Today’s invention is a design for a modular tank (or armoured fighting vehicle, if you will) which is a little like an eggbox.
A tracked chassis is used as usual, but within this base are housed hemispherical modules, each geometrically strong and heavily armoured. One, the crew module, would contain the vehicle controls -but without the weak point at which a normal turret attaches to the upper deck. This module would still rotate but only to allow crew to enter and leave through the hull when its underside hatches were deliberately aligned.
Control cables and a ventilation duct would penetrate this hemisphere via a central axle (these might even include video cabling, obviating the need for any windows in the crew compartment).
A second module would contain the vehicle’s engine and a third its armament (remotely controlled) and ammunition.
In this way the crew could be maximally protected from noise, fumes and external attack, whilst malfunctions of the vehicle’s main sub-units could be addressed by rapid, in-field substitution.