News
News
Answer: The operation of model aircraft is basically achieved through the remote control in the hand. The joystick and paddle on the remote control are operated, and the corresponding operation signal is transmitted through the transmitter of the remote control. The receiver on the aircraft receives the corresponding signal and converts it into instructions to transmit to the corresponding servo action, so as to make the corresponding control surface move as needed. The movement of the control surface affects the flow of air and drives the aircraft to make corresponding responses.
Answer: A simulator is a software program that simulates real-world model flight operations, site environments, and aircraft control, allowing users to master basic flight operations such as throttle response, rudder response, and aircraft attitude response. Commonly used simulators include Phoenix RC (commonly known as Phoenix), RealFlight G4 (commonly known as G4) Reflex XTR、FlyingModelSimulation。 The simulators sold online are like this, usually accompanied by a CD and an encryption dongle (the simulator software has confidentiality measures and requires the use of an encryption dongle for decryption, similar to the shape of a USB flash drive).
Answer: When a model airplane is launched, a device is needed to control it, which is a remote control. The corresponding device on the airplane needs to be able to receive instructions from the remote control, which is a receiver. The remote control and receiver communicate through radio waves, with commonly used frequencies being 72MHz and 2.4GHz. The remote control can be used to set some flight parameters, such as the forward and reverse throttle, joystick sensitivity, neutral position adjustment of the servo, channel function definition, aircraft time recording and reminder, paddle function setting, advanced functions including battery voltage and current data returned by the model airplane, and so on.
Answer: The communication between the remote control and the receiver is carried out using radio waves. The commonly used frequencies for this radio are 72MHz and 2.4GHz. In the early days, 72MHz long waves were mainly used, and long remote control antennas can be seen on the remote control. Nowadays, technological progress is gradually adopting 2.4GHz short waves, and the wires on the remote control only have a short small antenna.
Answer: When using a 72MHz remote control, due to the openness of radio waves, a channel is allocated every 20kHz between 72.010MHz and 72.99MHz in the 72MHz frequency band, for a total of 50 channels. This way, there is a frequency generator (crystal oscillator) with the same frequency on both the remote control and the receiver, allowing communication between the receiver and the remote control at the same frequency. With the advancement of technology, 2.4GHz remote controllers no longer require separate matching crystals. Instead, they only need to perform frequency calibration directly with the receiver, establishing a communication connection between the remote controller and the receiver. For household remote control toys, due to requirements and price reasons, 40MHz and 27MHz are mainly used. Remote controls with the same frequency can sometimes be used interchangeably. This problem also exists in model aircraft. Therefore, when using 72MHz remote controls in the early days, when model friends arrived at the airport, they would first understand each other's remote control frequency bands to avoid communication errors. The commonly used 2.4GHz does not require it.
Answer: Remote controllers usually have several channels for control, commonly known as "several channels". For example, the common "TianDiFei 6" has six channels. A model airplane, some of its components need to be manually controlled through a remote control. For example, power control, commonly known as throttle, elevator, rudder, ailerons, flaps, landing gear, smoker, lights, etc., requires a separate channel for each item to be controlled. However, some items require precise and stepless operation, such as throttle, lift, direction, ailerons. Some items are fixed in several gears for operation, such as flaps, landing gear, lights, etc. For the above remote controllers, there are joysticks and levers defined, such as using joysticks to operate throttle, lift, direction, ailerons, and using levers to operate flaps, landing gear, lights, etc.
Answer: Due to the early development of model airplane activities in Japan and North America, there are different functional definitions for the two joysticks and four channels in the controller in these two regions. Like Japanese hands, left joystick: up and down elevators, left and right rudder; Right joystick: Up and down are throttle control, left and right are aileron control. American hand, left joystick: throttle control up and down, left and right directional control; Right joystick: Up and down are elevators, and left and right are ailerons. This is mainly based on personal preferences, such as driving. There are left-hand drive vehicles, mainly in Chinese Mainland and North America, right-hand drive vehicles, major Commonwealth countries and some regions, such as the United Kingdom and Hong Kong. From a theoretical safety perspective, left-hand drive cars are better in the northern hemisphere, but the main issue is still the development of habits. The advantages and disadvantages of American and Japanese hands usually lie in the difference in operating speed in some extremely difficult movements. Generally, Japanese hands are more commonly used in fixed wing operations, while American hands are more commonly used in helicopter operations.
Answer: The remote control is an imported and domestic brand. Domestic brands include Tiandi Fei, Walkera, FlySky, FrSky, and RadioLink. Imported brands include Futaba (Japan), JR (Japan), ROBBE (Germany), and Graupner (Germany). In the early days, the electronic level in China was poor, and the quality of the control was average. Nowadays, the quality of the control in China is also quite stable, and the cost-effectiveness is high. The remote control mainly pursues practicality and stability, and should not excessively pursue high-end configurations. The Chinese interface of the domestic remote control is simple to operate, the price is affordable, and the matching receiver is also cheap. A set of remote control and receiver can not exceed 1000 yuan. Choose Futaba T8FG 14SG, JR 9X XG7XG11 , The starting price for a set is over 1500 yuan, and the receiver is expensive. Novice models can start with FS-I6 or FrSky Tanaris X9D, and then upgrade according to the needs of the aircraft being played. Usually, fixed wing aircraft and helicopters only require six channels for control, and even four channels in the early stages, namely throttle, ailerons, takeoff and landing, and direction.
Answer: EXP is an exponential curve, and we can change the corresponding relationship between the joystick and the servo's response to the servo's movement. Just like it was originally a straight line, it can be adjusted to curve upwards, such as changing quickly when the throttle is low, changing slowly when the throttle is high, and so on.
By setting the EXP curve, the corresponding relationship between control and servo response can be adjusted according to personal habits.
Answer: When the aircraft is powered on first, it is in a state where there is no controller to control it. The electronic devices such as propellers and servos of the aircraft may start on their own, which is very dangerous. Therefore, it is necessary to turn on the control first, so that the aircraft can always have remote control signals to control it when powered on. vice versa.
Answer: This mainly refers to the encoding method of the remote control. PPM is equivalent to analog transmission, which directly sends the radio waveform to the receiver and transmits it to the servo for execution. PCM first processes the signal to form a digital model and encodes it before transmitting it. The receiver needs a decoding and restoration process before transmitting it to the servo for execution. Similar to previous analog signal transmission televisions and current digital signal televisions.
Answer: After receiving the remote control, please read the manual carefully and remember to carefully refer to the remote control. Familiarize yourself with the functions of each knob and lever on the control, as well as how to adjust the operating interface of the control system, such as how to set the shutdown switch, the corresponding lever and joystick for each channel, and the positive and negative settings of the channel. This will lay the foundation for your next step. When you ask questions, you can accurately obtain answers. Otherwise, if you cannot accurately describe the problem yourself or answer the questions, it will be difficult to solve the problem.
