Fuel rod

"It’s so weird. I don’t know who first called it a fuel rod gun, but it’s kind’a funny. I suppose the projectile is reminiscent of how you might expect to see a nuclear fuel rod depicted in a gee eh cartoon—all glowing green and throwing off sparks."

- Anonymous E2-BAG/1/7 serviceman.

Fuel rods (Sangheili: Ket-lambdatha) are a colloquial nickname given by human personnel for a form of explosive munition used in several Covenant weapon systems.

Overview
The ket-lambathda gained their human-given nicknames from their appearance, visually resembling popular culture depictions of nuclear fuel rods. Despite this, the technology has very little in common with nuclear technology. Fuel rods consist of caseless, transparent projectiles containing incendiary gel - a radioactive substance composed of energetic meta-materials and strained-bond lattices—an imperfect form of Forerunner infusion gel.

When the fuel rod weapon is fired, the radioactive chemical inside the fuel rod is ignited and launched from its containment shell, exploding on impact with a surface or once enough gas has been expelled from the projectile to reach environmental equilibrium.

Usage
Fuel rods are primarily employed by the Covenant in anti-armor and anti-air roles, fired by their fuel rod guns and fuel rod cannons. The visibility of the fuel rod projectiles in flight give them a distinct psychological effect on enemy soldiers, which helps in their intimidation value. Fuel rods fired by vehicle-mounted cannons can be guided by remote lock-on, while those fired from infantry-mounted weapons typically fire with a pronounced arc allowing them to be used as an indirect-fire mortar.

The XM4600 Zeus plasma munition howitzer developed by the United Nations Space Command during the Human-Covenant War utilises fuel rods encased in a custom 320mm shell.

Variants
At least two variants of fuel rod munition have been catalogued by the UNSC;

Class-2
Class-2 fuel rod projectiles are unguided and 38 mm in diameter. They are the primary projectile fired by infantry-portable fuel rod guns including the, , and s, alongside some variants of assault cannon.

Class-3
The fuel rod cannons mounted on the and s, alongside those of the Banshee use the heavier Class-3 fuel rods, which have a greater range and a capability to track heat signatures. The Morsam-pattern Seraph is additionally equipped with four fuel rod cannons, which are capable of locking onto air targets.

Etymology
Though widely used among UNSC personnel, "fuel rod" is actually an informal term supposedly originating from common popular culture depictions of nuclear fuel rods. Rumors surround fuel rods, with many UNSC Marines under the apparent belief that even carrying a weapon that uses them for ammunition can cause Boren's Syndrome.

List of appearances

 * Halo: The Fall of Reach
 * Halo: Combat Evolved
 * Halo: The Flood
 * Halo: First Strike
 * Halo 2
 * Halo: Ghosts of Onyx
 * Halo: Landfall
 * Halo: Combat
 * Halo: Last One Standing
 * Halo: Uprising
 * Halo 3
 * Halo Wars
 * The Life
 * Halo 3: ODST
 * Halo Legends
 * Origins
 * Prototype
 * The Babysitter


 * Halo: Evolutions - Essential Tales of the Halo Universe
 * Dirt
 * The Return
 * Halo: Blood Line
 * Remember Reach
 * Deliver Hope
 * Halo: Reach
 * ''Halo: Fall of Reach
 * ''Covenant
 * ''Invasion
 * Halo: Combat Evolved Anniversary
 * Terminals
 * Halo: The Thursday War
 * Halo 4
 * Spartan Ops
 * Halo: Spartan Assault
 * Halo 2: Anniversary
 * Halo 5: Guardians
 * Halo Wars 2
 * Halo: Envoy
 * Halo: Shadows of Reach
 * Halo: Divine Wind