Oh, wow, that design is terrible. It uses spokes, spokes are, like, the worst space-efficiency ever. And it makes a loud explosion. So now, instead of our aircraft exploding and the pieces plummeting to the ground we now have aircraft that make a loud noise and then plummet to the ground to explode into pieces.
Does something that big even fit inside a protector?
Do they work if placed on their sides?
The Unicaru
We have seen the horrible stability of the misguided "avenger". and the solution was blindingly simple. Anyone who has held a suit of armour knows that it is far more easily held upright when grasped from the top than the bottom. The Unicaru features a "mohawk" of crystal along its top-central line, attached to a "cowl" of crystal containing the propulsion effect, which constantly pushes the cowl upwards, lifting the craft. The weight of the remainder of the craft ensures its lower position.
To achieve this, we put the vast majority of our efforts into refining our existing propulsion. Given that everything else basically amount's to bodywork or circuitry, it should not be difficult to dedicate massive focus onto the propulsion system. the hoped results are a pure "force film" that perfectly conforms to a surface and pushes that surface dynamically without any other interaction. There is no exhaust typical of an explosion, instead the surface will be pushed by this film regardless of its surroundings. This in turn allows the ceiling cowl to fit very snugly around the vessel and continuously propel it in an absolute up direction.
Force-film panels around the rear of the craft allow rapid steering, directing a relative left/right/pitch/yaw. The main-body is tear-drop shaped with the "ball" at the front and a tube sticking into the tail, with the tail being geometric rather than rounded, to ease the steering operation. (A more precise control over the circuitry would be required to make use of a curved steering surface.) As nice as it would be to have the full efficiency of a force-film "sail" providing thrust, such just isn't practical without making the craft an needlessly large target. Instead, force-film is projected into the "tube" with their propulsion set to a relative backwards. In addition, a handful of magems are stored in the tube to power brief bursts of the outdated Kinetic Propulsion Drive which, while horribly unstable and inefficient, would provide a great burst of power when operated within a tube like that. granting brief bursts of speed when needed.
The pilot lays down near the underside of the craft, on a leather hammock with leg-braces with their head raised due to a mild incline. They operate the rear steering panels with a four-way lever, and have a pair of two-way levers to control the force of the lifting cowl and main thrust, with a big red button to activate and deactivate the burst-propulsion. The pilot enters through a hatch on the floor of the gunner's booth, in which the gunner stands, wearing a leather harness hanging from the ceiling. the harness is on a simple weighted pulley, with a weighted anchor on a leather strap going through a pulley. this is very simple, being a rope through a hole with things attached to either end to stop it being pulled through. The anchor goes into its own separate shaft and thus cannot enter the cabin. Thus the harness reduces the gunner's effective weight, easing their ability to stand and bracing them against falling. The gunner shoots a standard hac one that is forward-mounted through a hinge(derived from our steam-transmission mechanisms) at its centre-of-gravity allowing it to be easily and quickly aimed. Communication between pilot and gunner is achieve through a simple string mechanisms where identically-labelled tabs are attached to the same string, allowing a pull on one to be seen upon the other. The power systems are mounted behind the gunner, either side of the central thrust-tube.
After wasting so much time on aircraft we now need a dedicated air-superiority fighter in order to recoup our losses. the Avenger's fighter-bomber nature just doesn't fit on this battlefield as anything other than support, although it should serve quite well as close air support... The lightning fails to change its role at all. The propulsion is a constant pressure over the whole thing, we would need a computer to handle all the fine adjustments required to control it when the entire surface is a control surface. I proposed a computer, but we were too busy trying to protect a generator that was sufficiently armoured that it didn't matter and is still too big and expensive to actually use.
Roll And Shoot Heaps
A complete redesign of the Protector design. The rear wheels are replaced with a single roller. The passenger space is largely filled by the rear wheel and what remains is used for ammunition storage and magic generators. The front wheels are bigger and sturdier with a higher ground-clearance but the rear wheel can pull it back even if the front wheels break. It has only a single turret, though that turret is hopefully powered using the propulsion system from the Avenger. The turret contains a Mundane refitted to work from the much greater power generation of the vehicle's generator stacks. The top armour is heavier and the wheels have protective cowls and the doors(now instead mounted on both sides) are refined to more easily braced against external intrusion and can be levered back into a tight seal to protect against external conditions such as fire.
Flying is difficult and they are better than us at it and will continue to be so. There is no such thing as "final evolution of our aircraft" as whatever we do they can improve upon and nothing we do will ever set a permanent standard. We really need our guns to be fast, but mobile at least is a start and this would get us that. If someone proposes a properly fast gun wagon, or a means of overcoming their range advantage, such as heavier rounds, then I will probably vote for that, or state why I don't think that it will work.