Futaba 8UHFS, 8UHPS - Manual (Page 50)

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The Flap Trim function is used to specify the amount of flap travel (or camber, if on a
sailplane setup). If flaperon (FLPRON) mixing is active, FLAPTRM is automatically turned
on. You should match the travel of both flaps before using this function to set the total
amount of flap throw. The amount depends on the model, but for sailplanes a small amount
(less than 10%) is preferred, since too much camber produces excessive drag. Don’t use
more than about 1/16” travel up or down (some airfoils, such as the RG-15, should be flown
with NO reflex).
Setting Flap Trim function
To AI-DIF function
To FLPRON function
Trim range of values
Range: -100 to +100%
Initially set to 0%
Flap travel adjustment
Adjust the flap travel with the
(+)/(-) keys.
Press the (+)/(-) keys
simultaneously to return to
0%.
Data input keys
These keys are used to move through the
two submenus in the FLPTRM function.
Turn the FLPTRM function ON or OFF by
pressing the (+) key ("ON" displayed ). Turn off
(INH) the function with the (-) key.
The differential function allows you to program the
amount of ‘up’ aileron travel independently from the
amount of down travel when you have two servos
plugged into the receiver (right aileron = CH1/AIL
and left aileron = CH7).
NOTE: Only one of the three functions aileron
differential, flaperon, or elevon can be used at a time.
The last function activated overrides the others. If
you need both flaperons and differential, activate the
FLPRON function and in its menu set different up
and down aileron travels to provide differential.
CH7
CH1
Setting up aileron differential in AI-DIF
To ABRAKE function
To FLPTRM function
Travel Range: -120 to +120%
Initially settings are 100%
Right aileron servo (CH1) travel
Move the aileron stick in both
directions and set the travel in each
direction with the (+)/(-) keys.
Left aileron servo (CH7) travel
Press the right (>) key and repeat
travel adjustment as done for CH1.
• Press the (+)/(-) keys
simultaneously to return to 0%.
Data input keys
These keys are used to move through the
three submenus in the AI-DIF function.
Turn the AI-DIF function ON by pressing the (+) key ("ON"
displayed ). Turn off (INH) the function with the (-) key.
Amount of servo
travel for left
stick motion Amount of servo
travel for right
stick motion