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FlySky FS-ST8 User Manual
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FlySky FS-ST8 User Manual

FlySky FS-ST8 User Manual

Digital proportional radio control system
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USER MANUAL
USER MANUAL
Digital Proportional Radio
Control System
FS-ST8
Copyright ©2025 Flysky Technology Co., Ltd.
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Summary of Contents for FlySky FS-ST8

  • Page 1 FS-ST8 USER MANUAL USER MANUAL Digital Proportional Radio Control System Copyright ©2025 Flysky Technology Co., Ltd.
  • Page 2 If you encounter any problems during using, please refer to this manual first. If the problem is still not resolved, please contact the local dealer directly or contact the customer service staff via the website below: http://www.flysky-cn.com...
  • Page 3 Contents 1. S afet y ..............1 1. 1 S afety Sym bo l s ..............1 1.
  • Page 4 6.2.6 MDL SET - V-TAIL ......................19 6.2.7 MDL SET - DELTA-WING MIX ..................19 6.2.8 MDL SET - TRACK MIX ....................19 6.2.9 MDL SET - PITCH CURVE ....................19 6.2.10 MDL SET - GYROSCOPE1 ..................... 20 6.2.11 MDL SET - GYROSCOPE2 ..................... 20 6 .3 G e n e ra l S ett i n g s .
  • Page 5 8 . 3 Swa pp i n g Gimba ls ..............3 9 8 .
  • Page 6 1.Safety 1.1 Safety Symbols Pay close attention to the following symbols and their meanings. Failure to follow these warnings could cause damage, injury or death. Danger • Not following these instructions may lead to serious injuries or death. Warning • Not following these instructions may lead to major injuries.
  • Page 7 FS-ST8 Digital Proportional Radio Control System 2.Introduction This product uses the 2.4GHz ANT (Ant Protocol) automatic frequency hopping digital system,which includes an FS- ST8 transmitter and an FS-SR8 receiver. It offers an output of 8-12 channels and supports various binding modes to ensure stable communication over long distances.
  • Page 8 2.1.1 Button/Scroll Wheel Operation Instructions for MENU, EXIT and Scroll Wheel. MENU button • In main menu, press MENU in the main page to enter the function menu. • In main menu, press and hold MENU for seconds to enter MONITOR menu. EXIT button •...
  • Page 9 FS-ST8 Digital Proportional Radio Control System 2.2 Receiver Overview (FS-SR8) [13] [14] [15] [16] [15] [14] [13] [20] [12] [19] [11] [10] [21] [17] [18] [1] CH1/PPM [8] CH8 [15] Signal pin [2] CH2 [9] BIND interface [16] LED [3] CH3...
  • Page 10 3. Getting Started Prior to operations, please install the battery and connect devices according to the sequence and guide as described in this chapter. 3.1 Installing Transmitter Battery Danger • Only use specified battery. Danger • Do not open, disassemble, or attempt to repair the battery. Danger •...
  • Page 11 [FAST], it provides better coexistence with lower latency and power consumption. [OUTPUT] Two combined output options are available, including four output modes, namely PWM/S.BUS, PPM/ i-BUS, PWM/i-BUS and PP M/S.BUS. Choose according to your needs. Using the FS-ST8 transmitter and FS-SR8 receiver for binding as an example: •...
  • Page 12 LED changes to slow flash, and at the same time, the receiver LED is solid on, indicating that the binding is completed. • Different receivers have different bind procedures. For more information visit the FLYSKY website for manuals and other related information. •...
  • Page 13 FS-ST8 Digital Proportional Radio Control System 5. Main Interface Instructions are about the main menu. Status bar: To show the signal strength and TX voltage. When the receiver is bound, and the voltage of the receiver is 4.9V, then R4.9V will displayed here. SENSORS The icons shown here indicate that the function is enabled. Lock icon, Flight mode icon, Throttle hold Note: Up to three icon and GPS icon can be displayed here. sensors' information can be displayed here. T3/T4 Trim T1/T2 Trim Model name and model number Timer Quick access to the menu：...
