Originally Posted by
bvcu
except for the unreheated Adour in the Hawk , very reliable !
As a single engine aircraft, it had to be.
Regarding the RB199 hot end, you have to remember the materials technology that was available at the time. And the operation which meant that the engines were often running at high power for most of the time.
Both the HP Turbine and IP Turbines were retrofitted with more modern single crystal blades and this increased the HPT Blade life from typically 200 hours to 1000 hours, which even today is pretty good.