Some aerodynamic fixes are often perplexing...
Student (to QFI with shiny new A2): "Sir, why does the F-14 have two fins?".
QFI (quick as a flash after recalling all that hard A2 preparation work): "To improve directional stability at high Mach No." - followed by nicely drawn multi-colour diagram of fin AoA and dC
L/dα curve.
Student: "Ah, thank you sir, I understand now, sir. But sir, why does a Shackleton have two fins?"
