User manual FUTABA MCR-4A

[. . . ] Installing the gyro sensor When mounting the gyro in a larger electric or . 50 through . 91 size nitro helicopter, we recommend using one 2mm Mounting Pad. Gyro Sensor 2mm Mounting Pad Gyro Mount TROUBLESHOOTING If you experience erratic gyro operation (drifting, not holding well or inconsistent pirouette rate), please follow the troubleshooting tips listed below. Always verify that your model's tail rotor control and drive system are working correctly. 3 GYRO SENSOR INSTALLATION 2. Electromagnetic interference could affect the gyro or tail rotor servo. Mount the gyro in a different location, away from the electronic speed control, servos and drive motor. [. . . ] If you are using a standard receiver, then the only two connections needed are Receiver Tail Rotor Channel MCR-4A [Rin] connection and Receiver Gain Channel MCR-4A [Gain] connection. To determine the appropriate receiver channels, please check your transmitter's instruction manual. If using a Futaba S. Bus receiver, then only one extension is needed between the S. Bus Receiver connection and the MCR-4A [SB] connection. If any other information is needed please see the "S. Bus Basic Setting" section of the MCR-4A Instruction Manual. 5 CONTROL BOX INSTALLATION Using wire mounts, wiring fixtures molded into the helicopter, or hook and loop material, route the extensions to the receiver. Ensure that the extensions leading to the receiver cannot become entangled in rotating components and make sure the extensions are not rubbing against metal or carbon fiber which may damage the wires. Once the power system is installed and connected, please move onto the next step to learn how to program the gyro. MCR-4A BASIC SETUP Turn your transmitter on and allow it to initialize. During the initialization of the gyro, the screen will show an animated helicopter. Once the screen changes to show status, the initialization is complete. 6 MENU STRUCTURE Push DATA +/­ key Push MODE +/­ key Max. revolution Home screen Engine runtime OLED display mode LED display mode Operation mode Gyro Basic Gyro Expert Governor Basic Governor Expert S. Bus Basic Push MODE +/­ key for 1 second From the home screen the mode [+] and [­] button will take you through the various status screens for the gyro or governor. It also displays basic options. 7 MENU STRUCTURE From the home screen the data [+] and [­] button will navigate the upper menus which include the Home screen, Gyro Basic, Governor Basic and S. Bus Basic menus. Once the menu you would like to enter is selected (for example Gyro Basic), simply press the mode [+] or [­] button to navigate the options. Install the servo arm screw. 13. 25 -16. 5 mm (Depending on T/R linkage geometry) Carefully hold the tail rotor pushrod ball link onto the servo arm and verify that the tail rotor operation matches the transmitter stick input. If necessary, reverse the operation direction within your transmitter. Press the mode [+] key until "GY. Dir Normal" is shown on the screen. Rotate the helicopter counter clockwise (or what would normally be left tail rotor) and ensure that the gyro compensates by adding right tail rotor. If the gyro compensates the incorrect direction, then press the data [+] or [­] key until the gyro compensates the correct direction. Gyro direction [default: Normal] The gyro compensation direction is changed by pushing the data + or ­ key. 11 TAIL ROTOR SERVO INSTALLATION WARNING Verify that the gyro compensates in the correct direction before flight. If the compensation direction is incorrect the model will pirouette uncontrollably, at a very high rate. Next we need to set the servo limits within the gyro to ensure the tail rotor servo does not travel too far, causing binding. While performing this step, simply hold the tail rotor pushrod link onto the tail rotor servo ball link to ensure nothing can bind and cause damage to the servo. From the home screen press the data [+] key until Gyro Basic is shown on the screen. Now press the mode [+] key until "Sv. Limit" is shown on the screen. Move the tail rotor stick slowly towards full left and full right while listening for servo binding. Press the data [+] or data [­] key to increase or decrease the servo travel limit. [. . . ] If the pirouette rate is too slow, then increase the tail rotor channel end point or dual rates within the transmitter. 13 FINISHING UP Ensure that all extensions and servo wires are attached and bundled within the helicopter and that everything is plugged in correctly. Before the test flight verify all settings and ensure that the gyro compensates the proper direction. Ensure that: the Transmitter and Receiver batteries are fully charged. the gyro wiring has some slack in it and all wires are clear of the main frame. [. . . ]