Tests on Superconductor Gravitational Effects by Alexander V. Frolov 1. Theoretical background. The high density fluctuations in Bose condensate is laboratory scale case to confirm theoretical conclusions about gravitational field cut-off frequency . This experimental work was organized to examine if some resonance effects in 10-100 MHz range can be detected as mass (weight) anomalies. 2. Previous experimental data Basically experimental approach in this area of research was described in  by Podkletnov:
1. Superconductor material was YBa2Cu2O7- x disk of 145 mm diameter and 6 mm high.
2. The effect is detected as 0.05% – 0.07% mass (weight) changes. It was detected for the case of non-rotating high temperature conductivity superconductor (HTCS) disk, which is leviting in 50-106Hz EM field.
3. Rotation of the disk increase the effect. Important fact is that during change of rotation velocity of the HTCS disk the effect was about 2-4% that is maximum data.
4. In the case of constant rotation velocity (about 5,000 rpm) the effect was detected about 0.3% – 0.5% change of the weight.
5. The effect was detected also for the case of rotation of the HTCS disk after EM field of solenoids was off. Other experiment of 1995 was described by Podkletnov . Two-phase material of the disk: in the operational mode the upper layer of the disk is superconductive the layer below is not superconductive. So, in this case the area of the phase transition between two layers was created especially. One more important step in understanding of the effect was made by G. Modanese , who assumed that mechanical rotation of the HTCS disk produce motion of Bose condensate like electric current in HTCS material. Next experiment by Podkletnov and Modanese was described as “impulse gravity generator” . They used 50,000 A and 1MV electric discharge onto HTCS target to create non-dissipative “force beam” or gravity wave. This experiment is new step in understanding of process since.
Podkletnov’s idea of “shielding of gravity” is changed to conception of force action against gravity. This action is possible as result of artificial gravitational wave or impulse. Static tests mainly were not effective but important example is experiment by John Schnurer . The effect was detected in the case on non-rotating HTCS disk, which was leviting above permanent magnet. The effect was detected only during change of HTCS material phase from superconductor to non-superconductor phase (heating above Tk).
This phase transition usually takes several seconds ( 2-3 seconds) when the effect can be detected. Experiment with rotating HTCS ring described in  is example of gravimagnetic field produced by spinning superconductor. The results were presented at a one-day conference at ESA’s European Space and Technology Research Centre (ESTEC), in the Netherlands , 21 March 2006.
This experiment is the gravitational analogue of Faraday’s electromagnetic induction experiment in 1831, continued in the PDF file