Jetbike - History: Jetbikes are a nearly extinct form of archeotech that dates back to the earliest days of the Imperium of Man. During the Horus Heresy, many Space Marine Legions as well as other Imperial military forces, such as the Legio Custodes and the Sisters of Silence, also fielded Jetbikes.These gravity-impellor assisted, jet engine-propelled hovercraft were more akin to compact aircraft than ground-based Assault Bikes and were able to maintain great speeds for extended periods of low-altitude flight. Their lift-strength was sufficient not only to carry a heavily armoured Space Marine and his wargear aloft, but also to transport a variety of heavy weapons mounts and stocks of ammunition, giving the Astartes and other Imperial personnel who used them extremely potent firepower as well as excellent maneuverability.The Jetbike patterns in service with the Legiones Astartes were modifications of designs which considerably predated the Imperium and given the materials required to make and maintain them (such as the iridium-calicite alloys needed to fabricate the hyper-efficient anti-gravitic suspensor/repulsor plates required for flight), demand for them by the Legions always outstripped the supply provided by the Mechanicum.The last known Jetbike pattern that was built by the Imperium was the Mark XIV Bullock Pattern Jetbike, which was equipped with an integrated auto-drive as well as other additional specialised capabilities such as auto-targeters linked to the vehicle's weapons, an auspex, and an extensive suite of sensors capable of differentiating between biological lifeforms and inorganic energy emissions.Imperial Jetbikes were capable of both in-flight and hover modes. In combat, Imperial Jetbikes could be deployed by aerial-drop separation, a technique where a Jetbike would be dropped from a Stormbird while the aircraft was still in the sky.These formidable and sleek grav-craft allowed their riders to soar at great speed across the battlefield, held aloft by archaic anti-gravitic technology lost to the Tech-priests of the Adeptus Mechanicus in the 41st Millennium save for a few patterns of vehicles like the Land Speeder which were manufactured according to ancient patterns of a technology the tech-priests no longer understood. Only with the opening of the Great Rift and the resurrection of Primarch Roboute Guilliman, were tech-priests like Archmagos Dominus Belisarius Cawl allowed to pursue the technological innovation that made it possible to create new anti-gravitic vehicles for the first time in millennia.In the present of the 41st Millennium's Era Indomitus, Jetbikes are rarely, if ever, utilised by the Chapters of the Adeptus Astartes and their use is now entirely unknown to the units of the Astra Militarum. Those few Chapters that are fortunate enough to maintain some examples of this bygone technology are privileged to ride to war on ancient machines painstakingly maintained since the days of the Great Crusade.Armed with ferocious twin-linked bolters or a Plasma Cannon, the Imperial Jetbike is feared by the Space Marines' foes. One of the last known examples of an Imperial Jetbike is maintained by the elite Ravenwing (2nd Company) of the Dark Angels Chapter, which possesses a single Venerable Jetbike which is utilised by its Grand Master Sammael. Sammael is able to launch lightning fast assaults and ride down the enemies of the Chapter from astride his ancient steed.