Bug,
The circular mass will rotate in the same direction as that of the rotor.
The following line should have been included when typing up the previous list;
- Two additional rods, which are located with a 90-degree azimuthal offset from the previously mentioned two, extend down from this 'strong swashplate' to the mast.
The unit is intended to act as follows;
- The hub springs are located between the teetering rotorhead and the mast. When the rotorhead teeters it imparts a 2/rev sinusoidal moment to the mast 90-degrees after the azimuth of maximum teetering rate. This contributes to the 'tipping' of the craft.
- When the rotorhead teeters it also imparts a 2/rev sinusoidal moment to the the rotating circular mass, and this imparts a 2/rev sinusoidal moment to the mast 90-degrees after the azimuth of maximum teetering rate. This, also contributes to the 'tipping' of the craft.
Assume that the rotational speed of the circular mass is 15 times faster than the rotational speed of the rotor. This means that the rotating mass will be applying its 'tipping moment at the 90-degree location when the rotor still has [90deg - (90deg/15)] = 84 degrees to rotate.
In other words there are 4/rev sinusoidal moments, at approximatly 90-degrees, applied to the mast when the pilot has his cyclic stick off center. This moment is in addition to the force at the top of the mass due to the pull of the tipped rotor disk.
If the above is confusing,
try here. This is the same concept but it is more confusing because the 'rotating mass' is the electric motor that powers the rotor.
Dave