Radio Control Aircraft Clubs
Basic Understanding Of 2.4GHZ Radio Control
There are numerous ways in how 2.4ghz radio systems work to the more traditional 27mhz and 40mhz. To help give you a basic understanding of what 2.4ghz radio systems do and how they are a better choice I will describe to you the differences. With traditional transmitters you have crystals e.g on a 27MHZ radio system two people could operate on frequencies 27.195 and 27.095 there’s also other frequencies 27.145, 26.995 same with 40MHZ radio systems. Its important to have a different crystal to someone else operating in the same area.
Clubs have systems in place called peg-boards and different coloured ribbons on the end of their transmitters to notify others of the frequency band there on. If your out and about in the park its hard to know frequencies other model users are on unless you ask them. If someone has the same frequency as you it interferes with your model ultimately resulting in loss of control. Aircraft model flyers call it “shot down” and for land based models its called “a run away”. To stop this some of you may of heard of a failsafe. Failsafe’s position the models servo’s in a set position (one you set up) for land based models typically full brake.
Its not just other frequencies on the same band that can interfere through personal experience I have found it to be over head phone lines, over head electricity lines, mobile phone signals and telegraph poles. 2.4GHZ radio systems scan for an available signal before they are able operate, if there’s no free available signal you won’t be able to use your model. There are 80 channels to choose from and 40 channels on some Spektrum radios, so lets just go with 40. 2.4GHZ radio systems also come with a built in failsafe so theres no need for an additional failsafe as with traditional radio systems.
IMPORTANT do not use a failsafe with a 2.4ghz radio system because they counteract with each other reversing the result (with a car normally resulting in full brake will result in full throttle).
If your operating your model on 2.4GHZ and someone comes along with another 2.4GHZ system running on the same auto-selected signal. One of the two models will automatically re-adjust itself to a new available signal. With 40 to choose from there’s a whole load of options to choose from and if you do find yourself with more than 40 models around get in touch with us because you may well be breaking a world record!
Just to finish of the signal time between the transmitter sending the signal and the receiver giving the servo the instruction is also considered quicker than traditional radio systems. The chances of you loosing control of your model are next to none.
About the Author
This article was brought to you by Richard Metcalfe owner and founder of X Nitro RC Models
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