SR86A 8 Channel 2.4GHz Receiver
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Specifications
- Channels: 8
- Frequency: 2.4GHz
- Gyro: 6-axis
- Flight Modes: Gyro off, Normal, Aerobatic, Auto-Recovery
Product Usage Instructions
Quick Start
- Before installing, ensure all surfaces are well connected.
- Create a model and assign a 3-position switch to the servos
using linkage rods. - Mount and connect SR86A, binding it to your transmitter
beforehand. - Power on the airplane, ensuring correct channel directions and
trims are set. - Set mounting direction, wing type, etc.
Set the Airplane by Transmitter
- Power on the transmitter and create a new airplane model with a
3-position switch for flight mode control. - Check the Gyro direction and adjust gain and settings.
- Mount SR86A on the airframe, connect required channels to
control surfaces. - Power on the airplane, wait for LED on SR86A to finish
initialization. - Set programmable items using the transmitter.
- Switch to Gyro Off Mode, adjust servo neutral positions.
- Switch to Normal Mode, check gyro direction and make
adjustments as needed. - Set programmable items and begin your first flight after all
settings are completed.
Installation
SR86A should be mounted inside the airframe using provided
double-sided tape. Follow these principles:
- Securely mount on the platform inside the airframe.
- Ensure proper positioning for optimal performance.
FAQ
Q: How do I know if the SR86A is properly initialized?
A: The LED on SR86A will display a fast green flashing light
when calibrating the gyro and sticks. Once initialization is
successful, the LED will show the current flight mode.
Q: What should I do if the servos move in the wrong
direction?
A: Reverse the servo direction on your transmitter. If trims
were set, redo Step 3 to reinitialize SR86A.
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Detrum SR86A Instruction Manual V1.1
Thank you for purchasing our products. SR86A is an 8-channel 2.4GHz receiver integrated with 6-axis gyro. It is suitable for normal wing, fly-wing, and V-tail airplanes.
Quick Start
Before installing, make sure: All the surfaces are well connected to
Create a model, assign a 3-position switch
the servos by the linkage rods.
Mount and connect SR86A
Bind the receiver to your transmitter in advance.
Power on the airplane, finish the initialization
All channel directions and trims are set to the correct position.
Set the mounting direction, wing type, etc
Follow these steps to complete your first-time installation.
Set the airplane by transmitter
1. Power on the transmitter and create a
Check the Gyro direction
new airplane model. Assign a 3-position switch for the flight mode
Adjust the gain and other settings, begin to fly
control and make sure the switch does not have other function.
2. Mount the SR86A on the airframe and connect its required channels to corresponding
control surfaces.
3. Place the airplane on the ground and power it on, the LED on SR86A will start fast
green flashing, which means it is calibrating the gyro and the sticks, don’t move the
airplane and the sticks during this period. After a successful initialization, the LED
displays the current flight mode.
4. After a successful initialization, use the transmitter to set the programmable items
(mounting direction, wing type, etc.).
5. Switch to Gyro Off Mode. Adjust the neutral position for all servos. Check the direction
of movement of the servos by moving the stick one by one. If the servo moves in an
opposite direction, reverse it on your transmitter (for details, please refer to the
instruction manual of transmitter).
CAUTION: If you have set the trims in this step, please redo Step 3 to initialize SR86A.
6. Switch to Normal Mode, check the gyro direction one by one, and reverse it if the gyro reacts in a wrong direction.
7. Use the transmitter again to set the programmable items (assigning the desired flight mode to the 3-position switch, adjusting the gain, etc.). After completing all the setting, begin your first flight.
Introduction
SR86A is an 8-channel 2.4GHz receiver integrated with 6-axis gyro, provides four different flight modes: Gyro off, Normal, Aerobatic, and Auto-Recovery (Auto Balance). It can be programmable from the matched transmitter.
Antennas
Bind button LED indicator
Signal VDD GND
The port descriptions of SR86A are list in the table below. For each channel, the signal wire is close to the top of SR86A, middle is VDD and bottom is GND.
AILE
Aileron channel
ELEV
Elevator channel
THRO
Throttle channel
RUDD
Rudder channel
GEAR
Gear channel
AUX1
Auxiliary channel 1
AUX2
Auxiliary channel 2
AUX3
Auxiliary channel 3
Note: For delta-wing airplane, the left and right aileron servos are connected to
the AILE and ELEV channels. For V-tail airplane, the left and right rudder servos
are connected to ELEV and RUDD channels.
Installation
SR86A should be mounted on the platform inside the airframe by using one of the provided double-sided tapes. The installation position should follow the principles below.
Close to the center of gravity (CG). SR86A’s heading direction must be the same as the airplane’s heading direction. The edges of SR86A are all parallel with the corresponding axes of the airplane.
SR86A can be attached flat or upright. There are four different mounting directions: face
up, face down, face left, and face right, as shown in the figure.
