Li Yuhai, an executive vice president with the Aviation Industries Corporation of China (AVIC), told IHS Jane's at the Paris Airshow that a new Chinese turbofan for the J-17 has been "under testing," has completed "lab tests", and that "flight testing is in progress". He also said that the new engine would have a thrust slightly greater than the 8.7-ton thrust of the JF-17's current Klimov RD-93 turbofan.
At a joint Sino-Pakistani press conference on 15 June, Li also said progress was being made on the twin-seat version of the JF 17.
Pakistani sources at Paris confirmed that a JF-17 has been flying with the new Chinese turbofan, which could be revealed publicly "very soon". There is a suggestion the engine could be named 'WS-17' to complement the JF-17b, but officials did not provide any further performance indicators.
One Chinese medium-thrust turbofan programme long reported as slated for the FC-1/JF-17 has been called the WS-13. It has been developed with help from Russia's Klimov and is reportedly based on its RD-33 turbofan.
While previous reports mentioned development difficulties with the WS-13, the willingness of Chinese officials to talk publicly about this engine suggests a higher level of confidence in its prospects.
At the 2008 Airshow China in Zhuhai the Chengdu Gas Turbine Research Institute revealed it was developing a 9.5 ton-thrust turbofan and showed a possible model at the same show. It is not known if this is the engine that is now being test flown on a JF-17.