Current PLAAF and PLANAF bomber fleet is comprised of old H6 aircraft, we all know that. No matter how useful those planes are, fact is that they all have a limited lifespan, and after all these decades they're already quite used. Also, fact of the matter is they're old tech, offering sort of abysmal performace when compared to a modern day bomber. So, it is obvious china wants to replace them with new planes, sooner or later.
In the short term, buying foreign bombers does have its advantages and will probably be done. But looking at the problem more long term, with China's continued economic and technological growth and also having in mind that dependance on other party's tech/supplies can be risky - it is obvious china will some day go for it's own, indigenously designed and built bomber aircraft.
So far everything seems clear, somethign i'd hope most of you would agree on with me. Now i'll proceed with my private view on the course that such a bomber developtment program should take.
I think it would be a mistake to go for a high tech, pushing the envelope plane, even in chinese terms. The much talked about j-xx plane programme is pretty much that - it seems to be designed as a giant leap in terms of abilities and tech that is required to pull all that off. Such approach takes literally decades and while in the end it may supply you with tremendous plane, it also means you have those two or more decades worth of risk not having any significant improvements in your abilities.
So i suggest this: Pick a design route that shows most promise and room for improvement and start small. In this case, designing a bomber, i hope china goes with a blended/flying wing design. Of course, making a B2 copy would pretty much be the equivalent of 20 or more year development process. So why not start with older and tried out design that is known for a fact to work well? I am talking something not unlike the old british avro vulcan bomber.
Perhaps with less of delta and bit more of a classical swept wing, bigger wingspan and less of a protruding nose section. Classical T shaped tail section can remain if no horizonal tail surfaces proves too much of a challenge. Remember, point is to keep it simple. Use mostly off the shelf tech, engines that are already available, materials that are available (meaning not more composites than j10 has, for example), etc. Even with such an approach, the leap in capabilities over the H6 bomber would be huge.
Development time would be short, i'm thinking just years, development cost fairly low. Goal would be to make a limited production run and start testing the final product. Perhaps like 10-12 aircraft would enter PLAAF and be used to gain knowledge, offer new ideas in design from the usage, just evaluate the plane in the best way possible - by using it.
Of course, with the start of production of first generation bomber, development would not stop. On the contrary. Various improvement would be made, very likely helped by the input of actual service of first gen bomber. During this process foreign bought bombers could and probably would also be used, actually they'd form the majority of the force until the indigenous bomber program matures.
Every 6-8 years an improved design could/would be brought to manufacture, every incarnation featuring better tech. stronger engines, more composites, better avionics suite, changes on the outer design itself - aiming at getting rid of the classic style tail, first perhaps just the vertical stabilizator in the second generation, then maybe smaller twin stabilizators aiming for more stealth in third generation, then no tail surfaces at all in fourth.
Of course goals put in front of the program would be bigger, more stealth, more payload, bigger range. But it'd all be in relatively small increments. First generation could for example carry 12 tons to japan and back without refuelling, third generation could do the same to guam. last generation should be able to be a true intercontinental bomber.
Eventually, after some 18-24 years there china would/could posess a stealthy flying wing plane with impressive abilities. Its steady development would be more certain than one huge leapfrog discussed in the beginning of this post, and the final result would most probably be superior too, since there are decade(s) of actual experience behind this continuously evolving design. Just like the US... they couldn't have built the B2 like it is now without first building the stratofortress, the hustler, the aardvark, nighthawk, lancer before it. Most importantly, during those 18-24 years there would be bombers to count on. Not just the previously bought foreign ones, but the dozen or so first gen indigenous ones, further dozen second gen, another dozen third gen and so on. Small series, small batches. Not unlike the incremental improvements that PLAN is getting on their small (usually two ships per generation) batches of new vessels.
