thanx for replies
this is what i thought:
for certain weight, temperature, density,..., colective is ALL the way down, and CONSTANT attitude is held (constant airspeed), no cyclic movement to play with RPM's.
- airspeed 0 (vertical autorotation), RPM's = X
- airspeed around say 30 Kts, RPM's = Y
- airspeed around the value for best endurance, RPM's = Z
- airspeed around the value for best glide ratio, RPM's = ...
- airspeed rising towards max speed, RPM's = ...
Now, what's the conection between RPM's and constant values of airspeed. and, is it possible to maintain RPM's through the whole range of usable airspeed?