  • Page 14 6. Function Menu Note: This function was updated in version 1.0.57. In this transmitter, we have classified the functions and made a new layout. There are 4 categories in icons in total. That is: TX SET(Transmitter Settings), RX SET(Receiver Settings), MDL SET(Model menu), GENER MENU(General menu).
  • Page 15 FS-ST8 Digital Proportional Radio Control System 6.1 Transmitter Settings Note: This function was updated in version 1.0.57. There are thirteen function menus in TX SET menu: MODEL, TRAINER, THROTTLE ALARM, STICK MODE, CALIBRATION, SYSTEM SETTINGS, TIMERS, SWITCH SETTINGS, BOOT SETTINGS, FIRMWARE UPDATE, ABOUT, HELP CENTER, and FACTORY RESET.
  • Page 16 4. If [MODEL COMB.] is selected: Choose STATUS > ON. Select SWITCH ASS, then press the scroll wheel to enter the setup menu. In the menu, select the desired control or toggle the corresponding physical control. After selecting MOD SELECT, proceed to the next menu level: Choose the models to be combined. The system will display a confirmation prompt. Select OK to confirm. 5. In SELECT TYPE menu, scroll Scroll Wheel to select an appropriate type and press Scroll Wheel to finish. 6. In MODEL COPY menu, scroll Scroll Wheel to select the model for FROM and TO respectively, then select COPY and press Scroll Wheel, a pop-up menu come along with it. Select OK and press Scroll Wheel to confirm. Press EXIT to save and exit. 7. For MODEL RESET, select OK and press Scroll Wheel to confirm in the pop-up menu appeared. 8. If you select RACE MODE and the system will pop up a message, select OK and press Scroll Wheel to close the pop-up window, meaning the relevant alarms have been disabled If you select RACE MODE again, a pop-up message will indicate that the system is already in race mode;...
  • Page 17 For example, if the trainer and the student use two FS-ST8 transmitters for teaching and training. After connecting the two transmitters via the FlySky's trainer cable, set the MODE of the trainer transmitter to TRAINER, as well as setting a control switch. Then set the MODE of the student transmitter to STUDENT.
  • Page 18 6.1.4 TX SET - STICK MODE The transmitter provides four stick modes, you can set it according to your habit. CH1 represents Aileron, CH2 represents Elevator, CH3 represents Throttle, CH4 represents Rudder. Function settings: 1. Select STICK MODE and press Scroll Wheel to enter.
  • Page 19 FS-ST8 Digital Proportional Radio Control System LED COLOR To set the color of the LED. LED To set the brightness of the LED. BRIGHTNESS To set the brightness of the LCD. CONTRAST To set the contrast of the LCD. TIME To set the time of the backlight, namely how long the screen takes to turn off when not in use. Notes: Leaving the screen on for longer will use more power and as such may lead to reduced battery time. If the transmitter enters sleep mode, you can exit sleep mode by operating the scroll wheel, MENU button, EXIT button, or power) button.
  • Page 20 of the throttle after the timer is on. For ALARM, set ON or OFF using Scroll Wheel. If a alarm is set, you need to set the alarm time using Scroll Wheel. Press EXIT to save it. 6.1.7 TX SET - SWITCH SETTINGS Used to set which controls can be assigned including SW class switches, Dials (Upgraded version), buttons on the back(Upgraded version) or Knobs.
  • Page 21 FS-ST8 Digital Proportional Radio Control System 6.1.10 TX SET - ABOUT Used to display the system information, such as hardware version, etc. Function settings: Select ABOUT and press Scroll Wheel to enter, then you can view the related information. 6.1.11 TX SET - HELP CENTER To obtain the user manual via this function.
  • Page 22 6.2 Model Settings Note: This function was updated in version 1.0.57. Used to set the functions related to the model. The functions vary with different models. All functions are CONDITION, RATE/CURVE, THROTTLE CURVE, THROTTLE HOLD, DUAL-RATE/DR, PITCH CURVE, HELI PITCH SETUP, GYROSCROPE, DELTA-WING MIX,V-TAIL and TRACK MIX.
