China flew an improved version of its Shenyang J-31 Gyrfalcon stealth fighter. Compared to the previous prototype, the new version features a host of refinements and has started to resemble a genuine fifth-generation stealth aircraft in many ways. The J-31 is intended for military export markets. It is expected to be priced around $70 million. This is half of the F-35 stealth fighter price. The fourth-generation Eurofighter Typhoon and Dassault Rafale fighter jets are priced at about $100 million. J-31 The J-31 is believed to be powered by a pair of Russian-made Klimov RD-93 afterburning turbofans each developing roughly 18,000lb of thrust at maximum power. The Chinese hope to replace those engines with a pair of indigenous WS-13E turbofans, which are expected to develop roughly 22,000lbs of thrust. China began development of the Taishan in 2000 to replace the Klimov RD-93 turbofan, which had been selected in the 1990s to power the JF-17 light-weight fighter. It is de...