The Shenyang J-35 is constructed on a very modest boast: a stealthy carrier fighter with a capability to ride the new flat-top with a modern air force catapult-based wing. However, propulsion drives tend to determine what a construction can actually perform on the water, and the long-term engine “heart disease” frame of the J-35 has reappeared in a new manner that can hardly be overlooked.
A video broadcast on Chinese state television footage of the J-35 in the Fujian (Type 003) evoked examination since the jet seemed to be flying on an older engine, instead of the engine many were anticipating. In commentary carried by South Korean reporting, one commentator based on naval matters said that a Chinese commentator based in domestic expert opinion said that the J-35 fighter aircraft could take off only seven minutes when 900km away on the carrier. The term has since been shortened to describe the fundamental concern: a carrier fighter whose useful time on task disintegrates as soon as it drifts over to the fringes of an asserted radius.
That is more on a carrier than almost anywhere. On land, a fighter is able to trade fuel with runway range, divert options, and tanker access, which can be planned and repositioned with a relative degree of flexibility. A fighter launched off the deck is limited by a moving air field, recovery periods and the physics of slipping air to get airborne with sufficient fuel and armaments to be of use after the launch stroke. Fujian has a launch system which is aimed at assisting that, wherein the electromagnetic catapult system is employed to accelerate heavy aircraft to flying speed as quickly as possible, theoretically allowing heavier takeoff weights than with ski-jump operations. The catapults, however, cannot produce thrust margin within the airframe, so that when the engine lacks power or efficiency the jet compensates it either in the endurance or the payload or both. Such tradeoffs are particularly critical to a stealth aircraft since external tanks and stores cause immediate penalties on performance and signature.
The controversy has been not only reported about minutes. It is of what engine is really in readiness. The viewers had anticipated a shift to the WS-19, which is said to be under development since 2017, but the broadcast portrayal was seen as a sign of relying on the older WS-21 family. Concurrently, another rumor circulated on-line which stated that the leakage in terms of performance was that less than three minutes of sustained afterburner and approximately seven minutes of air-combat time were available after-launch in the WS-19/WS-21 combination when operating in demanding conditions. They are not explicitly confirmed in the given text, but they are consistent with the overall story: The aircraft engines industrial base in China has made impressive progress in terms of production volume and diversity, but the most challenging sections of it, such as reliability, durability of the hot section, constant thrust, and fuel efficiency still limit the potential offered by the newest airframes.
One such trick is that even the Chinese analysts have reportedly referred to propulsion as a “heart disease” which is an uncharacteristically crude term in a regime that usually brands major programs as prestige products. The institutional and costly context of that frustration, in turn, is a China founded the Aviation Engine Corporation of China (AECC) in 2009 and spent over 40 billion dollars of its money on engine development within the next ten years, the same reporting notes. Facilities, test stands and manufacturing capacity can be purchased with a big spend, but no amount of money can instantly squeeze the iterative learning curve of high-performance turbofan development.
In the future case of Fujian air wing, it is rather simple. When the propulsion package of the J-35 constrains the recovery fuel, loiter-range or weapons-load capabilities, then the catapult capability of the carrier becomes a reduced number of operating choices compared with the capabilities indicated by the deck hardware. The J-35 can still be useful close in specifically in fleet protection and in point strike duties but the engine determines how far the relevance can be extrapolated before the mission becomes a stopwatch affair.
