List of Suggested Experiments

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This page compiles suggestions for as-yet untested variations in experiment designs for EmDrive testing. When possible, links to the original suggestion and a brief description of the justification for this test are provided.

Note: For purposes of this list, the baseline for experimentation is considered to be a copper fustrum with either a magnetron or coaxial RF feed operated at approximately 2.45Ghz, similar to Shawyer's Feasability Study

Design/Shape Modifications

  1. Replace solid endplates with a circular grid design similar to the endplates used by Cullen in his 1950's waveguide experiments, or a mesh as the one used for the glass windows in home-microwave-ovens, having a spacing between mesh or grids small enough such that only wavelengths smaller than that can get through. Purpose: to allow convection through the fustrum, eliminate buoyancy, thermal jet effects, natural thermal convection currents, and other gas effects.
  2. Place ferrite beads in the fustrum, either one large one next to an endplate or a pattern of them along a line in the longitudinal direction.[1]
  3. Build Large end plate out of Metglas or a similar material with high magnetic permeability like cast iron or any ferrite.[2]
  4. Place a ruby inside near one of the ends to emit at 2.4 GHz as used in solid state Masers.
  5. Fill the fustrum with ammonia gas to emit at a 24GHz[3]
  6. Place a dielectric next to the Small end, as done by NASA Eagleworks, who found extruded HDPE to be slightly better than extruded PTFE. Do not use molded (instead of extruded) polymers. NASA Eagleworks found that Neoprene rubber performed poorly as a dielectric in the EM Drive, as it resulted in considerably less thrust.
  7. Separate resonance and attenuation chambers (proposed by WarpTech)

Experimental Measurement Setups

References

  1. Forum post by Rodal summarizing several prior posts. Purpose: to increase attenuation gradient in TE modes, having an axial magnetic field.
  2. Forum post by Flyby referencing earlier posts. Purpose: to test implications of statements in Prof. Yang's paper regarding magnetic thrust forces being approx. 100x greater on the end plates than the side walls.
  3. Forum post by aero, in response to Rodal's explanation of the history of maser development. Purpose: To produce maser-like amplification inside the fustrum.