Thanix cannon

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Thanix cannon firing
Thanix cannon mount on the Normandy SR-2

A Thanix magneto-hydrodynamic cannon is an advanced mass accelerator weapon developed by the Turian Heirarchy, based on salvaged components of the main weapon of the Reaper, Sovereign.


The Thanix cannon fires a stream of molten metal -- a mix of iron, tungsten, and uranium -- that has been shaped into an armor piercing bolt. The mass accelerator propels this stream toward the target at a significant fraction of lightspeed. The heat and extended impact of the bolt make it more effective at penetrating kinetic barriers than conventional mass accelerator slugs, and the nature of the cannon is supposed to circumvent the normal length limitations of mass accelerators.

The exact firepower of the weapon isn't specified, but it is stated that a Thanix cannon mounted on a frigate or fighter can carry the firepower of a cruiser's mass accelerator. This presumably means it has less firepower than a dreadnought's mass accelerator, which delivers about 38 kt of energy per shot. Assuming that a cruiser's mass accelerator is about half as long as a dreadnought's (and otherwise the same), the projectile would have 1/4 the kinetic energy, or around 10 kt, and a frigate's Thanix cannon would be comparable.

Just two shots from the Thanix cannon mounted on the Normandy SR-2 were sufficient to destroy a Collector cruiser. The Reaper weapon upon which it is based can deliver hundreds of kilotons of energy in a single shot, but it is part of a much larger warship.


In the aftermath of the Battle of the Citadel, all of the Citadel powers scrambled to salvage debris from the destroyed Reaper. The turians recovered significant portions of Sovereign's main gun, and within two years they had developed the prototype Thanix cannon. Calling upon his contacts in Citadel Security and the Turian Hierarchy, Garrus Vakarian was able to obtain plans and components to have a Thanix cannon installed on the Normandy.

Specifications for the Thanix cannon proliferated, making them common upgrades for warships and starfighters among the Citadel races.