. Even the Bradley's 25mm Bushmaster using DU long rod penetrators can penetrate only about 90mm.

MBT's of the current generation usually devote about 1/10 to 1/6 of their total weight to armour. The original M1 had about 6 tons' worth, but this has increased as subsequent M1 variants got heavier. A2 SEP's weight didn't change, but the substitution of Steel with Titanium in some sections allowed the designers to make portions of the armour thicker. They also played around with the armour distribution on the tank.

I also don't subscribe to such low weights for something about 12 meters tall.

I've actually given the question of tank vs. humanoid vehicle a lot of thought. Quoting from my own background material:

Mobile suits were first developed during the ‘slowboat’ era of interstellar travel as a multipurpose vehicle capable of planetary exploration, exploitation, construction and defense. With space at a premium in even the largest colony generation ships, fleets of specialized vehicles were simply an unaffordable luxury. Subsequent UN and privately funded research arrived at the humanoid bipedal form as the most flexible and versatile form for such a vehicle. Using modular construction techniques, the MS could be easily configured for a particular role then be adapted to another role in a matter of minutes. Advances in the development of compact power supplies were to prove instrumental in the construction of a practical MS.....

In the case of AA, it's not really a question of tactical effectiveness, but logistics. Also, it's eminently useful to have vehicles capable of transitioning between two environments (such as zero-g and the simulated gravity in the interior of an O'Neill colony) with little or no preparation rather than wait for the transports to bring in a more appropriate vehicle. These, coupled with historical inertia and other factors, results in an emphasis on MS by manufacturers and most militaries.

Tanks and other vehicles of more conventional layout do exist in AA, of course. I'll have to post up my 'flowtank' concept designs one of these days.
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:iconmikkow:
mikkow Featured By Owner Jul 8, 2005
8mm? ooops. A small mistake by the power of 10. :lol:

9cm with a 25mm automatic gun? Imagine such gun emplacements (anti Mobilesuit).

So the M1A2 only has about 10 tons of armor? That's quite surprising. What the heck is it that weighs soo much? When thinking about that, it's hard to imagine something large and walking being any lighter, or of it is, would be fragile as heck. Hmm. Tricky business.. What of the tanks of that era then? They would be seen as specialized vehicles and being as rock solid and capable to carry large loads, they would have incredibly powerful main weapons, and a super fast targetting system to match, wouldn't they? And be far, far cheaper than the mechs, and not having to fear that much from them either at longer ranges (then again, there's those bastard anti tank missiles..)..
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:iconryujindx:
RyujinDX Featured By Owner Jul 9, 2005
Of course, that's 90mm against standard test RHA, and the actual penetrator's only 96 grams, which won't do much after it's penetrated. The composite armours used on the mantlets of the latest tanks can reach the equivalent of 800mm against KE and 1600mm against HEAT.

With today's tanks, all the equipment simply adds up, especially with tanks using 120mm cannon. The weapon dictates the turret size, and the turret size determines hull size, and the increased size requires more armour to maintain a certain level of armour protection, so on and so forth in a domino effect.

AA 'Flowtanks' have coilguns that are roughly equivalent in power to that of a typical medium MS. This is mainly due to the limits to their total weight, imposed by the type of propulsion used. Flowtanks are basically lifting bodies which operate as either ground-effect or wing-in-ground effect machines, which also puts limits on armour thickness. Their main weaponry is housed in a modular turret which puts limits on recoil distance, unlike MS with the greater recoil distance afforded by arm-wielded weapons. Since the turret usually has to bear secondary weapons in addition to the main gun, its traverse & elevation rates aren't superior to that of a mobile suit. The mobile suit can match this because it can traverse at more than one point simultaneously. The tank also has to expose its turret to fire from concealment, while a mobile suit doesn't have to expose anything more than its arm, a smaller target, to fire a hand-held weapon.

With the jamming & countermeasures available, the only really reliable targeting system is still visual acquisition, thus there is a great emphasis on optronics. This, and the widespread use of exotic armour types and active defense systems also limit the effectiveness of ATGM's. Targeting is as much a matter of a steady hand and sharp eyes as it is anything else.

