In fact, there is an alternative way to detect dipole gravity effect. It is to use the rotating hemispherical rotor itself as a moving projectile. It is not a method of detecting the force directly from the rotor using a probe as a detector. It is rather a method of detecting the force the rotor experiences itself by its interaction with the universe.
This method has several inherent advantages over the other by the fact that even if the force is very small, the long time accumulation of the force can manifest itself in a significant spatial displacement of the rotor.
The size of the rotor doesn't have to be very large. Because of the force law, the displacement will be the same regardless of the size of the rotor, although the force does depend on the rotating speed.
Rotational speed doesn't have to be extremely large, because the effect can manifest accumulatively for a long period of time.
The negative effect from the friction would be insignificant, because of the slowness of the motion at the start and in the following motion.
The key point of this experiment is to mount the rotor on one side of a long balanced arm resting on a pivot, positioned horizontally, in such a way that the axis of rotation is aligned to the tangential direction of the circle of its path and let the force of the nature to turn the arm. In other words, let the hemispherical rotor to work like a horse turning a wheat grinding mill.
It may take weeks or months to notice any displacement of the rotor depending on the force it experiences with the nature. The amount of displacement depends on the square of the time measured in seconds
S=(1/2) a t^2.
Assuming the force on the rotor per unit mass would be in the range of 10^-14 m/sec^2, which is extremely small, the rotor at the end of the arm will still move 5 meters in circle in one year.
Possible errors that may be experienced and need to be dealt with in this experiment will be the rotation of the rotor due to the minute initial imbalance. In most of the cases, however, the motion due to the imbalance will be finite, up to the final lasting balanced position. The second source of the error may be in the vibration. If the rotor vibrates excessively, there is no meaning of measuring such a precision motion, the rotation could simply be attributed to be caused by the vibration.
In conclusion, though, this is not a very difficult experiment and the risk involved in the experiment is very small. The result may come out in the first few weeks if not a few months because it is easy to measure the minute displacement of an object in space using the various methods utilizing interferometer.
The actual force may be calculated by assuming the model universe in which the total mass M is located at the distance r in a form of a thin shell as in the case of Lens-Thirring or by using the simple two mass pole model universe in which the two poles of mass M/2 each are located at the distance r from the center in the opposite directions.
In effect, this experiment measures the total mass and the average distance they are located from us in different kinds of models of the universe.