Reading the NASA paper published last month, one of the main issues in verifying thrust effects is that thermal effects still have a significant effect on frustrum movement, even if its just through shifts in the COG, which are in the same order of magnitude (although following different dynamics) than the actual thrust force.



A suggested improvement is to modify the arrangement to minimize COG changes caused by thermal expansion/shrinkage.



Wouldn't it make sense to instead make sure to enter a "thermal steady state"? As such I would propose to run a EM-drive prototype continuously powered during an experiment, and start measurements only once power components have reached steady state operating temperatures, where heat production and heat dissipation from heat sinks and cavity itself are at equalibrium



Modifying the thrust vector would then not be done by turning the main HF power source on/off, but by altering more subtle parameters, such as resonance frequency tuning. (AKA deliberately detune the system to eliminate the thrust force)



All HF components would continuously operate at the select power output throughout the duration of the experiment. As such the force, and how it changes based on small differences in the cavity resonance and phase shift properties could be studied without any significant thermal expansion or shrinkage affecting measurement results. The entire system could be calibrated for this thermal steady state to achieve higher resolution.



Of course for that, the HF components would have to be rated to operate continuously for several hours or longer.



(This might have been discussed before. I haven't had the chance to read through all 150 pages of this as well as all 7 previous threads. If so, feel free to moderate this post.)

