General Dynamics F-16 Fighting Falcon Supersonic Multirole Fighter for upgrading your airforce on the cheap.
Mach 1.6 at 5000m
Holds speed well in turns and will pull high angles of attack without stalling.
Strong gear and lots of wing make landing easy so I didn’t bother with airbrakes.
Leave fuel out of the nosecones for balance.
AG 1 toggles burner. Animal with it, sluggish without.
Built in KSP 1.4