Elheru Aran wrote:Lascannons=water cooled machine guns? I don't think so. They're more like 6pdr/75mm cannon or whatever. Now if you're talking the Land Raider Crusader, sure (six twin linked heavy bolters, twin linked assault cannon). But that's explicitly a close assault vehicle for breaking into fortifications and wreaking havoc among the defenders while the Assault Terminators exit and start breaking stuff.
A 75mm cannon would mean something differently, it'd actually pass into that 'tank threshold' of damaging material, but at that point you'd have to dump infantry for a lot of ammo space. Also probably mount at least a 100mm gun because its not actually going to end up as much bigger as you expect, the BMP-3 is very convincing on that approach to combat if you wanted want to do it. In real life we made 70mm grenade launchers, against the bigger enemies around that would kind of turn into what you functionally use against all the bigger infantry enemies. So kinda still like a heavy machine gun in its actual role in combat.
Maybe. Outright drone vehicles for driving make sense, but generally only if you have nobody alive in the vehicle. Such as resupply runs across fire swept ground, and vehicles carrying certain things you will need in real life scenarios but take up a lot of bulk, like a mine clearing line charge. But that's awful against the normal spirit of 40K....it gets us back to the world of radar-LOSAT vehicles networked together. An heavy engineering tank would be the most valuable location for drone AI if you had to choose just one, it's incredibly risky in an assault and also fairly simple work once certain principles are understood that are a lot simpler to model then an AI notionally able to engage enemy infantry on the ground.The cogitator is important because... reasons. Out of universe, there's no good reason to have an 'autopilot' or whatever on a tank. In universe... I can see it being a way to temporarily free up the driver to take over gunnery duties (directing the lascannon for example) while maximizing space inside the vehicle for Terminators or Honour Guard.
That would work, though it wouldn't be much reason not to build them without it. You should only need about a 1-14 ratio of things like that to be effective., company commander level.
Land Raiders are frequently used as the transport for Space Marine leadership, so it's not impossible that they use the cogitator to facilitate situational analysis and maximizing the efficiency of their troop dispositions.