Thanks VP, but I’m still looking for the answer for the free turbine cycles?
They state
(b) Free turbine
C2 = F1 + ∑F2
F1: Complete cycle to the value of 1
F2: Partial cycle (power decrease followed up by a return to nominal rating), related to all the values reached less than or equal to 85%
When N2 decreases and reaches a value between 85% and 70% then rises above 98%
They use the name N2 but the values they state sound like N1 values not Rotor gauge!
This is surely not the Rotor gauge they are referring to?? Or is it!!
Also F1: Complete cycle to the value of 1 Does that mean that F1 can be less than 1 for a start??
Thanks again.
