Explorecraft wrote: "Null resulting force, to limits of measurement. Anything over a 10 milliNewtons should have shown, theset was suspended on a bearing-supported swivel at 15 cm from center, 1.12 Kg balanced by 1.2 kg mass on the opposing arm. Spark-gap set to 1.5cm."
"My configuration is 15kv (NT) 50 hz split rectification of one leg to alectrodes, other leg to electrode center (3 electrodes: 1+, 1 ac, 1-) The 3 electrodes are 15x20cm aluminium foil glued to 20x25x0.5 ceramic floor tiles of unknown (consumer-grade) quality. Plates are epoxied together to crcumvent flexure. Leads are clip leads arranged loosely to supports in order to observe and eliminate leain artifacts." Going by the standard equation for Plate or Microwave Dielectric Heating: "The power developed in the work by a microwave (or spaced-plate dielectric heating) electromagnetic field is governed by the basic power equation: Pv = 1.41 E^2 f Er tan d X 10-12 watts/in3 Where Pv = power dissipated in the work per unit volume in watts E = electric field strength in the work in volts per inch f = frequency in cycles per second Er = relative dielectric constant of the work tan d= loss tangent of the work" Your power input at 50 Hz using 7.5 Kv Rms is about 6.0 milliwatts per cubic inch. Not enough "tickle" to expect anything of interest. OTOH, at 2.45 GigaHz it would jump up to about 50 Kilowatts per cubic inch, and melt the tile. I recall that Los Alamos was melting ceramics this way sometime back. A rough cut at the displacement current (Id) (required to get things going) based on an Er (guess) of 6.0: I = C dV/dt C = 6* 8.85e-12* 0.15 * 0.20/0.5 = 3.2e-12 farads. a dump time of 1.0 microsecond. Then figuring the Id is about 0.25 amperes, and the energy per pulse is 0.5 *CV^2 = 89 microjoule per pulse, or at 50 pulses/sec = 4.5 joules/sec or 4.5 milliwatts. Not enough mgh energy to tip the balance?? Regards, Frederick