  • Page 23 FS-ST8 Digital Proportional Radio Control System Function settings: 1. Select THROTTLE CURVE and press Scroll Wheel to enter. Select a point you want to set and press Scroll Wheel, then select a value you want to set and press Scroll Wheel to confirm. Press EXIT to save the settings and exit. 6.2.4 MDL SET - THROTTLE HOLD Note: This function was updated in version 1.0.57.
  • Page 24 6.2.6 MDL SET - V-TAIL This function is designed for specific aircraft models, such as fixed-wing aircraft with V-tails. It allows you to perform mixing control for both channels in the same direction or in the reverse direction. Function settings: 1.
  • Page 25 FS-ST8 Digital Proportional Radio Control System Function settings: 1. Select PITCH CURVE and press Scroll Wheel to enter. Select a point you want to set and press Scroll Wheel, then select an appropriate value and press Scroll Wheel to confirm. Press EXIT to save the settings and exit. 6.2.10 MDL SET - GYROSCOPE1 Note: This function was updated in version 1.0.57.
  • Page 26 6.3 General Settings Used to set or adjust the general functions which are commonly use inculding MONITOR, REVERSE, END POINTS, CH SPEED, AUX CH, TRIMS and MIXES. In the main interface, press MENU to enter the function menu. Select GENER MENU by scrolling Scroll Wheel press Scroll Wheel...
  • Page 27 FS-ST8 Digital Proportional Radio Control System 6.3.3 GENER MENU - END POINTS(Including SUBTRIM) Adjust the travel amount of the servo output. This function is used in debug. This function can be used to set the travel of the HIGH, LOW and SUBTRIM at both ends of the channel respectively.
  • Page 28 6.3.6 GENER MENU - TRIMS To set the step value of the trims. Function settings: 1. Select TRIMS and press Scroll Wheel to enter. Select a trim you want to set and press Scroll Wheel. Select an appropriate value then press Scroll Wheel. Press EXIT to save the settings and exit. 6.3.7 GENER MENU - MIXES Note: This function was updated in version 1.0.57. MIXES is enabled for some models that require two channels to act in linkage. For example, you can perform rudder compensation so that the aircraft will not lift its nose when throttling up.
  • Page 29 Select FAILSAFE JUDGMENT TIME and press the scroll wheel. The option box will start blinking. Scroll the wheel to set the desired value, then press the scroll wheel to confirm. For i-BUS/PPM/PWM signal. The FS-ST8 system support there options including NOT SET, NONE or ON. NO SET: The failsafe has not been set, and there is no output in case of out-of- control.
  • Page 30 Notes: Because the S.BUS signal contains the failsafe flag bit, the receiver can transmit the "Failsafe State" information to the subsequent device through the failsafe flag bit, instead of using OFF. The subsequent device can make response accordingly by parsing the failsafe flag bit information.
  • Page 31 6.4.4 RX SET - SENSOR CALIBRATION This function is a special feature provided by FLYSKY. The setting allows you to make corrections to the parameters of some external sensors that need to be calibrated, so as to display the sensing data accurately. For example, for the external voltage sensor (BVD), after calibration, the displayed data will be closer to the real value.
  • Page 32 6.4.6 RX SET - i-BUS SETTINGS This function is a unique and powerful serial communication protocol system provided by FLYSKY. It can be output to any channel by setting. For receivers with i-BUS interface and corresponding accessories, such as Serial Bus Receiver FS-CEV04.
  • Page 33 FS-ST8 Digital Proportional Radio Control System 6.4.8 RX SET - RF SETTINGS This is an extended function option. The setting is used when the external RF module is needed. The EXT RF can be set to one of the following items: OFF, PPM.P, PPM.N, S.BUS, FRM303, CRSF and CRSF2, so as to be compatible with the external RF module with different protocol.
