FUTABA 8UHPS Instruction Manual page 59

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The Throttle→Needle mixing function is used to control the engine's mixture using a 5-
point curve relative to throttle stick movement . The engine must be equipped with a
mixture control system, such as needle control or some other mixture adjustment, and the
needle servo must be plugged into CH8. The CH8 knob may be used for High-side mixture
adjustment when the idle-up (IDLE) function is ON.
You can have independent control of throttle→needle mixing in both the Normal
(NORM) and idle-up (IDLE) conditions. The TH→NDL function includes an 'acceleration'
function that precedes rapid throttle opening and provides the engine with the best mixture.
Setting Throttle→Needle Mixing
Top arrow indicates the
current stick position (2
arrows means it's
between points)
Curve Name
Curve Point
Display
Value
(NORM
(Range: 0 -
or IDLE)
+100%)
Move between the TH-NDL
NORM and IDLE screens
with the (↑)(↓) keys.
The blinking item on the
setting screen is the
current setting item.
Acceleration amount
Range: 0 to 100%
(Initial value: 0%)
→
Curve points 1-5
The bottom arrow shows the point on
the five-point curve currently being set.
1. Turn the TH-NDL function ON
by pressing the (+) key ("ON"
displayed). Turn off (INH) the
function with the (-) key.
2. Input 5-point curve values
Move the lower arrow to the
position you want to set with the
CURSOR keys (the curve point is
indicated by the arrow below the
numbers 1-5, and the current
throttle position is above the
numbers). Enter the desired curve
value with the (+)/(-) keys.
• If you're unhappy with what you've
set, you may return to the default
value by pressing the (+) and (-)
keys simultaneously.
Initial values:
POS1 = 0%
POS2 =25%
POS3 = 50%
POS4 = 75%
POS5 = 100%
3.Acceleration function setting
Enter the desired acceleration value with the (+)/(-) keys.Return to
a 0 % value by pressing the (+)/(-) keys simultaneously.
Acceleration is only mixed in when the throttle is moved towards
High. If Throttle Hold is activated, the needle servo moves and
acceleration is performed even though the throttle servo is fixed.
Idle-up functions are performed when the throttle curve idle-up
function is ACTivated.
To INVERT or
TH-NDL NORM
function
To TH-NDL or
GOVrpm function
56
These keys are used to
move around in the
TH-NDL function.
Data input keys