User:BaconShelf/Sandbox5

"Nils Thune"

The magnetic accelerator cannon, also referred to as a mass accelerator cannon or MAC, is a type of heavy weapon system employed by humanity, primarily the spacecraft of the United Nations Space Command. Within the UNSC, MACs are defined as a heavy weapon that fires a sizeable ferric-tungsten round at supersonic velocities from the bow of a capital ship, orbital defense platform or mounted driver emplacement. MACs are coilguns employing Asynchronous Linear Induction Motor (ALIM) technology and are typically used in military applications, though similar technology can be used in civilian mass drivers for industrial use.

Overview
MACs are fitted as a standard armament on most UNSC Navy vessels, ranging from small s to s and even carriers or refit civilian ships such as the. With a handful of exceptions, MACs are typically spinally-mounted, meaning that the entire ship is built around the gun, with the cannon running a significant portion of the length of the ship's stern. However, the technology is not exclusively used in spinally-mounted MAC guns, with naval autocannons (themselves sometimes referred to as "MiniMACs") and even ground-based weapons such as the M68 Gauss cannon and M99 Stanchion operating on the same principle.

Operation
MACs operate on the basis of a coilgun. When firing, a series of stacked asynchronous linear induction motors are sequentially activated, propelling a projectile with vast amounts of kinetic energy. The construction of the weapon takes the form of a series of coiled conducting wires (or solenoids). When a solenoid is activated, the projectile is attracted to the coil. As the projectile reaches the coil, a second coil is activated, attracting the projectile further down the barrel of the gun. This process is repeated as the projectile travels the length of the gun, with each successive solenoid accelerating the projectile to higher and higher velocities. As such, the longer a MAC's length is, the faster the muzzle velocity of the fired projectile.

This process differs from that of a railgun - a similar weapon system which feeds electrical current through a projectile to accelerate it along two conducting rails.

To fire a MAC, UNSC ships must draw power from the fusion reactor into a series of capacitors, storing the generated energy for firing. As such, charging the MAC draws power away from other sub-systems such as engines. As such, a MAC can be pre-charged and fired when ready, though at the cost of power to the aforementioned systems. Without the charge being maintained, the charge level does deteriorate. However, MACs can be fired at lower charge levels than 100% though likely to lesser maximum velocity. Likewise, firing the weapon at lower charge rates would also allow the weapon to fire more often, if needed.

Ammunition
MACs are capable of firing a wide array of munitions, depending on bore and model. Some MAC rounds are extremely dense and constructed of ferric tungsten, noted by Captain Wallace of the frigate as a "heavy round". In the case of the MACs fitted onto the refit-colony ship, the rounds fired from its MACs are "ultra-light" or consist of depleted uranium slugs. The MAC of the Spirit of Fire was later modified in a special project conducted by Ellen Anders, resulting in a specialised MAC capable of firing rounds that emit an EMP upon impact. Other munitions that can be fired from MACs include semi-autonomous drone missiles and for the larger 27 metre guns of, even include cargo pods and small spacecraft. A special kind of MAC round fired by the refit- was composed of a ferrous core and an outer layer of tungsten carbide, which allows the round to splinter on impact with an enemy vessel similarly to the shredder rounds fired by an assault rifle.

Due to this variation, the masses, velocities and sizes of MAC projectiles can very, ranging from 10 metre-long, 160 ton models fired by frigates and cruisers, to 600 ton depleted uranium models fired by s up to 3,000 ton projectiles accelerated to "point four-tenths" of the speed of light by the orbital defense platforms above Reach. The MACs of are additionally capable of firing various "sub-caliber" munitions for its massive twenty-seven metre bore, alongside some of the special types mentioned prior.

Usage
"MAC rounds? In atmosphere?"

- Jorge-052 exclaiming his alarm at the intent to fire the MAC of during the Fall of Reach.

As some of the largest and most destructive weapons available to humanity, their use is primarily constricted to space warfare. Most UNSC spacecraft are equipped with some form of spinal MAC gun, requiring the vessel to manually turn and face the target it wishes to fire on. MAC rounds are often fired in concentrated volleys by fleets of coordinated warships, and used as a long-ranged weapon for "sniping" enemy ships out of the sky. During the war against the Covenant, human MAC volleys were often fired in concentration, aiming to overload a target ship's energy shielding.

