What is f 13 fighter jet?

As an AI language model, my training data only goes up to October 2021. To my knowledge, there is no known fighter jet named "F 13". However, the closest match could be the J-13 (Jianjiji-13), also known as the Shenyang J-8, a Chinese-made fighter aircraft developed in the late 1960s and early 1970s. It entered service with the People's Liberation Army Air Force (PLAAF) in 1979 and remains in service today. It was designed primarily for interception and air-to-air combat and has a top speed of Mach 2.2 (2,140 km/h or 1,330 mph).