Information Articles July 23, 2008
Even with the advent of spread spectrum technology, many RC aircraft pilots still use the 72 mhz frequency band. If you use a conventional PPM or PCM radio system, it’s very important that you be aware of the different frequencies and frequency control methods used by RC pilots. Failure to observe which frequencies are in use at any given time can result in the loss of one or more RC model airplanes due to radio interference.
Every FM RC model airplane operates on a fixed frequency. Groups of frequencies are divided into channels. Each specific frequency is given a channel number. This table lists the different frequencies found in the 72 Mhz band, and their respective channel numbers.
72MHz Channel / Frequency Table
| 11 / 72.010 | 28 / 72.350 | 45 / 72.690 | 12 / 72.030 | 29 / 72.370 | 46 / 72.710 |
| 13 / 72.050 | 30 / 72.390 | 47 / 72.730 | 14 / 72.070 | 31 / 72.410 | 48 / 72.750 |
| 15 / 72.090 | 32 / 72.430 | 49 / 72.770 | 16 / 72.110 | 33 / 72.450 | 50 / 72.790 |
| 17 / 72.130 | 34 / 72.470 | 51 / 72.810 | 19 / 72.170 | 36 / 72.510 | 53 / 72.850 |
| 20 / 72.190 | 37 / 72.530 | 54 / 72.870 | 21 / 72.210 | 38 / 72.550 | 55 / 72.890 |
| 22 / 72.230 | 39 / 72.570 | 56 / 72.910 | 23 / 72.250 | 40 / 72.590 | 57 / 72.930 |
| 24 / 72.270 | 41 / 72.610 | 58 / 72.950 | 25 / 72.290 | 42 / 72.630 | 59 / 72.970 |
| 26 / 72.310 | 43 / 72.650 | 60 / 72.990 | 27 / 72.330 | 44 / 72.670 |
If you fly at a club, there will normally be a frequency board posted with the information above. Before any pilot turns on their radio system, they are expected to place a clip or pin on the frequency that they will be using. This ensures that each radio is operating on a separate frequency, and prevents many interference caused crashes.
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