24 FPS was made for movies because at a higher rate the reels would be so big that they wouldn't fit the projection equipment. 24 was the lowest they could go to get acceptable quality.
The thing is a video game isn't a movie. When you throw "head panning" into the mix it changes everything because of the added (or subtracted) degrees of motion. Perception of motion is also impacted in flight sims directly by the degrees of turn rate of the aircraft. The higher the turn rate , the higher the FPS is required to keep the illusion.
There was a really old study about this but they only used a fixed forward view. They don't take into account movement of the viewpoint at all. It's too much maths for my tiny brain to handle but that's the gist of it. One could infer that if you were turning right and also panning right that it would take an even higher FPS to continue to look smooth.