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Reply Hangar 1: Infantry Weapons/ Armor- And Attachment weapons
MAC Gun (Magnetic Assisted Cannon)

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Suicidesoldier#1
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PostPosted: Fri Jul 16, 2010 1:27 pm


MAC Gun (Magnetic Assisted Cannon)


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Weapon Name- MAC Gun (Magnetic Assisted Cannon)
Round Type- 120mm (4.7) Rheinmetall Ammunition
Over-all length- 6.6 meters (7.2 yd), 21.6 feet
Barrel length- 55 calibers (120mm x 55, or 6.6 meters)
Weight- 7,310 lb (3322 Kg)
Rate of Fire- 12 RPM
Feed Mechanism- 1-round internal magazine (Although autoloaders can load each round like it's semiautomatic)
Round Capacity- 1
Effective Range- 8000 meters (5 miles), 16,000 meters with Magnetic Assistance
Range- Unverified
Accuracy- 2.05 MOA
Accessories- N/A
Quick switch firing mechanism- N/A
Scope/Sights- Internal Monitor
Muzzle Velocity- 1810 m/s with Uranium Penetrator, 2310 m/s with Uranium Penetrator and Magnetic Assistance
Firing System- M256 120mm Gun
Miscellaneous/electronic information- Basically identical to the Rheinmetall 120 mm gun except for the Magnetic Assistance






Basic Information


The weapon is basically identical to the Rheinmetall 120 mm gun except for the Magnetic Assistance it provides on specialized Depleted Uranium/iron rounds. The rounds are basically identical to the 8.35 kilogram M829 in shape, size, and application except for the fact that the one used in the MAC gun is roughly 7.82 kilograms due to it's composition of roughly 10% iron, and 90% uranium (with other trace elements, such as Zinc which form a staballoy). The iron acts as a super ferro-magnetic material, and increases the felt effect of the magnetic field in the paramagnetic permeability of the depleted uranium, allowing it to achieve a higher level of efficiency per round.

The magnetic system operates very simply, being a very base type of rail gun. A large innovative factor of the weapon is that it uses magnetic disks rather than magnets on the side, which increase it's ability to transfer a magnetic charge to the round over something with a purely lateral magnetic propulsion system. Another innovative factor is in the concept that it uses a base propulsion system to quadruple it's energy levels rather than attempting to do so on it's own, which increases it's efficiency levels and allows the weapon to use conventional ammunition with little problem. The weapon is essentially a hybrid railgun gunpowder propellant projectile propulsion system, that utilizes two forms of energy to increase it's capability and efficiency. Why the weapon is capable of achieving otherwise fundamentally impossible capabilities, especially in relevance to it's size, is primary associated with it's hybrid operation, and the exploitation of basic physics. Energy, in joules (metric) is 1/2 (mass)(velocity) squared, which in this application quickly translates to two things- by doubling the velocity you quadruple the energy, and by doubling the mass you only decrease the velocity by roughly 29.4% (1000 m/s down to 708 m/s and 708 m/s down to 500 m/s, by doubling the mass, which in turn translates to eight times the inertia for only halfing the velocity). Velocity is much harder to increase in straight linear applications, and is why using Railguns or high grade Propellants lends itself problems in achieving high energy levels (as does everything else). However, Rail guns in particular exponentially increase their capabilities. In rail gun and most magnetic gun (or projectile launcher) applications, typically, the higher the velocity of an object is the faster it speeds up.

Sometimes this is a flat acceleration rate- for example, a 1 gram projectile requires .1 joules to speed up from 0 m/s to 10 m/s, were as to speed up from 10 m/s to 20 m/s it requires .3 Joules. This is because it requires four times as much energy to double the velocity of mass, which means that a constant, steady acceleration would result in an exponential increase in energy.

This also means that a direct initial velocity translates into an exponential increase. The equation for said velocity increase is V=u+L'/2m * (integral 0→t) I2dt, with U being the initial velocity. Disregarding the other bit of the equation, this basically translates that initial velocity is a simple additive number to terminal velocity at the end of the rail gun. As stated before, a flat velocity increase or acceleration is of course, exponential in itself. What it means is that, the initial velocity of a projectile translates into a direct additive to the projectile velocity itself.

Basically, without an injection velocity, a normal rail gun or conventional artillery piece that could say, accelerate a 7.82 kilogram projectile to 500 m/s would require close to 1 million joules of energy. To accelerate a projectile to 1810 m/s would require roughly 12.52 million joules. To accelerate a projectile to 2310 m/s would require roughly 20.8 million joules, or a 500 m/s or a 27.5% velocity increase requires 166% more energy. With using the hybrid system, a railgun with an injection velocity of 1810 m/s need only 1 million joules of equivalent electricity to accelerate a projectile by 500 m/s, or to 2310 m/s, which in a linear system would require 8.28 joules of equivalent electricity.

