OK B2040-3350Kv
| Prop | Volts | Amps | Watts | rpm | Thrust | Efflux | Efficiency |
| - | 7.0 | 0.56 | 3.9 | 22463 | - | - | - |
| GWS EP4025 | 7.0 | 5.5 | 39 | 20516 | 185g | 41mph | 82% |
| GWS EP4530 | 7.0 | 9.0 | 63 | 19103 | 267g | 44mph | 80% |
| GWS EP4540 | 7.0 | 10.2 | 71 | 18639 | 299g | 53mph | 79% |
| APCE 4.7x4.25 | 7.0 | 13.7 | 96 | 17221 | 264g | 45mph | 74% |
| GWS EP5043 | 7.0 | 14.3 | 100 | 16891 | 375g | 55mph | 74% |
| APCE 5x5 | 7.0 | 16.8 | 118 | 15913 | 277g | 50mph | 70% |
| - | 10.5 | 0.76 | 8.0 | 33817 | - | - | - |
| GWS EP4025 | 10.5 | 11.2 | 118 | 29710 | - | - | 81% |
| GWS EDF55 (A10) | 10.5 | 11.3 | 119 | 29585 | 301g | 95mph | 81% |
| GWS EDF64 (bare) | 10.5 | 12.2 | 128 | 28968 | 387g | 91mph | 81% |
| GWS EDF64 (ME262) | 10.5 | 13.1 | 138 | 28540 | 360g | 88mph | 80% |
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