“In fact, China is an area bomber at most.” The quoted words of General Stephen Davis of the Air Force Global Strike Command can be seen as the conflict at the core of the Xi-an H-20 story, a program marketed as a strategic breakthrough, combined with ongoing indications of the fact that the most difficult engineering task of long-range stealth aviation is not over yet.
To engineers and defense planners, the H-20 is more a test of whether China can transform industrial reach into an ability that is complex and heavy with the support it demands. The manufacturing base in China has come to be a hallmark of its national strength and it has already started exhibiting combat-aircraft lineups of the fifth generation with the J-20 being one of them. The H-20 will be designed to be a continuation of that trajectory into the most challenging type of aircraft to design, build, and maintain: the subsonic flying-wing bomber being low-observability maximized.
The H-20 is an aircraft that is more of a frequently described than a demonstrated aircraft in the public. It was announced as developed in September 2016 and there are occasional official statements that it was making progress without providing the concrete indicators that usually accompany the first flight of a new plane. The same trend can be observed in the case of anticipated unveilings that again never occurred and the “program” maturity is quite hard to determine externally. Such ambiguity is also not peculiar to stealth aviation, but makes making any confident prediction about when a bomber becomes a concept instead of a trainable, deployable system more difficult.
The H-20 strategic narration is propelled by range and payload figures. The U.S. Department of Defense has outlined the hopes of a flying-wing bomber that has a range of at least 8,500 km and a payload of at least 10 tonnes, which would increase the reach of China in countering distant targets when used with long-range air-lauded munitions. The H-20 in that framing stabilizes an air-brought leg of a greater deterrent pose, as well as straining defenses over extensive sea paths. That is the promise. Integration is the limitation.
The similarity in planform with the B-2 or B-21 does not make a credible long-range stealth bomber, and it is the concealed architecture that renders the airplane survivable and dependable in repeated sorties. The design of inlets must be consistent with low-observable shaping, management of exhaust, radar absorbing material, wiring discipline, access panels, maintenance of coatings, and the flight-control statutes demanded by a tailless wing. Carriage of weapons presents a complexity of its own: bay doors, racks, ejection forces, thermal effects, and mission-system timing that all have to operate without caused signature degradation. Although the China materials science and industrial through-put might be good, the program still must come to a fixed configuration, then test it.
Current analysis has characterized the H-20 as progress that seems to have been “frozen over time” relative to the swifter paced Chinese fighter projects. That engineering perspective indicates that contrast. Fighters can easily go through prototypes quickly, and a bomber with inter-theater range size introduces more structural margins, more mission-system integration and a sustainment overhead which only slows design modification after it solidifies the configuration.
The H-20 exceeds single-platform question at Fleet size. The B-2 bombers available to the United States include 19 of them with 19 more of B-21 still climbing to service. The potential advantage to China does not lie in the fact that it has a “better” flying wing, but in the ability to make sufficient numbers of them so as to make planning with volume, readiness and dispersal choices a problem. It is not factory capacity that determines whether the H-20 can do so, but the engines that are capable of reaching quality reliability, the coating and structure that can be kept up to speed, and a training-and-logistics organization redesigned to an all-bomber force, not a regional strike force.
Finally the importance of the H-20 is at the convergence of ambition and industrial implementation: a program that should transform national capability into what is deployable, maintainable and operable as a system whether silently, repetitively and at mass.
