NOTE: The instructions below were the original ones provided by RCG user MalcolmHolt, but have since been updated with the 4.1 firmware. You can download the new guide here, but the old instructions are left intact for historical purposes.
Very flexible servo speed control is available on the 8FG by using the Motor Function as the Master in almost any mix you choose. In this case, as Motor is not needed to operate a servo or ESC directly, it can be assigned to a virtual channel so will not tie up an active channel. The procedure for setting your flaps is as follows.
In the Function Menu assign MOTOR to any of the free virtual channels on screen 3/4. The throttle stick will be assigned by default as the control so change this to the three-position switch you want to use to control your flaps. I have used SG in the example.
In the Model Menu – Motor change INH to ACT on screen1/2. Do not set a switch. On screen 2/2 change speed from INH to ACT and change the four 0 In and Out speeds at the bottom to 21. (These determine the servo speed at each click of the switch and you can adjust them later to suit your needs).
Now set up a new Program Mix
On screen 2/2 change INH to ACT.
Set the MASTER to MOTOR and change its LINK from OFF to +. (This will allow the master to access its related speed control function).
Set the SLAVE to FLAP and change its LINK to +. (This will allow related functions such as the second flap or any elevator mix to operate automatically and with reduced speed when the switch is thrown).
Return to Screen 1/2 and set the movement to + 100 in both directions.
Check the servo monitor and the flaps should respond to the switch with reduced speed.
You may want to turn off the MOTOR WARNING in the LINKAGE MENU or it will annoy you every time you power up the transmitter.
You can adjust the mid position of the flap by changing the OFFSET on screen 1/2 of the Program Mix.
You can change the speed at which the flaps deploy and retract on screen 2/2 of the motor menu. You can set different speeds for each if you choose. (0 = no delay 27 = maximum delay)
You can also set up additional mixes at the same time. For example, set up a second Program Mix with MOTOR as the Master and AILERON as the SLAVE to give some crow (butterfly) braking (with slow servo) to aid spot landing when the flaps are lowered. (In this case you would need to set the SLAVE LINK to – as you need the second aileron to move in the opposite direction to normal).
(Courtesy RCG user MalcolmHolt)