Source: China – South China Morning PostChinese aviation engineers say they have worked out some critical performance constraints of a stealth combat drone still under development in the United States.Their estimates are based on some photos, openly available information and reverse-engineering software. They found that the XQ-58A Valkyrie, an unmanned combat aerial vehicle, was not good at aerial combat.When making a U-turn, for instance, it can withstand a pull of only about 1.7 times that of gravity, according to their…Read More