  • Page 34 then press the scroll wheel to confirm. Select SOUND and press the scroll wheel to toggle between ON or OFF. Select VIBRATION and press the scroll wheel to toggle between ON or OFF. Note: If the alarm sound are turned off (SYSTEM SETTING> SOUND/ VOLUME), the alarm sound will not be triggered even if it is enabled here. 6.4.10 RX SET - TELEMETRY ALARM Note: This function was added in version 1.0.57.
  • Page 35 Wheel to enter. 6.5.1 RX SET - BIND SETTINGS After the FRM303 RF module is connected to the FS-ST8 transmitter, it can be bound with the FlySky 3nd generation receiver (classic edition and enhanced edition). If binding with the classic edition receiver, RF system can choose CLASSIC 18CH or C-FAST 10CH. And for the enhanced edition receiver, ROUTINE 18CH, FAST 8CH or LORA 12CH can be selected.
  • Page 36 6.5.2 RX SET - PORT PROTOCOL Set the type of output signal of the receiver interface. The interface shown on the left side can be set, and on the right side, the protocols that can be set. For enhanced edition receiver: When no receiver is connected, 4 Newport interfaces are displayed by default for setting;...
  • Page 37 FS-ST8 Digital Proportional Radio Control System SET ALL CHANNELS All channels are set to the same value. it can be set one of NONE, HOLD, or FIXED VALUE. NONE Means that there is no output in case of out-of- control.
  • Page 38 6.5.5 RX SET - SIGNAL STRENGTH Through this function, you can select a channel to output the signal strength value of the receiver. After the function is enabled, the selected channel does not perform the output of transmitter's corresponding channel function, but outputs the receiver's signal strength value.
  • Page 39 FS-ST8 Digital Proportional Radio Control System 6.5.7 RX SET - GPS SETTING Please refer to 6.4.3 RX SET- GPS SETTING for this function. 6.5.8 RX SET - RF SETTINGS Except the functions described in 6.4.8 RX SET-RF SETTING section, it can also enable or disable the buzzer alarm function, and you can set an appropriate power if the FRM303 RF module support power regulation by POWER SETTING function.
  • Page 40 7.4 Updating the Firmware of the Receiver The firmware of this receiver is updated through the FlyskyAssistant (Only version 3.0 or above is supported. The firmware of FlyskyAssistant is available on the Flysky official website). This receiver can be updated via the following two ways: After the binding between the transmitter and the receiver (the LED of the receiver is solid on), connect the transmitter to thecomputer, then open the FlyskyAssistant on the computer to update the firmware.
  • Page 41 8.1 Throttle Metal Bracket Installation FS-ST8 transmitter has two sticks in the factory settings, and one is the self-centering stick. To use the non self- centering stick, please follow the steps below to replace the self-centering stick to the non self-centering stick. The throttle plate includes two types: setback sense throttle plate and non setback sense throttle plate (the installation steps are the same).
  • Page 42 Pay attention to the bending direction of the throttle plate. 5. Remove the spring hook assembly carefully. 7. Put the throttle plate to the position which is shown above, then screw it using the screws. You can install the setback sense throttle plate or non setback sense throttle plate here. If the screws are too tight or too loose, this may bring different hand handle. 8. Carefully insert the back cover wiring plug into the motherboard, re-close the transmitter back cover, and tighten the screws. 6. Place the plate assembly back in its original position, then secure it with the original 4 screws.
  • Page 43 FS-ST8 Digital Proportional Radio Control System 8.2 Throttle Spring Installation The following instructions explain how to change the non self-centering to self-centering. 1. Take the transmitter apart and remove the gimbal, then remove the two screws which are shown above and remove the throttle plate. 4. Place the spring hook assembly into position and hook the spring onto the hook located inside the transmitter. 2. Loosen the assembly screws shown above first, then remove the plate assembly. Be careful to ensure no damage to cables. 5. Place the plate assembly back in its original position, then secure it with the original 4 screws. 3. Insert the 2 dowels as shown above.