Flowtanks were designed as cheap, fast vehicles which do not warrant the power and expense of MIUC fusion reactors and Trinary Drives. Since the absence of MIUC reactors precludes the use of beam weapons and I-field barriers, flowtanks, despite heavy armour, are vulnerable to the M-P beam weaponry present even in light MS. In fact, infantry with plasma tubes pose a significant threat all by themselves. When the appropriate terrain and transport space are available, a number of armed forces use flowtanks in the role of light cavalry or as flanking forces for their MS spearheads. Properly sited, they are also useful in the defense because of their low silhouette. Flowtanks are quite common in frontier systems, where their lower tech base, low costs and the lack of MS opposition make them quite popular, even though they usually require two crewmembers.
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:iconmikkow:
mikkow Featured By Owner Jul 27, 2005
I've been meaning to reply to this huge message :lol: but I realize you just have the upper edge in the knowledge. I'll just thank you for the insights and storytelling about the flowtanks and such :D Very interesting ideas you cooked up.
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:iconryujindx:
RyujinDX Featured By Owner Jul 27, 2005
In this case, the whole setting is tailor-made to make mobile suits the pre-eminent weapons of war, and a lot of the background material isn't in the gallery, so I'm glad to have an opportunity to blab about it. Actually, since my mobile suits also use modular construction techniques, it's possible to put the torso on a flowcraft chassis (shades of Armored Core!). Also, there's a loophole in the previous reply--it's perfectly possible to put a MIUC reactor from a light MS in a flowtank, giving it greater mobility and defensive capabilities. No one has simply felt that the added effectiveness outweighs the cost.
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:iconjoshdhallett:
JoshDHallett Featured By Owner Jun 30, 2005
I must ask, what do you read? Your knowledge of conventional, and futuristic, combat paraphernalia is quite astounding and I wouldn't mind acquiring the same type of knowledge.
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:iconryujindx:
RyujinDX Featured By Owner Jun 30, 2005
Let's see...part of it's due to the family's engineering bent, and I have a long-standing interest in military hardware, from the Stone Age to the present. The military books published by Salamander books, such as Modern Land Combat are recommended, although a bit out-of-date, and so are references from <emJane's. Some issues of Soldier of Fortune are also useful. The older hardware is well-covered by such books as The Medieval Knight and Archaeology of Weapons. As for the speculative stuff, I read a lot of books by Jerry Pournelle, Larry Niven, David Drake & S.M. Stirling. Masamune Shirow's Appleseed is also very influential to me. Mechanical design-wise, it's Shirow again and Hajime Katoki as primary influences.
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:iconjoshdhallett:
JoshDHallett Featured By Owner Jun 30, 2005
That is quite a reading list, are you planning on entering the field of engineering yourself one day, or is this technical knowledge purely for artistic purposes (of course, art and engineering are not completely separate from each other)? By the way, you are an excellent writer from what I can tell, and I think you would excel at writing works of science fiction. Keep up the incredible work. I’ll be sure to monitor your progress.
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:iconryujindx:
RyujinDX Featured By Owner Jul 6, 2005
Actually, I am an engineer. This is one way of relaxing, while still taking advantage of my job-related skills. I also wrote quite a bit during high school and college. I could've taken up Creative Writing for a second course, but chose Visual Design instead (should've been Industrial Design, but what's done is done).
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:iconarmalite:
Armalite Featured By Owner Jun 17, 2005
Hey, that's one nice mecha! I just find the fact that it says "Caution" on the barrel of the gun a bit ironic. It's like having a sign underneath a bomb saying "if dropped, stay clear!". Hehe :)
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:iconultramanzeta:
Ultramanzeta Featured By Owner May 5, 2005
Nice detail there.

;)
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:iconzenadorion:
zenadorion Featured By Owner Mar 29, 2005  Hobbyist Digital Artist
Well armed I love it! :eyes:
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:iconsydex:
SydeX Featured By Owner Mar 23, 2005  Professional General Artist
oohhh..... DAMN!!!!! :wow: man you pulled an awesome job there!!
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:icondeamon007:
Deamon007 Featured By Owner Mar 21, 2005  Hobbyist Digital Artist
cool :)

how do you come up with those great descriptions?
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:iconryujindx:
RyujinDX Featured By Owner Mar 22, 2005
I like to read a lot.
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:icondeamon007:
Deamon007 Featured By Owner Mar 22, 2005  Hobbyist Digital Artist
your discriptions are great so I hope you'll keep reading :)
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:iconryujindx:
RyujinDX Featured By Owner Mar 21, 2005
Thanks, everybody!
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:iconkamibahamut:
KamiBahamut Featured By Owner Mar 20, 2005
it's HUGE! I like it.
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:iconnch85:
NCH85 Featured By Owner Mar 20, 2005  Hobbyist Artist
man, this one is good. the whole design to it. yeah, this one u got it right.
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:iconryujindx:
RyujinDX Featured By Owner Mar 21, 2005
Yeah, I was doodling and everything just clicked into place.
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:iconblackswordsman28:
blackswordsman28 Featured By Owner Mar 19, 2005
Landmates indeed...

I thought that when I saw its rifle

but as always great job
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:iconsercoe:
sercoe Featured By Owner Mar 19, 2005
awsome and well done as always. I like the shoulder mounted launcher.
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:iconhopeless-poet:
Hopeless-Poet Featured By Owner Mar 19, 2005
I think... I might cry because of your great mechanized unit drawings. They're awesome... and are so well colored. The weapons and the descriptions and scale from mech to human it is awesome.
Reply
:iconcombatanm:
combatanM Featured By Owner Mar 19, 2005
WHOA I don't know were to start?Brings a smile to my face to see such great work.MAD prpos!
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