I've always wondered whether the turbine at idle contributes any significant power to uping rrpm
If the needles are joined, there
will be power being transmitted. It's how I nearly got caught doing a real one early on. As a result, nowadays I never allow anyone to continue on looking at their intended landing spot in an auto descent if they are doing a power recovery and have joined the needles, as the projected landing spot will be further out than for when there is silence.
real engine off landings are no where near the same as the ones done during practice
Part of the old standard patter that pertains to RRPM, as follows;
collective full down , check,
safe to reach an area, check,
throttle in idle cut off, check, (as with sleight of hand the mags go off),
quiet eh?
Did you just notice, no hydraulics? dumbo.
well, be positive, but don't over control, damm it.
now listen carefully to the sound of the blades,
let's slow them down, hear that?
Now let's speed them up, see that corolois effect, only used five knots to rescue it, magic eh?
now you do it, easy eh?
did you just notice that your RRPM tacho is U/S, dumbo,
then r-e-m-e- m-b-e-r this sound, or you die.
ah, just reminded me of a joke.
tet