Thanks for the info, and that is what i though.
Now how do I measure the N2 free turbine speed? I thought that was directly related to rotor rpm, so read from the rotor tacho, and once you go to full throttle the free turbine or (power turbine is it?)and rotor speed matched/stayed constant together around 395 Rrpm, and only the NG changed its rpm due to power requirements’
ie: less power (collective setting, low torque) less NG rpm and
more power (raising the collective, more torque) more NG rpm, but the free turbine basically stayed the same I know it can move a little.
Please remember I’m trying to understand how to calculate the NF or NP or C2 cycles I think?
I understand the NG or C1 cycles I hope! as they are all measured from the NG gauge and have been explained earler in this thread (around pg6) but understanding the F2 Partial cycle has me beat at the moment.
Cheers.