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In foreground is model mock-up with all RC-system components in place. In back is RC transmitter with antenna mast almost fully collapsed into case.
IN THE PREVIOUS installments—the second and third, in the April and May issues—I discussed the basic Radio Control (RC) system, the selection process, and basic installation in a model aircraft. This month I'll get into the operation of an RC system. More detailed information using a basic training model will be provided in following months, including the assembly and flying aspects.
For the purpose of this presentation, let's assume we have that RC model-aircraft mock-up (containing the RC airborne components) from the previous article sitting in front of us on our workbench. The RC transmitter is nearby. To get familiar with your new RC system you are encouraged to operate it at home, try the various controls, and even pretend you are flying the model! Allow yourself to get the feel of it.
Hitec Laser 6 is typical four-channel-function-control RC transmitter. Antenna mast is collapsed to short section, to which channel-number flag is attached. Shortening antenna greatly reduces transmitted power, making transmitter safer to operate for tests in shop and permitting convenient range check outdoors. If you can get receiver to operate to roughly 50-100 feet from transmitter while antenna is retracted, you will have out-of-sight range once model is in air and antenna is fully extended.
Before turning on that transmitter, think for a moment about your location. If you are operating from your home shop or garage, the important thing to consider is whether there might be an RC flying field in the immediate area. You would be wise to check this out before turning on your transmitter for the first time. Keep in mind that two identical RC channels can easily interfere with one another.
Failure to turn on receiver power for your model only after you have turned on transmitter power could lead to jammed control rods and broken servo gears.
As a precaution, you can operate your RC transmitter for relatively short periods with the antenna fully collapsed. By doing this you are able to operate your RC system for checkout purposes, but the transmitted signal will be greatly reduced. Extended use of the transmitter with the antenna collapsed might cause overheating and damage to the output stages.
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