While the energy requirement to accelerate the projectile is technically the same, as energy cannot be created or destroyed, the energy requirement on the devices in work is lowered. Instead, like in all magnetic accelerated projectiles, a large portion of the energy is gathered from the projectile, in the form of magnetic fields. While this may seem like the projectile depletes the projectile of energy or is seemingly endless, like in all electromagnetic forces, such as gravity, two opposing forces cancel each other out resulting in a net force required of 0. For instance, the gravity of the earth may seem endless in the idea that it can hold people and small objects down indefinitely without an energy requirement (objects without any assistance). However, what is forgotten is that a human applies the same amount of gravitational force to the earth that it receives from the earth; however the mass comparably of a human is usually drastically smaller, making the gravitational effect of a human to earth less noticeable when compared to the effect of the earth on the same human. The earth's gravitational force is high enough to apparently "Hold down a person" were as the gravitational force of the human appears to have little effect on the earth; even though it does have some effect.

With this in regard, it is easy to understand how a projectile using it's magnetic forces in a different matter would develop more energy with a lower single linear power source. The energy is always present, and the net forces cancel themselves out, however they are used in a different manner, chiefly in this case to propel a projectile at higher velocities.




What this translates to in a MAC gun is that 1 million watts (1 joule per second) of electricity and 12.52 million joules of propellant translates to roughly 20.8 million joules being transferred to the projectile, lowering the amount of energy required by the propulsion system to fire the projectile. Ideally, the amount of energy from each type of power source would be equal to achieve the highest potential in energy gains, which would be roughly 400%. However, due to extenuating circumstances, this being that explosive propellant acceleration is much easier to produce than electrical acceleration, the figure of the highest efficiency in terms of size and realistic application (not direct energy) is dependent mostly on the energy source of both the propellant and electricity, which is forever changing and would require a series of extremely complicated calculations on the specific capabilities of the propellant and the rail gun used in that particular application- which of course, would require intensive study, and probably would never be exact even so.
PostPosted: Fri Jul 16, 2010 5:10 pm


Extraneous Weapon Specifications

The weapon is essentially exactly the same as in the 120mm Rheinmetall cannon, except for the fact that it uses a series electromagnetic rings to help provide Magnetic Assistance for specific sabot rounds. The Magnetic Assistance is powered by a series of 18 rings spaced roughly 1 foot apart from each other. They rings span a distance that is slightly below the muzzle and slightly above the initial firing area. The rings are combined in a slightly adjacent direct unison with the barrel, to provide the strongest magnetic transference possible. The Railgun or, magnetic capabilities of the Cannon, are able to impart the equivalent of close to 1 million joules to an unassisted depleted Uranium/iron projectile.

In order for the electric rings to be correctly synchronized with the high velocity of the round, it uses a series of laser chronographers to calculate the speed between each passing magnet and to tell the magnet when to activate it's magnetic effects. The chronographs as well have the effect of being capable of tracking the speed of the round and to roughly estimate the muzzle velocity of each round as they leave the barrel and relay this information to an onboard computer.

The weapon, regardless of the power source, can only fire, at max, 12 rounds RPM due to complications involved with overheating. Due to the increase of modern propellants and the high velocities involved, the barrel life of the weapon is somewhere between 250 and 500 rounds, with 250 being the lowest and 500 being the estimated highest if purely one type of ammunition were to be used. In sustained combat, however, this is considered applicable and considerable in a weapon designed only to be fired in single, autonomous fire and designed only to engage multiple targets in direct unison to itself- and usually one round per target is enough to destroy said target. For instance, a Tank group engaging an enemy unit of tanks would only need to fire rounds at the amount of enemy tanks present; which, if the enemy force is within reason, will be similar to that of the amount of units in it's own party. Basically, given the estimated number of tactical targets that require attention and the estimated number of strategical targets that would require attention, a single barrel with a life of 250 rounds would more than adequately cover the life span of projected, estimated sustained combat. However, due to the excesses in training, testing, and the usage of Tanks which share extended combat experience using multiple crews, Tanks still get regular barrel replacement while under combat service.

Suicidesoldier#1
Captain

Fanatical Zealot

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Hangar 1: Infantry Weapons/ Armor- And Attachment weapons

 
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