I normally use flight controllers in quadcopters, but you can use them for airplanes too, there are a handful of benefits when using an fc in a fixed wing, like stabilization, osd in your fpv system, ...

The US Air Force (USAF) has successfully paired one its Lockheed Martin F-22 Raptor stealth fighters with an uncrewed jet in a demonstration flight. The unmanned platform was a General Atomics ...