Originally Posted by
IFMU
So - you are using a linear relationship between power and speed? Care to explain?
You're right. Assuming linear was probably being generous on a fuselage+rotor like SB1.
Even the hotrod low drag/FE X2TD fuselage power required slopes up with airspeed on the upper end of the envelope
Originally Posted by
IFMU
IIRC you said you were a key player on the X2, which means you know the effect weight has on speed for an X2 rotor.
Edit: my bad, you said you did a bit on X2. So maybe you don't know.
Most definitely not a key player on X2. However I do have a copy of AGARDograph 197 on my desk at the moment.