Graviman,
What were your thoughts regarding proposed method of linking prop thrust with prop RPM?
I am having difficulty understanding the paragraph in your earlier posting. Does your use of the word 'speed' mean 'rotational speed'?
If so, are you proposing that rotational aerodynamic drag of the propeller (enhanced profile drag due to extremely high blade pitch) be used as an alternative to the worm & gear, for controlling the rpm of the propeller?
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Edited to add the following.
I have redone the calculations for power loss using the rotational speed of the wheel instead of that of the worm. This appears to be more logical. The maximum power lost to friction is now 0.83% of total power instead of the previous 13%. If correct, this is very acceptable.
I believe that the worm & gear is absorbing very little power (friction). It is redirecting the power to the rotor, as desired.
Dave