All quite interesting but the important bit is in the conclusion: "In addition to mechanical and related considerations, the authors’ methods of analysis of sen

All quite interesting but the important bit is in the conclusion: "In addition to mechanical and related considerations, the authors’ methods of analysis of sensor data to derive thrusts rests on untenable grounds... Therefore, until more control tests are performed allowing a more accurate method for estimation of thrusts, no faith can be placed in the thrust magnitudes reported in the paper."