by DAVID AXE

In 1989, the Chinese Chengdu Aerospace Corporation unveiled a major upgrade for its locally-made F-7 jet fighter, a licensed copy of the classic Soviet MiG-21. The new F-7 variant moved the engine air intake from the nose tip to the sides of the fuselage, making room in the nose for a more powerful radar.

Twenty-one years later, this upgrade—now named JF-17 Thunder—is flying combat missions with the Pakistani air force, so far its sole user. Further enhanced with a new wing, a cutting-edge intake design and a new, more powerful engine, the JF-17 is Pakistan’s most important front-line fighter—and a remarkable extension of a basic plane design dating back to the 1950s.

In essence, the JF-17 is the ultimate MiG-21. In a sector increasingly dominated by American-made stealth fighters, European “canard” planes and variants of the Russian Su-27, the JF-17 is an outlier—a highly evolutionary plane that doesn’t try to be revolutionary.

After all, revolutionary is expensive.