  • Page 44 8.3 Swapping Gimbals When changing between modes 2/4 (M2/M4) and modes 1/3(M1/M3), you will need to switch the gimbals around so that the throttle gimbal is on the correct side. 3. Reassembly the transmitter. 1. Take the transmitter apart using a screwdriver, remove the 8 screws marked in red. 4. Turn on the transmitter and make sure everything is working as expected via Main menu > GENER MENU> MONITOR. 2. Swap the gimbals and rotate them 180 degrees, then line them up with the screw holes and secure the screws. (There is no need to disconnect the cables.).
  • Page 45 FS-ST8 Digital Proportional Radio Control System 8.4 Device Holder Installation Mobile devices, such as mobile phone, can be used in real time to receive information from an aircraft, it may be fitted into the mobile device bracket for your convenience.
  • Page 46 8.5 Stealth I/O RF Module Adapter Installation If you have purchased the RF module adapter, fix it on the transmitter by following the steps below: 1. Place the left and right RF module adapters as 2. Tighten the four screws to secure the RF module shown in the figure. Remember to align the screw adapters. holes. Note: The transmitter Stealth I/O RF module interface is designed without power supply, Stealth I/O RF module interface pins are defined as shown in the figure below. If you connect the RF module externally through the RF module adapter, you need to supply power to the RF module separately. PPM/TX S.port Stealth I/O RF module interface...
  • Page 47 FS-ST8 Digital Proportional Radio Control System 8.6 Antenna Assembly Installation If you have purchased 2.4G antenna assembly inner-screw-inner-hole, the installation procedure is described below. Remove the antenna hole plug small adhesive piece with the help of tweezers and other tools along the direction as shown.
  • Page 48 8.7 Gimbal Repalce Instruction The factory-adapted gimbal assembly of the transmitter is the potentiometer version, if you want to change it to FlySky's hall gimbal, then follow the steps below to replace the gimbal. 1. Follow the previous steps to disassemble the transmitter. Note： A-A：Connect the USART backplane to the SPI backplane；...
  • Page 49 FS-ST8 Digital Proportional Radio Control System 9. Product Specifications This section contains FS-ST8 transmitter and FS-SR8 receiver specifications. 9.1 Transmitter Specifications (FS-ST8) Product Model FS-ST8 Number of Channels 8-12 Compatible Receiver FS-SR8 ( Adapts receiver with ANT protocol ) Fixed-wing aircraft, helicopters, gliders, delta-wing airplanes, multicopters,...
  • Page 50 9.2 Receiver Specifications (FS-SR8) Product Model FS-SR8 Compatible Transmitters FS-ST8 (Adapts transmitter with ANT protocol) Fixed-wing aircraft, helicopters, gliders, delta-wing airplanes, multicopters, racing Compatible RC Models drones, engineering vehicles, robots, cars or boats, etc. Number of PWM Channels 2.4GHz ISM...
  • Page 51 FS-ST8 Digital Proportional Radio Control System 10. Package Contents This section contains packing list information. Different versions have different configurations, please consult your dealer for details. For Standard Edition Number Name Quantity Remark FS-ST8 Transmitter FS-SR8 Receiver Quick Start Guide...
  • Page 52 11. Certifications 11.1 DoC Declaration Hereby, [ShenZhen FLYSKY Technology Co., Ltd.] declares that the Radio Equipment [FS-ST8] is in compliance with RED 2014/53/EU. The full text of the EU DoC is available at the following internet address: www.flyskytech.com/info_detail/10.html. 11.2 CE Warning The ce warns that the installation of the antenna used in this transmitter must be kept in distance from all the personnel and shall not be used or used with any other transmitter.
  • Page 53 FS-ST8 Digital Proportional Radio Control System 12. Environmentally friendly disposal Old electrical appliances must not be disposed of together with the residual waste, but have to be disposed of separately. The disposal at the communal collecting point via private persons is for free. The owner of old appliances is responsible to bring the appliances to these collecting points or to similar collection points.
  • Page 54 Copyright ©2025 Flysky Technology Co., Ltd. Release date: 2025-04-22 CE, FCC ID： N4ZST800 Manufacturer:ShenZhen FLYSKY Technology Co., Ltd. Address: 16F, Huafeng Building, No. 6006 Shennan Road, Futian District, Shenzhen, Guangdong, China...