TD......"You will note that if the stage 2 HPT disc (similar position to the IPT disc) became liberated for one reason or another, if it would move back, the turbine blades would clash with the stage 1 LPT nozzle slowing the disc speed. It is an important design feature to inhibit runaway disc speed."
Come again? I just said that, re: TRENT 900? How does HPT climb through the IPT to get at LPTNozzle? Blade clash is a bad thing for the 9, but ok for the 7?
Last edited by Lyman; 11th May 2012 at 19:08.