We don't know if the KJ500 is fit to meet the dynamically evolving demands of PLA. Till 2019, a war with India was only a very remote possibility. We don't know if the aircraft has some sort of limitations regarding electronics, survivability or range.
China not only has to focus on the SCS but also India. Your points regarding runway tolerances was good in that, China is expanding airfields in Tibet and the Ladakh/ Kashmir conflict would see Aircrafts trying to takeoff from poor runways and at altitude. Do we know if the KJ500 is performing remarkably in that theatre ? Anyway, both KJ500 and Y20 had made appearances in Tibet. Chinese newspapers have run articles on Y20 becoming a template for more variants.
It’s operations in Tibet prove that it’s capable of a wide array of operations. Y9 Y8 are both derived from the AN12 which was the Soviet answer to the C130. India has made extensive use of the AN12 for its needs so we know that it’s able to operate in Hot and high as well as very high.
There is more to an AWACS platform than just the radar. You have the operators directing air traffic and coordinating missions. Replacing this with drones is simply not doable. At best you can use drones to extend the sensor envelope but they can't do the coordination.
Just not doable today, Increasingly Datalinks are taking over from operators with computers or data relayed to a control center on the ground. Currently though the power requirements for an AEW drone are just not there.
Most drones even jet powered are still single engine. Most AEW are twin as the radar is quite power hungry. Fifth generation fighters and likely Sixth generation will be designed less dependent on AWACS due to the fact that the AWACS are high signature targets.
Many are talking about moving the next development of Awacs to satellite based operations. It’s immature at this point but possible.
Well, you could put much bigger and much more powerful AESA radar and also you could more engineers there and much more electronics, even supercomputer. Also, extended range and ..... perhaps some SAM, just in case
Yes I covered that. However it’s questionable as already the Radar on AWACS are exceptionally powerful. Why would you need bigger?
Not sure what more Engineers would do for you. Unless you me operators okay but It seems like even Kj500 has the space for a rest area where more crew could be waiting to switch with the active one.
More electronics is an option I covered that as an option IE a multi model theater control. The SAAB Globaleye is capable of both AWACS and Surface scan. But generally you run into issues of interference the more different sensors you add.
They already have excellent computers in modern aviation and AEWs short of a quantum computer. Problem is that the Uber fast super complicated computer systems are sensitive to power and delicate to the point that operating on a plane is out of the question. A couple hard bumps the whole thing shatters.
Range could be achieved by many means not just brute forcing of a bigger aircraft. I have pointed this out a number of times but if it’s all about range take the Y20 airframe and build a tanker. That would increase your range and time of operating to be maximized only by the human crew.
It’s an Aircraft any missiles on it would be Air to air. But what does it buy you? Not a lot more trade offs than trade ons. Besides the main threat isn’t a fighter sneaking in to make a close kill that could be swatted by a missile shot it’s a fighter launching an anti radar missile from long range and letting the Giant radar on top of the plane guide it in to the kill. Countermeasure are an option but you don’t need a huge quad jet for those.