What's the range and service time with full fuel tanks?
What kind of terrain it can run? What kind of terrain slows it down and what stops it?
I'd wager that as being a hovercraft, it demands relatively smooth surface to run, ie. road, plain grassland, swamp or water... Moving through woods would be near impossible without massive thrusters that can boost it through woods. So, moving in a forest (not too dense) will go, but what if the terrain is too rough, so that the overpressure can no longer hover the craft, but it bites the dust?
Another thing - this thing seems ultra-heavy to me, so the power to product an air cushion of even 20 cm would be a pain in the arse for almost any powerplant (available today). On the other hand, just plug a fusion reactor into it and that's it for the power problems...
Though it would still have a powerful need of emergency boosters and retro rockets just to steer itself.
Hmm. It looks very very cool, but actually in a war it wouldn't be much of use anywhere else than Utah salt plains or similar desert regions. Forests and mountains would be very difficult terrains for that one, but on the other hand, so is the matter with traditional tanks.
I'd still take a tank rather than that. Or wait, I'd stay away from both (they are shot first) and just take a walk if I really had to choose.
OR perhaps it's not as much a hovercraft but uses some kind of repulsion lifters (tm)? Oh well, they'll have to equip it with chain tracks when they start running out of materials to build the technology needed to hover that gigant.
On the other hand, I'd say that there's a little bit too much vertical surface, especially on sides. A 112 mm Heavy one-time RPG APILAS can penetrate 700 mm of panzer steel if it hits it in straight angle, and guided AT missiles cause even more havoc... How thick is the armour? And what's the scale? If those cannons can reach 50 km, it'd be about the same size as the roller howizers of nowadays, or slightly bigger, eh? If it's that role, it would fit the role quite well, but using the build as an MBT might not be a good idea. Used by fast moving artillery units, it could really rock, and that's probably its main purpose. Put it in a front line and it'll be either stuck or crippled in terrain or attract the enemy by running on a road...
One good point in a hovercraft is that it'd hardly launch any mines - or would it? That would depend on the bottom surface area and its weight. If that thing is about 6x20 m (the size of the supporting air cushion) and weights 150 tons, then the point load on the road would be about... hmm... 150 000 kg*9,81 m/s^2 / 100 m^2 = 12 262,5 kg/m^2.
A finnish Telamiina (Anti-Vehicular mine) explodes when a weight of 150 kg's is exerted on the lid; after that the lid breaks up, making the detonator go boom along with 9,5 kg of TNT... The area which supports that 150 kg is roughly 0,03 m^2. That air cushion featured here exerts a force equivalent to 367,875 kg weight on that area of 0,03 m^2, so even a mechanical mine would actually explode.
Bigger problem still, if the mines are more sophisticated, magnetically detonating bottom mines (Pohjamiina)...
