Connor MacLeod wrote:I bleieve they were mentioend in the later "Vehicle design rules" too in the Chapter approved books (and were still considered "canon" as far as I could tell from there.)NecronLord wrote:Imperial Army Grav Attack Tanks are in The Horus Heresy Artbook. They are based on a scratchbuilt model by Rick Priestly Here
Though that is painted to match blue painted space marines (Crimson fists, IIRC); the Imperial Army version was coloured in a more camoflaged colour. It mounts some kind of beam weapon, and three missile tubes. Additionally, the Custodes and Sisters of Silence fielded a hovering form of rhino, which they used in their attempt to claim part of the webway.
The last evidence of Imperial grav tanks in production comes from mention of a 'grav tank factory' on Stalinvast in the Inquisition War trilogy.
We know the Guard does make use of grav-tech in other ways (Grav chutes, Dropships from Tactica imperialis, as well as jump packs like in Guns of Tanith) so its probably not impossible for the Guard to be running around with Grav vehicles of some kind, but they're probably going to be rarer due to the fact they'd likely come from older/more techy worlds (veryr old civilized/industrial/hive worlds likely, or more likely forge worlds.) Hell, there are Guard regiments that have valkyries, Vultures, and even Predators/Rhinos depending on your source
There's going to be another reason why grav attack vehicles wouldn't be frequently employed and that's maintenance and logistics. Treads and Tires will be easy to replace/rebuild, and
I'm also going to go out on a limb and note that the "Codex" speeds indicated in the Imperial Armour books aren't always "the defining line" - There are examples of Thunderhawks going near-hypersonic or reaching drop pod insertion velocities (the Deathwatch books and the recent Blood angels novel), of Thunderbolts going over their top speed (Double Eagle) as well as Russes exceeding their own top speed (Storm of Iron, Honour Guard, the Gunheads short story in Planetkill etc.) Hell, the older IA books had a short story by Gav Thorpe mentioned that Russes could be uprated for higher speeds (though the AdMech would shit a brick if they found out.) - as Thanatos has noted to me before, Russes are clearly governed for maintenance purposes but they can be boosted to FAR higher speeds.
There's also the fact Conquerors are supposed to be a lighter, faster variant desinged to keep up with Titans, ,yet are somehow still as slow as a Russ (slightly slower in fact, despite carrying a lighter gun) as well as the Destroyer Tank Hunter variant (Russ pattern hull, nearly the same mass as a Russ, but can pull far higher top speeds.)
I'll note as well that Chimeras can be and have been converted into tanks (A pseudo-predator in that context.)
Edit: Besides, I'd also add that most "grav tanks" tend to be more of a hybrid "tank/gunship" idea... just a much heavier version of a land raider (or Vulture.) I imagine if you upgunned a Vulture you'd get similar results.
(I presume you mean Land Speeder) Yeah, they're in the VDR, but it's not clear what use that's for. Presumably some built for the Imperial Army could still be in service ten thousand years later, especially with Space Marines.