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This experiment attempted to show that it wasn't the shape of the cavity that mattered, but the asymmetrical energy density of the resonating waveform within the cavity. Shawyer's cavity resonates in the TE0,1 mode and the energy is concentrated in the narrow end. This cavity was an attempt to create an asymmetrical energy density in the cavity, but failed because of a bad mismatch between the launcher and the cavity. The result was arcing and severe heating.


Curvity proposes that there are two different types of propulsion both using a modification of gravity. The first is "negative gravity" which can be created by an extremely large difference and is currently impractical for controlling gravity.

The second is a modification of the local gravity field and is based around a high power resonanting electromagnetic field to one side of a cavity. This cavity was designed with that control method in mind.


Copper was used because it is relatively cheap and has high conductivity compared to other metals. The cavity was designed to mate with the launcher from a commercial microwave.

When making the cavity, triangle shaped pieces, as shown above, were brazed on before the cavity was rolled into a circular shape, in order to close the gap at the back. The cavity was then rolled up using a can to form the circular shape and pipe straps used to close the gap.

After rolling up the cavity, the top seam was sanded down to get it as close together as possible. The best method for brazing the seam was from the inside using slightly bent pieces strapped to the outside to catch the solder. The solder was applied from the inside, ran through and pooled on the external strips of copper plugging the hole. It also left a fairly clean seam on the inside.

Coolant system including laser bouncing off can

The cooling system consisted of a can filled with horse laxative [2] into which the magnetron was dunked. The oil was then pumped out of the can, through a radiator and back into the can. Oil was used because it electrically isolates the magnetron, removed heat quickly and removed the fan which would have upset the measurements.

Complete cavity hanging and labelled

F-zero was then hung using aircraft wire attached to the rafters of the garage. A laser was bounced off the can onto a white board in the background in such a manner that even the smallest movement of the test rig would result in an amplified movement of the laser dot (the dot is barely visible in the picture). The plan was to draw scaled marks on the microwave's lid to measure any change in position.


The oil circulating in the pump imparted a slight wobble which took forever to damp out. The cavity was only tested about four times and at most for 20 seconds.

The problem was two fold, the first was arcing between the cavity and the launcher, which were only bolted together. The result were very minute spaces between the launcher and the cavity which resulted in sparking. The sparking for the most part was fixed, but another problem, because of reflection was arcing inside the launcher between the magnetron's probe and the launcher wall.

Because of arcing, testing terminated early.


No motion was noted, although because of arcing and sparking, energy built up inside the cavity was likely zero.


After talking over the results with a professor, it was determined that the match between the launcher and the copper tube was causing little to no microwaves to enter the cavity. The experiment was abandoned and chalked up to experience.

  1. The magnetron is wrapped in tissue paper because it had been dunked in oil.
  2. mineral oil, hehe