Originally Posted by
JimEli
I would think 26K is outside the optimized hover region for the Apache. Quirky things happen there. L/D should be more linear in the central region where hover occurs for most helos.
As I don't have access to an Apache's RFM, I used a S-92A one, in order to try to understand what you are affirming, choosing torques and weights as round as possible. I've tried HOGE and things got worse.
On a thread about LTE a long time ago, the discussion about the relation between loss of NR (due overpitching) and torque increase (added to the loss of NR on the TR) emerged and someone, I think Nick Lappos, explained
why it occurs.
So, you applied a linear relation between torque and thrust on your calculations and my question was why it is linear.
Reviewing you post and trying to understand, another question arised: if the helicopter is on ground, the amount of thrust generated by the MR shouldn't be related just to the power/pitch/torque (collective position...) applied instead of torque and takeoff weight? If the helicopter isn't in the air and the torque setting is well below the required for hover, why the weight on wheels should matter to determine the thrust being produced?