Dimensions
From EM Drive
The current best-estimate for the dimensions of various test articles is here. Exact dimensions are not known in most cases.
Credit to Dr. Rodal for compiling these.
| Description | Cavity Length (m) | bigDiameter (m) | smallDiameter (m) | rfFrequency (1/s) | Power (W) | Q | Force (mN) | Force / PowerInput (mN/kW) | Photon Rocket Force / PowerInput (mN/kW) | Multiple of Photon Rocket |
|---|---|---|---|---|---|---|---|---|---|---|
| Cannae Superconducting | 0.03 | 0.220 | 0.200 | 1.047*10^9 | 10.5 | 1.1*10^7 | 8-10 | 7.61.9 - 952.4 | 0.003336 | 228400 - 285500 |
| Shawyer Experimental | 0.156 | 0.16 | 0.1025 | 2.45*10^9 | 850 | 5900 | 16 | 18.82 | 0.003337 | 5640 |
| Shawyer Demo | 0.345 | 0.28 | 0.09613 | 2.45*10^9 | 421-1200 | 45000 | 102.30 | 80-243 | 0.003337 | 23980 - 72830 |
| Brady a TM Mode | 0.2286 | 0.2794 | 0.15875 | 1.9326*10^9 | 16.9 | 7320 | 0.0912 | 5.396 | 0.003337 | 1617.2 |
| Brady b TM Mode | 0.2286 | 0.2794 | 0.15875 | 1.9367*10^9 | 16.7 | 18100 | 0.0501 | 3.000 | 0.003337 | 899.12 |
| Brady c TM Mode | 0.2286 | 0.2794 | 0.15875 | 1.8804*10^9 | 2.6 | 22000 | 0.05541 | 21.31 | 0.003337 | 6386.7 |
| Fearn, Zachar, Woodward & Wanser | 0.2286 | 0.2794 | 0.15875 | 39300 | 170 | 22000 | 0.002 | 0.01176 | 0.003337 | 3.526 |
