Originally Posted by
DaveReidUK
We're told that the GE9x has a higher tip speed than its predecessors, thanks to the redesigned blades and lower blade count.
Assuming a typical 2400 rpm at 100% N1, the tips of a 134" fan will be travelling at around 430 m/s (apologies for the mixed units).
So 961 mph or 1.24 Mach. That be fast!