Guides and Tutorials

As the technology keeps evolving, the RC world has been ever changing. Are you confused by all the new acronyms? So many different configurations, what should I select? In this section, we cover most commonly asked questions. You are very welcome to contact our tech support if you have more questions. 

PNP stands for Plug-N-Play, which has the motor, servos and ESC installed already. You will need to install you own battery, receiver and transmitter to fly the aircraft.

BNP stands for Bind-N-Play (equivalent to BNF, i.e. Bind-N-Fly). It is equipped with all BNP components and additionally, a 6-channel 2.4GHz receiver with integrated gyro stabilizer (MSR66A) is pre-installed. The BNP airplane is exclusively designed for Detrum transmitter owners. If you own a 6-channel and above Detrum transmitter, you can bind your transmitter with the MSR66A receiver, install your own battery and you are good to go. Please visit MSR66A product page for detailed information and all the benefits this technology brings to you.

SRTF stands for Smart-Ready-to-Fly (a upgraded version of RTF). The package comes with a Detrum Gavin 6A 6-channel transmitter, a battery charger, a standard Li-Po battery additional to all the BNP components. This package has minimized the assembly time to have the airplane ready to fly. You may enjoy the time saved and spend it in the filed flying more. Again, please visit MSR66A product page for detailed information and all the benefits this technology brings to you.

Safety first! It is very critical to perform a pre-flight check for your first-time flight. Below list include major steps we are recommending to ensure a successful first time flight. Note: this is not an exhaustive list of items. Please refer product manuals for more details.

1. Visual inspection for any mechanical issues both interior and exterior, i.e. if positions for wing, tail, landing gear are in place; if wire routing in proper place; if motor can be turned freely without any special noise; if battery is securely installed; if control linkage/servos is properly installed free of any restriction.

2. Aircraft balance. Check if the aircraft is balanced longitudinally and the Center of Gravity (C.G.) is per the product manual.

3. Transmitter check. Turn on the power and ensure enough power is supplied. Check if the correct mode (mode 1 or mode 2) is selected. Check if transmitter is in correct type selection, i.e. airplane, helicopter or multicopter.

4. Functional test. For airplane, check all servos are controlled correctly, including orientation and initial trim. Check the power system is working without issues, such as excessive vibration, sudden power jump, or scraping noise. Check the landing gear can operate correctly if applicable.

5. Transmitter range test. All Detrum radio system has the range test mode. Please follow the product manual to perform this test.

6. Environmental test. Turn on the transmitter to check if there is any interference. In addition, please fly in good weather conditions to avoid any damage to the electrics on the aircrafts.

7. The last step, before turning on the transmitter, always make sure the transmitter throttle stick and throttle trim are in the lowest position.

The 3-in-1 program card is used to set the programmable parameters for ESC/stabilizer and also can be used to measure the voltage for Li-Po battery. Please refer the product manual for details. Below is the functional description for the program card.

- Connect with the ESC to set its programmable parameters. It is applicable for Skylord Advanced series brushless aircraft ESCs, Volcano series brushless car ESCs.

- Connect with the stabilizer or receiver with integrated gyro stabilize to set its programmable parameters. It is applicable for ISTONE-AII stabilizer, MSR66A stabilized receiver.

- Work as a voltmeter to measure the voltage of the whole battery pack and each cell. It is can be used for 2S to 8S Li-Po battery.

Let's take setting MSR66A’s parameters via 3-in-1 programming card as an example. After powering on the MSR66A, connect it to the 3-in-1 program card with a USB cable. The program card should read the current parameters, and then the program card directly enters into the main user interface where a user can set parameters accordingly.

The parameters include: Fly Mode, Yaw Gain, Roll Gain, Pitch Gain, Roll Offset, Pitch Offset, Mount Dir, and Wing Type.

The 2.4 G technology has been widely utilized on the RC transmitter several years ago. It first started with FHSS (Frequency Hopping Spread Spectrum) modulization technology, then DSSS (Direct Sequence Spread Spectrum). As both technologies have their pros and cons, RC manufacturers developed technology that combines two modulization processes together. Nowadays, most commercial available transmitters are using both technologies for better noise avoidance and greater transmission range.

Detrum started developing its own protocol since 2015, which had been named DT-Link. Combining both FHSS and DSSS modulization technologies, with optimized random frequency hopping, the DT-Link powered Gavin series radio is capable of transmitting the signals in the open field interference free with a rage of 1.6 KM (1 mile). You can enjoy the flying with a peace of mind!

What’s next? The transmitter with telemetry capability is being developed. All current Gavin Transmitters are dual-direction transmission capability ready, as soon as the telemetry software is ready, the current customers are able to receive the upgrade with a simple USB download and installation.

Detrum Gavin radio system, a foundation to make the RC flying smarter and more joyful, with RC airplane and RC technologies are all under one umbrella, more and more new leading products are on the way.

SRTF stands for Smart-Ready-to-Fly (a upgraded version of RTF). The package comes with a Detrum Gavin 6A 6-channel transmitter, a battery charger, a standard Li-Po battery additional to all the BNP components. With the SRTF package, you can stay with a peace of mind and focus more on enjoying the flying. Below features are SRTF RC airplanes bring to you:

Pre-set stabilizer parameter. For beginners, setting the appropriate stabilizer parameters for the airplane can be a hassle. With hundred hours of flight testing for each airplane, the results are standardized and the optimized parameters are set prior to the final manufacturing process. Just charge the battery, complete the first-time check list process and you are good to go.

4 flight modes for different level of hobbyists. All SRTF RC airplanes have been equipped with a receiver integrated with a gyro stabilizer (MSR66A), which provides four flight modes: Gyro Off, Normal, Aerobatic and Auto-Balance. Depending on your experience, you may select one of these modes that best suit your requirements.

Fast rescue. To activate the Auto-Balance Mode (ABS) when the aircraft flying unstable or you are at the edge of losing control, you just need to perform an one-click switch, the airplane will recover to the level flight automatically. This mode is a great helper for the beginners or the FPV (First Person View) applications.

A complete drone video transmission system comprises of an airborne system and a ground system where the airborne system is the transmitter and the ground system is the receiver. The airborne system obtains video signals from the onboard digital camera, modulates received information and transmits it back to the ground system. The ground system receives the information, demodulates and sends video signals to a monitor device.

In order for synchronous video transmission and first person view (FPV) use, DetrumTech has designed the 5.8GHz analog video transmission system – DVT58 & DVR58. The DVT58 works as a transmitter, which is installed on the aircraft. The DVR58 works as a receiver, which is connected to a monitor device to display the video.

Three levels of 5.8G transmitters have been designed according to output power: DVT58 600mW, DVT58 200mW and DVT58 25mW. In open area without any block, the transmission range of DVT58 600mW is 1,500 meters, DVT58 200mW is 800 meters, and DVT58 25mW is 400 meters. DVR58 can be used with any one of them.

The video format of the AV input supported by DVT58 is NTSC/PAL. The analog camera which can output NTSC/PAL video is compatible with this equipment. The output signal of the DVR58 is CVBS signal, which drives the monitor device with an AV input interface.

Below are features of DVT58 and DVR58:


- 48 adjustable channel and the channel number can be displayed on the LED digital displays.

- Miniature in size, lightweight and fast heat dissipation, great for aircraft applications.

- Adopt omnidirectional mushroom antenna to transmit the signals.

- Integrated wires and plugs, easy to install.

- Multiple 5.8G receivers can be linked at the same time, make it possible for you to share you real-time flying to multiple viewers.


- 48 adjustable channels, the channel number can be displayed on the LED digital displays

- 12V/1A output interface, providing a stable voltage for the video display

Drone flight control system is the brain of the entire drone, which is to stabilize the aircraft’s attitude and control the aircraft’s autonomic or semi-autonomic flying. A typical flor control system is composed of gyro, accelerometer, pressure sensor, geomagnetic sensor (compass), GPS and the control circuit.

- The gyro is used to measure the roll, pitch and rudder angle of the aircraft.

- The accelerometer is used to measure the accelerated velocity of roll, pitch and rudder.

- The pressure sensor is used to the atmospheric pressure of the current position, then calculate the pressure difference to obtain the current altitude.

- Geomagnetic sensor (ie, electronic compass), is used to measure the geomagnetic field, to obtain the aircraft’s flight direction, head orientation, and to locate the pre-programed flying routing positions and Home Point for auto-landing.

- GPS is used to measure the position information of the aircraft.

The Sentan system is a flight controller for various multi-rotor platforms (quad-rotor, hexa-rotor, and octo-rotor). The package includes the GPS+COMPASS module, the power management unit (PMU), the LED, and the ESC to achieve the mission to control the aircraft.

(1) Flight Controller. Compared with similar products, the Sentan flight controller is a highly integrated system which incorporates the 3-axis gyro, the 3-axis accelerometer and the pressure sensor all into the control circuit. Therefore, the IMU (inertial measurement unit) module, which is used to measure the aircraft’s attitude and altitude, is also integrated in the flight controller. With these integrated components, the flight control is able to control the balance of the aircraft in flight. This is achieved by (1) the IMU that measures the tilt angle of the aircraft; (2) the flight controller calculates the compensation direction and angle according to the current data and (3) sends the control signal to the motor to complete the compensation action.

(2) GPS Module. The GPS module has a built-in GPS and compass. The compass is used for geomagnetic field measurement and cooperating with the GPS to realize the altitude hold function. After acquiring the GPS positioning information, orientation information from the compass, as well as the attitude and altitude data from the IMU, are sent to the flight controller. The flight controller then obtains the aircraft’s current location, distance of the task (or position and distance of the Home Point), the current speed and altitude, then the flight controller controls the aircraft flying to the target position.

(3) PMU Module. It is the power management unit for the flight control system.

(4) LED. The LED acts as flight control system status indicator during flying so the pilot is able to better interact with the aircraft.

The Sentan flight control system supports normal flight modes (including attitude mode, altitude hold mode, and GPS attitude mode), intelligent orientation control modes (including heading lock mode, home lock mode, and circle mode), and Return-to-Home (RTH) modes (smart RTH, low battery RTH and radio failsafe RTH).

We are in a world where electrification is changing our life almost every day. The Bitgo Hobby is a firm believer that the RC electrification will become more and more popular. If you want to retrofit the glow engine powered RC airplane to electronic motor, you may choose the appropriate electronic motor per below simple process. TomCat G Series motors are designed to facilitate the electrification.

For example, TomCat G52 5025-KV590 Brushless Motor, the naming format of the part number is as follows:

- G52 indicates the motor is suitable to replace G52 glow engine.

- 50 indicates the rotor diameter is 50 mm.

- 25 indicates the rotor height is 25 mm.

- KV590 indicates the revolution per volt of the motor is 590.

If you have any technical question, please do not hesitate to contact us. In addition, if you would like to share your electrification experience, we would love to hear from you.

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