PBL
Please do check your math. Two circumferences are 2(3.14)D= ~ 90 meters, call it 300 feet/second. This is airspeed additive, so the resultant tip velocity is handsome, but not 0/M/0/second. The Talon is a trainer, and barely transonic, so Mach number needs to be >as.
edit: the wingspan of the Talon is 25 feet total. the circumference then is 85 feet for a doubling to 170fps. Still remarkable, but not unbelievable.
bear