Atmospheric use and orbital bombardment
In select circumstances, MACs can be employed in-atmospheres or for the purposes of orbital bombardment. Such orbital bombardment can be deployed against large targets such as enemy warships or bases, or against targets as (relatively) small as a Scarab. During the Battle for Arcadia, the made liberal use of up to forty MAC strikes in rapid succession to destroy a Covenant staging area near the Arcadia ONI facility.

Types of MAC
MACs are primarily divided into two distinct classifications; light MACs and heavy MACs (also referred to as Light Coil and Heavy Coil). Overall MAC generations are denoted as Marks, with specific models given a unique identifying code. Heavy MACs appear to be typically fitted on mainline fighting vessels such as those of the and, while light MACs are predominantly fitted on lighter warships such as the Charon and Stalwart frigate classes, ships not intended as line warships such as the Epoch class carrier or ships historically considered under-gunned as capital ships, such as the.

Some of the largest MAC types, such as those found on select orbital defense platforms and large warships, are referred to as "Super MACs".

Mark II
The Mark II MAC is a light coil system, with its variants found on the Charon and Stalwart frigate classifications, alongside the Epoch-class carrier and refit Halcyon-class cruiser.
 * Mark II, Light Coil - 56A2D4/MAC - Employed on the  and post-refit Halcyon-class cruiser . On the Stalwart-class frigate, the gun is stored in the lower boom of the ship while the gun's pulsed power-storage and fire-control systems are stored in the upper hull. In the case of the refit Pillar of Autumn, the 56A2D4 runs two-thirds the length of the ship and employed special magnetic field recyclers along its length, that when combined with booster capacitors allowed the gun to fire three times in rapid succession.
 * Mark II, Light Coil - 52A6F9/MAC - Employed on the, this system is a rapid-fire variant of the 52A6D4 model. On an Epoch, this weapon is intended as a defensive weapon though it was sometimes employed to add to coordinated volleys of fire.
 * Mark II, Light Coil - 83B6R3/MAC - Employed on the.

Mark IV
The Mark IV MAC is installed on the.
 * Mark IV, Heavy Coil - 94B1E6/MAC - The 94B1E6 heavy MAC has twelve massive capacitor banks, allowing the Strident class firepower comparable to destroyers and light cruisers. This gun's limitation comes in the limited ammo supply carried aboard the ship.

Mark V
The Mark V MAC is part of the "Super MAC" classification of MAC. This MAC is the central armament of the orbital defense guns stationed over Reach in 2552 and the over Earth. The Mark V Superheavy MACs found over Reach were capable of accelerating a 3,000 ton projectile to "point four-tenths" of lightspeed.
 * Mark V, 14D4A1 MAC - Employed on the Moncton orbital defense platform, such as Cairo Station. This gun can accelerate multi-ton rounds to "several kilometres per second".

Mark IX
The Mark IX is a heavy MAC fitted on the.
 * Mark IX, Heavy Coil - 45J3D3/MAC - fitted onto the Autumn-class cruiser.

Series 8
The Series 8 MACs are fitted onto the - nameplay the lead ship of the class. Series 8s were intended for inclusion on the, though the weapons were since installed on Infinity as an upgrade package.
 * CR-03 Series 8 MAC - Initial model also known as the CR03S8 MAC. Fielded on, these guns have a twenty-seven metre bore.
 * CR-03B Series 8 MAC - Refit package model integrated late in 2558, though originally intended for the Eternity.

MAC batteries
"MAC batteries" refer to weapon systems in which multiple MACs are linked together as part of one weapon system. Such batteries may use differing bores and barrel lengths for different usage scenarios, or may consist of multiple identical guns.
 * 14B11R2 MAC battery - the dual MAC guns employed aboard the, consisting of twin-linked 1170mm/647mm MACs. The larger gun is used for firing all standard munition packages, while the smaller is only used for firing kinetic rounds.
 * 22B6R3 MAC battery - consisting of three eponymous 22B6R3 MACs, this battery was employed in the military refit module attached to the Spirit of Fire.

Corvette MACs
Even on the smallest end of UNSC spacecraft designs, the MAC is a staple feature - forming the bulk of the spinal mount on the 243 m-long. The Gladius mounts a single 20DA1C2 MAC, and is currently the smallest known vessel to mount a full-scale ship MAC.

