Now that i finally found time and actually remembered this topic, i shall try to clarify what my spacecraft would be like.
We can see in the figure above that the driving force is created via changing the radius of rotation of the flywheels’ barycenters (centers of mass) in relation to the center of the rotating discs. The area hatched in red represents the intensities (not vectors)of the redundant centrifugal force created on the 3pi/2 - pi/2 segment, which forces the entire assembly to move. This is still just an idea, but I’m over 99% sure that this vehicle could ascend from the surface of the earth, and after leaving the intense gravitational field continue to effectively accelerate without any restrictions.
Theoretically, if faster-than-light speeds are possible, it should, without major problems, after some time (eg one year of flight) reach and exceed the speed of light, but this is still in question. The problem is that, according to the original idea, the driving energy would be electric current and if it did reach the speed of light it is likely that the entire system would shut down, because the craft would try to exceed the speed of electrical charge propagation.
However, even with that, this type of propulsion has several indisputable advantages: doesn’t need large amounts of fuel, there is practically no interaction between the assembly and the environment, doesn’t pollute, and - it could fly over or even land in someone’s flower garden without disturbing the dust on the plants.
Details still to be worked out: characteristics and performance of transmission, friction minimalization, types of material used, material strains and vertical control. Regarding the stress of the materials, according to my preliminary calculations, it wouldn’t be too excessive, it should be far less than the stress produced by Petrus’ rotary ring, and immeasurably more energy-efficient. Carbon fiber technology, of course, is always welcome, but it might be sufficient and far more cost-effective to use a steel alloy, like tempered martensite or silicon-manganese steel. For successful transfer of energy from the engine (electromotor) to the flywheels all the rotations must be strictly controlled, otherwise energy will dissipate and the driving force will be either very low or non-existent. The trick is that all moving parts must have the same angular velocity and
This principle of operation is technically flexible, and there are many variations in utilizing the excess spin. The figure below shows a more advanced and simpler form of the same basic propulsion principle.
To drive the “rotating mass” we could use electromagnets, like in ultra-fast trains.
All in all, this is pretty much how the final product would look like: