Description of the Sample Model Being Created:
- Motorized aircraft with a single electric motor and flaps, such as the Cessna 150
- Fixed landing gear with a steerable nose wheel
- Equipped with digital HV servos
- Functions: 2x ailerons, 2x flaps, 1x rudder, 1x elevator, 1x nose wheel steering
- Installed components: DUPLEX REX 10 receiver for the 2.4 GHz band, DUPLEX Rsat 900MHz NG satellite receiver for the 900 MHz band, MEZON EVO 80 BEC ESC
"New Model" Menu
- In the menu "Main Menu / Model / New Model", start the model creation wizard and enter the model name "Cessna 150".
- Select the model type "Fixed-Wing", confirm, and press "F5" to proceed to the next window of the wizard.
Warning: For safety reasons, never create multiple models with the same name.
Model Image and Colors
- To improve orientation, you can select a model image from the "Select Image" option in the menu.
Note: You can find a suitable image online or take a picture of your model. Supported formats: .png or .jpg, recommended size: less than 100 kB. Transfer the image to the transmitter’s "Img" directory (see section 9.1 of the transmitter manual).
- Choose the preferred "Color Profile" for the interface.
- Press "F5" to continue.
Basic Configuration
Wing type: "2FLAPS/2AIL" (model has two servos for flaps and two for ailerons)
Tail type: "Standard 1ELEV 1RUDD" (one servo for rudder and one for elevator)
Number of motors: 1
Brake flap servos: 0
Landing gear servos: 0
Use gyro: No
- Press "F5" to continue.
Note: The template does not include a function for nose wheel steering. These functions will be configured later.
Function Assignment
- The wizard displays the created functions and their assigned controls. Here, you can rename functions, adjust their control inputs, trims, and ranges.
- Press "F3" to enter a function name for nose wheel steering, e.g., "Wheel".
- Press "F5" to continue.
Note: Do not assign a control to the "Wheel" function yet; it will later be mixed with the rudder.
Servo Assignment
- The system assigns functions to receiver outputs and displays the result.
- If necessary, assignments can be manually adjusted.
- Press "F3" to optimize function assignments.
- Press "F5" to continue.
Save and Select Model?
- Press "F5" (Yes) to save the model to the transmitter's memory.
- The "Servo Calibration" and "Pair Receiver?" steps are skipped for now.
Binding the Receiver to the Transmitter
- In the transmitter menu, select the correct model, then turn off both the receiver and transmitter.
- Insert the binding jumper (included with the receiver) into the "Ext." port of the receiver.
- Connect power to the receiver.
- Turn on the transmitter and press "F5" to confirm the use of the connected receiver.
- Remove the binding jumper from the receiver.
Installing the 900MHz Receiver
Most Duplex transmitters operate on both 2.4GHz and 900MHz frequency bands. Using dual-band transmission significantly increases operational safety. We recommend enabling dual-band operation whenever possible.
Note: For DS-12, DC/DS-16II, DC/DS-24II transmitters, use Duplex Rsat 900NG. For other transmitters, use Duplex Rsat900.
Setup Instructions:
- In the transmitter menu "Main Menu / Model / Device explorer / REX10 / Alternative Pin Configuration", set receiver output "E1" to "EX Bus Input/Backup".
- Power off both the transmitter and receiver.
- Insert the binding jumper into the "Ext." port of the 900MHz satellite receiver.
- Connect "E1" of the satellite receiver to "E1" of the REX10 receiver.
- Turn on the transmitter and receiver.
- In "Main Menu / Advanced Settings / Wireless Module Trainer-Student", enable "Enable 900MHz Backup".
- Activate "900MHz Module Binding".
- Remove the binding jumper from the satellite receiver.
Verifying Dual-Band Operation:
- Press "F1" (antenna icon) in the "Wireless Module / Trainer-Student" menu.
- Select "Disable All Except 900MHz backup" and confirm.
- Verify that servos respond to inputs, confirming the 900MHz backup link is functional.
- Press "F1 (ESC)" to return to dual-band mode.
Warning: During each power-up, the transmitter performs a system check of all RF modules. If a malfunction is detected, the model activation will be prevented. This means that if you disconnect the satellite receiver for the 900MHz band, you have to also disable the "Enable 900MHz Backup" function in the transmitter menu.
Servo Calibration
This menu allows you to configure servo direction, travel limits, neutral positions, and movement delay. The upper section displays the current deflection of the selected function, while below it, the function name and its assigned receiver output channel number (in parentheses) are shown.
Warning: Always set the servo to its neutral (center) position before adjusting travel limits.
- Max/Min Travel: Defines the servo travel range at the extreme positions of the control input. This value can be exceeded due to mixing, dual rates, or trim settings.
- Max/Min Physical Limit: Sets an absolute servo travel limit that cannot be exceeded, regardless of other function settings.
- Up/Down Delay: Adjusts the transition time between extreme servo positions.
Note: For the Cessna 150 model, it is recommended to use the "Delay" function to slow down the deployment of the flaps.
Free Mixes
In the menu “Main Menu / Fine Tuning / Free Mixes”, you can create and configure function mixes that are not included in the model setup wizard. For example, earlier in the setup, the function “Steering” was created to control the nose wheel steering. In this menu, a mix is used to link the rudder control with the nose wheel servo.
- In the “Free Mixes” menu, press F2 (+) to create a new mix.
- Assign “Rudder” as the Master function and “Wheel” as the Slave function.
- Use the “Main Value” parameter to adjust the ratio between the rudder and nose wheel steering deflections.
- Setting a negative value will reverse the direction of the nose wheel deflection relative to the rudder input.
Aileron Differential
For aircraft with an asymmetric airfoil, it is recommended to set aileron differential—meaning less downward deflection and greater upward deflection of the ailerons. This function can be configured in the menu:
“Main Menu / Fine Tuning / Aileron Differential”.
Note: Pressing F1 (Sym.) allows separate adjustment of the left and right aileron deflections.
Voice Output
The transmitter allows assigning audible alerts to selected events and telemetry values. For this model, we will configure:
Battery Capacity Status Announcement
When the assigned switch is activated, the transmitter will announce the consumed capacity of the flight battery.
- In the “Main Menu / Timers & Sensors / Voice Output” menu, select the “Trigger switch” option and assign it to the desired switch.
- In the “Sensors & Variables” menu, enable the “Capacity” value in the Trigger column.
Alarms
For each model, you can configure alarms to notify you when certain predefined limits are reached. Below is an example of setting up an alarm for consumed battery capacity using the MEZON EVO ESC.
Battery Capacity Alarm
This alarm will notify you when the extracted energy from the flight battery reaches a predefined threshold.
- In “Main Menu / Timers & Sensors / Alarms”, press F2 (+) to create a new alarm.
- Under “Sensor / Telemetry”, select “MEZON EVO: Capacity” and confirm activation.
- The model uses a 5,000 mAh battery. If you want to retain at least 20% of its capacity, set the “Condition” to “X >” (greater than) and enter 4,000 mAh.
- In the “File” field, select a suitable voice alert from the list and confirm with F5 (OK).
Note: When entering high values, you can easily switch between units using the “Menu” button (x1, x10, x100, x1000).
Telemetry and Main Screen Setup
The Duplex system allows the recording and transmission of extensive telemetry data. Each user can select the most relevant information. With the MEZON EVO ESC, full battery and power telemetry is available, including consumed capacity, battery voltage, motor RPM, and more. Key telemetry data should be displayed on the main screen for easy monitoring.
Main Screen Setup
- In “Main Menu / Timers & Sensors / Displayed Telemetry”, press F3 (+) and select “System”, then choose “Model Image”.
- Confirm with F5 for an enlarged display.
- Using the same steps, press F3, select “Telemetry”, and choose “MEZON EVO: Capacity”.
- To utilize the remaining screen space, you can add additional telemetry data such as battery voltage and ESC temperature, displayed in a non-enlarged format (see section 2).
The startup screen for the Cessna 150 model will then be displayed as follows.