my cone cluch story got a twist. I assumed any problems to do with engagement is to do with cone clutch
. All that noise
made me not do proper research
Now, as I am looking at issue in more detail and doing testing, realised that issue in my case is not (only) cone clutch
What is happening is that folding propeller
sometimes does not fully open! Blades are at around 45 degrees and there is almost no push forward. Propeller
rotates, for sure even very fast but not fully open.
I have checked and propeller folds/unfolds smoothly by hand.
Sequence - 2000 RPM
as blip to unfold propeller fully, then back to 1200 works fine. Adding RPM
fast at this point makes prop not expand fully and I assumed is cone clutch. Maybe adding RPM's slowly will get better results.
L400 is good in this respect as one can easy observe propeller in action.
So, back to drawing board.