Frigate MACs
UNSC frigates typically run the length of the entire ship, averaging a length of 183 m. Frigates in the Human-Covenant War typically employed light MACs. The Stalwart and Charon-classes equipped a 56A2D4 Light Coil MAC and an 83B6R3 Light Coil MAC, respectively, with the post-war Strident heavy frigate equipped with a Mark IV 94B1E6 heavy coil MAC. Despite being a heavy frigate, the Paris-class employed a light MAC.

On the Paris, Stalwart and Charon-classes of ship, the barrel of the gun itself is located in the lower boon at the fore of the ship, with the upper boon containing fire-control systems and pulsed power storage. The post-war is a unique exception to the typical rule of spinally-mounted MACs, instead employing a single MAC gun on a rotating turret on the ship's aft, allowing the gun to fire at targets around the ship. The heavy MAC employed by the Strident frigate employs twelve capacitor cells, allowing it to achieve firepower levels similar to those of destroyers or light cruisers - limited only by the stock of ammunition carried aboard ship.

Destroyer MACs
The heavy destroyer was the ship of its class to mount a MAC, sporting one gun and carrying only three slugs. The later Halberd-class was fitted with a 14B11R2 MAC battery consisting of dual twin-linked 1170mm/647mm MACs, with the smaller gun only used for launching kinetic kill rounds and the larger gun compatible with all standard mission packages. The Halberd is able to fire its MACs on lower-than 100% charge levels for more rapid-firing, and can be equipped with MAC capacitor cells to easily recharge; these cells are easily replacable when damaged.

Destroyers like the Halberd are typically organised into wolf-packs, aiming to coordinate MAC volleys on enemy ships and overwhelm their defenses.

Cruiser MACs
Unlike their smaller counterparts, cruisers typically employ Heavy MACs as a standard armament - befitting of their status as the primary line warship of the UNSC Navy. The sports two heavy MACs Late-war Marathons were in such high demand that even half-completed hulls were pressed into service for the use of their heavy MAC systems, often paired together with another Marathon as part of the "Gorgon" formation. These cruisers would pinpoint larger Covenant warships with sustained fire, giving smaller craft a chance to deal damage of their own.The Autumn-class heavy cruiser was fitted with a Mark IX heavy coil 45J3D3 MAC, and the a heavy MAC of its own.

Contrary to the aforementioned examples, the Halcyon-class light cruiser does not employ a heavy MAC, but rather a light one - likely the cause of the ship being infamous for being undergunned within the UNSC fleet. When refit for Operation: RED FLAG, the Pillar of Autumn was fitted with a specialised modification to a Mark II light coil 56A2D4 MAC - the same as that found on the Stalwart-class light frigate. This gun ran two-thirds the length of the Autumn's length, and employed special magnetic field recyclers that - when combined with booster capacitors - allowed the gun to fire three times in rapid succession.

Carrier MACs
UNSC carriers employ a range of MAC types. On the smaller end, the Epoch-class employs the Mark II 52A6F9 light coil MAC, a rapid-fire upgrade of that seen on the Stalwart-class cruiser and intended for defensive purposes. In larger fleets, the Epoch may lend this MAC's fire to coordinated volleys. The employs a larger heavy MAC, while the extremely large  employs two "Super-MACs", running the length of its enormous spaceframe. In addition to this, the Punic sports a number of smaller "Mini-MAC" turrets allowing it to fire on all angles.

Orbital defense platform MACs
Given their stationary nature, orbital defense platforms are able to employ much larger MACs than those employed on most warships, often dubbed "Super" MACs. The employed over Earth employed a single Mark V 14D4A1 MAC, purportedly capable of "putting a round clean through a Covenant capital ship". The 14D4A1 MAC employed on stations like Cairo Station employs hundreds of ALIM motors to line the barrel, capable of accelerating a projectile at multiple kilometres per-second. These stations employ stacked liquid-metal capacitor cells, allowing the gun to rapidly-cyce as long as their charge lasts.

The fortress-world Reach sported its own orbital defense guns, equipped with some of the most powerful MACs ever built. These rapid-firing MACs were connected to ground-based generators which allowed them to rapidly recharge and fire.