Shawyer Reproduction Test Results & Eliminating Causes

Below are tests I will do in order to eliminate the other variables

  • Heated air escaping the cavity in a jet
    • Measure the temperature of the cavity – Systematically measure the temperature on all sides of the cavity after each test.
      • I haven’t done this systematically yet, but for the test runs this week, the cavity barely gets above ambient as measured by the IR sensor and by touch.
    • Fill the cavity with water and if it doesn’t leak, no air holes – Take the cavity to the sink, take out the probe and fill it with water to see if it leaks.  Leave it overnight and video tape the result in the morning.
      • I have already partially done this test before because when cleaning out the extra flux from the inside and I know the bottom half holds water with no leaks.  I am not sure about the larger flat plate I brazed onto the large end yet, but that should be easy to test and we have a sink in the lab.
  • Ion Wind
    • Make sure the voltage measured on the outside of the cavity is zero – Video tape the following – first, show the voltmeter makes a sound when it measures a contact between it’s two leads.  Next show that the Faraday cage is grounded to the grounding pin of an wall socket.  Then show, by beeping the voltmeter, that the cavity is grounded to the Faraday cage.  With the cavity grounded there is no way a voltage difference could build up across the cavity, especially not the thousands of volts DC necessary to create an Ion wind.
  • Buoyancy
    • Even if the cavity was heating, there is not enough volume to lift the cavity.  Weighing the cavity on a scale while powered will also confirm buoyancy is not the cause because the buoyancy should pull the cavity up with the larger end on top.
  • Magnetic or Static field attraction/repulsion
    • The tests are done in a Faraday with the cavity at the end of pendulum.  The cavity, to be confirmed in the Ion Wind tests, is also grounded.  The closest magnets are in the electrical motor of the fan and the magnetron, some six feet away.
  • Vacuum Test
    • I have started looking for suppliers for the pump, acrylic lid, and PVC pipe to build this:
    • It looks like I can get the pump for about $450CND shipped (a nice 5CFM model), the 2″ thick, 24″ by 24″ cell cast acrylic lid from here ($250) and in an oil and gas province, finding a short piece of large diameter PVC pipe ($70) should be easy.  I also need a 1/8″ neoprene sheet for the seal between the acrylic lid and the pipe.  The 1/2″ aluminum plate at the bottom I can get from the Metal Supermarket and then I will have to water jet cut (or laser cut) the aluminum, acrylic plate and neoprene.  I still have to figure out how to get the cavity inside to test with power…

Any more tests I should do?  Comments?