Since speed and range are on a certain level mutually exclusive, long term program like this would produce a high subsonic bomber, again just like B2. I am however thinking that any sort of conflict in the early years, when china still doesnt have a major projection of power beyond its borders, could benefit more from speed than range. Therefore i would suggest that the foreign bought bombers be supersonic, not unlike commonly suggested su-34 and backfire (backfires maximum range would probably not be used anyway, so good deal of the time in air the plane could use its great max speed, a very useful thing in hit and run raids china would most probably be involved in any kind of pre 2030 war against a strong enemy)
In the short term, buying foreign bombers does have its advantages and will probably be done. But looking at the problem more long term, with China's continued economic and technological growth and also having in mind that dependance on other party's tech/supplies can be risky - it is obvious china will some day go for it's own, indigenously designed and built bomber aircraft.
So far everything seems clear, somethign i'd hope most of you would agree on with me. Now i'll proceed with my private view on the course that such a bomber developtment program should take.
I think it would be a mistake to go for a high tech, pushing the envelope plane, even in chinese terms. The much talked about j-xx plane programme is pretty much that - it seems to be designed as a giant leap in terms of abilities and tech that is required to pull all that off. Such approach takes literally decades and while in the end it may supply you with tremendous plane, it also means you have those two or more decades worth of risk not having any significant improvements in your abilities.
So i suggest this: Pick a design route that shows most promise and room for improvement and start small. In this case, designing a bomber, i hope china goes with a blended/flying wing design. Of course, making a B2 copy would pretty much be the equivalent of 20 or more year development process. So why not start with older and tried out design that is known for a fact to work well? I am talking something not unlike the old british avro vulcan bomber.
Perhaps with less of delta and bit more of a classical swept wing, bigger wingspan and less of a protruding nose section. Classical T shaped tail section can remain if no horizonal tail surfaces proves too much of a challenge. Remember, point is to keep it simple. Use mostly off the shelf tech, engines that are already available, materials that are available (meaning not more composites than j10 has, for example), etc. Even with such an approach, the leap in capabilities over the H6 bomber would be huge.
Development time would be short, i'm thinking just years, development cost fairly low. Goal would be to make a limited production run and start testing the final product. Perhaps like 10-12 aircraft would enter PLAAF and be used to gain knowledge, offer new ideas in design from the usage, just evaluate the plane in the best way possible - by using it.
Of course, with the start of production of first generation bomber, development would not stop. On the contrary. Various improvement would be made, very likely helped by the input of actual service of first gen bomber. During this process foreign bought bombers could and probably would also be used, actually they'd form the majority of the force until the indigenous bomber program matures.
Every 6-8 years an improved design could/would be brought to manufacture, every incarnation featuring better tech. stronger engines, more composites, better avionics suite, changes on the outer design itself - aiming at getting rid of the classic style tail, first perhaps just the vertical stabilizator in the second generation, then maybe smaller twin stabilizators aiming for more stealth in third generation, then no tail surfaces at all in fourth.
Of course goals put in front of the program would be bigger, more stealth, more payload, bigger range. But it'd all be in relatively small increments. First generation could for example carry 12 tons to japan and back without refuelling, third generation could do the same to guam. last generation should be able to be a true intercontinental bomber.
Eventually, after some 18-24 years there china would/could posess a stealthy flying wing plane with impressive abilities. Its steady development would be more certain than one huge leapfrog discussed in the beginning of this post, and the final result would most probably be superior too, since there are decade(s) of actual experience behind this continuously evolving design. Just like the US... they couldn't have built the B2 like it is now without first building the stratofortress, the hustler, the aardvark, nighthawk, lancer before it. Most importantly, during those 18-24 years there would be bombers to count on. Not just the previously bought foreign ones, but the dozen or so first gen indigenous ones, further dozen second gen, another dozen third gen and so on. Small series, small batches. Not unlike the incremental improvements that PLAN is getting on their small (usually two ships per generation) batches of new vessels.
Since speed and range are on a certain level mutually exclusive, long term program like this would produce a high subsonic bomber, again just like B2. I am however thinking that any sort of conflict in the early years, when china still doesnt have a major projection of power beyond its borders, could benefit more from speed than range. Therefore i would suggest that the foreign bought bombers be supersonic, not unlike commonly suggested su-34 and backfire (backfires maximum range would probably not be used anyway, so good deal of the time in air the plane could use its great max speed, a very useful thing in hit and run raids china would most probably be involved in any kind of pre 2030 war against a strong enemy)