Face up Up
Face down Up
Heading direction
Right
Heading direction
Right
Face left Up
Heading direction
Heading direction Right
Face right Up
Right
Installation precaution: You need only one piece of the double-sided tapes each time. A soft or thick mounting
may hinder the performance of the gyro. Please use the double sided tape comes with SR86A, do not use hot-melt glue or belt. Please make enough space around SR86A, stay away from motor, ESC, and battery,
cannot be touched by servo horn, linkage, or other movable parts. Place the antennas in an open space, do not block them. Position the heads of two
antennas at 90-degree angle, do not place the two antennas twisted together or in parallel.
Binding
In order for the transmitter and receiver to communicate, it is essential to pair or bind them together. When you use the R/C system first time or change a transmitter, this procedure is necessary. Each transmitter has an individually assigned, unique ID code. Once the binding is made, the ID code is stored in the receiver and no further binding is necessary after restarting the receiver. Preconditions: Move the throttle stick to the lowest position and make sure the transmitter is powered
off. Place the transmitter and the receiver close to each other within a distance of about 1
meter. Steps: 1. Power on SR86A. The LED indicator will start fast red flashing, indicating the
transmitter is off. 2.Long press (more than 2 sec) Bind button, the LED indicator will start slow red flashing,
indicating the receiver is in bind mode and ready to be bound to the transmitter. 3. Put the transmitter in bind mode, the system begins to bind. 4.Once the LED on SR86A stays green, indicating the receiver is bound to the transmitter.
1 second later, the LED starts fast green flashing, indicating entering the initialization process.
Initialization
After powering on the RC system or after binding, SR86A will enter the initialization process and the LED will start fast green flashing, which means it is calibrating the gyro and the sticks. Do not move the airplane and the sticks during this period, otherwise SR86A will recalibrate repeatedly (a maximum of 10 seconds). If the calibration is successful, SR86A will switch to flight mode and the LED will display
the current flight mode.
If the calibration is failed, the LED will stay red, which means the calibration is failed (the gyro is unavailable), SR86A is used only as a receiver. You have to restart the power to initialize SR86A again.
Flight Mode
User a 5-channel or higher transmitter, assign a 3-position switch for the flight mode control and make sure this switch does not have other function. Then you can switch the flight mode with it. SR86A provides four different flight modes. The LED indicates the current flight mode (for details about the LED status, please see LED Descriptions). The descriptions of the flight modes are as follows. Normal Mode: In this mode, the gyro will sense angular velocity on each axis and
make a momentary reaction. The normal mode is suitable for all types of airplane. It can effectively improve the stability of your airplane, especially on a windy day. Aerobatic Mode: By adding the attitude hold function to the gyros, it will lock the airplane to its previous attitude if there is no command sent from the transmitter in a flight. This mode can effectively help you to accomplish an aerobatic flight. Operate the sticks in this mode, SR86A won’t affect the operation and can improve the stability of the airplane. Once release the sticks, SR86A will save the previous flight attitude and lock the airplane to this attitude. Flying in Aerobatic Mode, do not drastically adjust the trims, excessive trims will affect the judgment of neutral position for the transmitter. Please set the trims during test, and then turn off and power it on. Gyro Off Mode: Choose this mode to disable the gyros for all channels. The airplane will be completely under the control of the transmitter, and SR86A will act only as a receiver. Generally, it is only used to test. Auto-Recovery Mode (also called Auto Balance Mode): Choose this mode to lock the tilt angle on pitch and roll axis. When operating in this mode, the airplane will maintain level flight automatically. When switch it to this mode from any other modes in an emergency, the airplane will recover to the level flight automatically, which it is known as one-click rescue. This mode is suitable for the new beginners or the FPV (First Person View) applications.
Setting the Programmable Items
After installing and initializing, set SR86A’s programmable items with matched transmitter. Programmable items include: mounting direction, wing type, roll/pitch/yaw gain, flight mode, offset on roll/pitch, etc. For details about the setting methods, please refer to the instruction manual of transmitter.
Appendix
LED Descriptions
LED Binding Red, slow flashing Green Initialization Red, fast flashing Green, fast flashing Red Flight Mode Green Blue Purple Blue-green
Specifications
Items Channels Sensor Sensitivity Output Input Voltage Size Weight
Descriptions
The receiver is ready to be bound to the transmitter The binding is successful
The remote control signal is lost (or the radio is off) It is calibrating the gyro and the stick Fail to calibrate, SR86A used only as a receiver
Gyro Off Normal Mode Aerobatic Mode Auto-Recovery (Auto Balance)
Specifications 8-channel 6-axis gyro -97dBm PWM (71Hz) 3.6V ~ 16V 51mm*28.3mm*14.5mm 15g
E-mail: sales@dynam-rc.cn
Shop: https://www.dynamrc.com
Documents / Resources
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Tech DCTRUM SR86A 8 Channel 2.4GHz Receiver [pdf] Instruction Manual SR86A 8 Channel 2.4GHz Receiver, SR86A, 8 Channel 2.4GHz Receiver, 2.4GHz Receiver, Receiver |