Most of the radio system used for our leisure now operate on the 2.4GHz band. This frequency band provides many advantages over other bands like the 26, the 35, the 41 or 72Mhz.The main ones include the possibility of a large number of simultaneous users without having to manage the frequency and telemetry that now allows to know what is happening in the model in real time through sensors.
Frequencies applicable to all types of models:
2400 MHz to 2483.5 MHz upper limit permitted by the standard power of 100 mW on the upper part of the band (2454 to 2483.5 MHz for use outside buildings) limitation that does not exist in indoor flying.
Reserved for model airplanes
The different types of remote controls
The Basics: These are generally sets of 2 to 4 lanes (functions), without the possibility of settings other than changing the direction of rotation of the servos.
The Programmable: Term grouping all sets of radio controls feature a soft (program) allowing multiple settings such as servo travels, neutral, inversions, mixers etc … These Radios can enslave up to 18 channels for more complete. Latest also allow update their software via a PC.
The programming of radio controls
Here, no secret, the best way to know the possibilities of its remote control is obviously to read the manual. When one is familiar with a programmable remote control, it can refine its settings very quickly and give the character that we like to its model and adapt its behavior to its steering capacity or the needs of the flight. An early model will not adopt the same settings that aerobatic model for example.
Small glossary of the main baths used in the instructions and menus of the transmitters:
Binding: Procedure pairing between a transmitter and a receiver 2.4GHz.
Memories: All transmitters so slightly advanced feature a number of “memory” for storing all settings of different models. Some even allow storage on SD card making the number of almost infinite memories.
Control mode: Many issuers used to select the driving mode that suits you best. Gas left, gas right, left aileron, right aileron etc … 4 control modes are available. See the picture below, which will tell you more than words. This choice directly affects the use of different mixes of radio
The type of models: Most modern transmitters are divided into several sub-programs. Each manufacturer to form, but the principle is always the same: After the flight mode, you must tell the sender what kind of model we want to change: aircraft, glider, helicopter … After this initial information, it is also often specify the type of wing model: number of servos for the ailerons to the flaps. The tail type model: normal, butterfly (V), one or two servos for deep, model Delta, flying wing … Depending on what you report here, the issuer may not offer you the same menus mixes for example.
Reverses: This function allows you to reverse the direction of rotation of a servo. For example, if your drift (or your wheels for a car) shines to the left when you turn the handle to the right, it is in this menu you can restore the operating direction.
Trim: Small controllers usually located either side of the control stick to adjust flying (or driving) the neutral of an order to perfect the trajectory of the model.
Sub-Trim or Neutral: Same as above but only accessible from the remote control menu. Use sparingly, prefer a mechanical adjustment at the linkage if big gap to make up.
Travel Adj or adjustment of limits: In this menu you’ll be able to adjust the servo travels and therefore various control associated with it. If your model is too bright at the ailerons for example, reduce the travel of the latter will make it more docile.
Dif or Differential: This menu is primarily used for gliders. The differential reduces the downward stroke of the ailerons and avoid or reduce the “adverse yaw”. We sometimes need this function for shutters and a butterfly tail (V).
Dual Rate or double movement: In practice, a two-position switch toggles in flight between two clearance values. Practice on a model of acrobatics or deflections to spend all the figures are too large to easily manage landing for example.
Exponential or Expo: This often associated with dual rate function to limit travel around neutral while gradually overtaking the race approaching the stop, which is achieved with maximum deflection.
Mixes: Menus for mixing different functions (or orders) of the radio control. On a flying wing, for example, the same components are used to both control and depth control ailerons.For this mixed function, we will use a mix. Similarly for a V-tail in which the flaps serve both depth control and drift control. The proportion of mixing is adjustable and expressed in%. It is also possible mostly affect a switch to the mixes in order to deactivate them at all times. (convenient for experiments)
Key pre-programmed mixes:
Flaperons: Allows you to use the ailerons as flaps.
Fins-Shutter: Allows you to operate the same time the fins shutters (very used on gliders when we want to do aerobatics).
Shutters-Aileron: It’s the opposite. Can actuate fins along the shutters. Glider for example, it allows to benefit from the increased lift due to the deflection down shutters on the entire scale.
Fins-Directorate: Convenient to combat the effects of “yaw” (yes, him again!). Can actuate the drift along the fins.
Component-Depth: Operates depth along the shutters and helps combat the torque effect caused by the lowering of the latter.
Depth-Shutters: Provides increased maneuverability of a model. When the depth shines the shutters down and vice versa.
Spoiler: Mixing to use the ailerons as airbrakes. When operating the control of the air brakes both ailerons rise (careful not to remove too much to maintain sufficient upward stroke aileron).
Butterfly or Crocodiles: Mixing to use the ailerons (up) and components (down) as airbrakes. Most effective technique that spoilers but only available on models equipped with flaps and equipped with a servo steering.
Spoiler-Depth: Convenient to fight the effects of torque nose or sting caused by the release of the air brakes.
Engine-Depth: The initiation of an electric motor associated with a large propeller frequently causes a torque effect nose against it easily thanks to this mix.
Free mixers: Like all mixes do not necessarily exist on your transmitter, most manufacturers provided free mixes to achieve the unintended function.
Telemetry: With the arrival of 2.4GHz remote controls, more and more manufacturers offer to visualize in real time what happens in the modèles. Grâce to probes placed in the model and connected to the receiver can know the battery status receiving or propulsion, consumption of the electric motor, its regime, whether the glider rises in an updraft, his speed, altitude, etc …
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