General coaxial question: How is the lower rotor pitch set, relative to upper rotor pitch?
On the Kamovs that are used for logging in BC, the pilot goes into hover on the first flight of the day.
He then adjusts a control that changes the collective difference between the two rotors and thereby
removes any tendency of the craft to yaw.
insurmountable aerodynamic limitations?
A logical progression to Generation II:
1. Single main rotor and tail rotor.
2. Rigid rotor with 3+ blades, for greater controllability.
3. Twin laterally displaced main rotors; for flight symmetry.
4. Advancing Blade Concept w/ pusher propeller; for increased forward speed.
5. Large Chord and Low Tip Speed; for increased forward speed.
6. 'Absolutely' Rigid Rotors; for reduced cross-coupling.
7. Active Blade Twist; for greater L/D ratio, increased forward speed and reduced vibration.
8. Reverse Velocity Utilization; for greater L/D ratio and increased forward speed.
9. High Frequency Leading + Trail Edge Flaps; for reduced vibration.