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Futaba - FUTM0214 FUTS9154 S9154 513886202216 4513886202216
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Futaba S9154 Digital High-Speed Aileron Servo
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Futaba S9154 Digital High-Speed Aileron Servo
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Tech Notes
This is the Futaba S9154 Digital Low Profile High Speed Aileron Servo
with J Connector.
Designed for aileron applications on model aircraft.

This servo can produce high-current draw from your batteries.
If using NiMH or LiPo batteries, make sure they are capable
of delivering sufficient amps.


Coreless motor
Digitally enhanced microprocessors cut in half the response time
from transmitter input to servo reaction
Dust and water resistant-not water proof
Low profile aero design is specially suited for wing installations
with thin airfoils
Nylon gears
Black plastic case
One year warranty


One S9154 Digital Low Profile High Speed Aileron Servo
One round servo wheel, one 6 arm servo horn
four grommets, four mounting screws and two rubber mounts.


Speed: 0.14 sec/60 @ 4.8V
Torque: 64 oz-in (4.6 kg/cm) @ 4.8V
Dimensions: 1.9 x 1.1 x 1.0" (48 x 27 x 25mm)
Weight: 1.9oz (53g)
Output Shaft Diameter: 8mm
Power Supply: 4.8V (Futaba does NOT recommend using 6V)


S9154 Digital Servo Precautions,
-It is best to avoid long leads and Y-harnesses especially with
standard grade wires. If problems are encountered, consider using
heavy duty wire such as Futaba's Heavy Duty Series or Hobbico's
Pro Series, minimizing lead lengths, and/or removing Y-harnesses.
-Current Drain: This digital servo is specially designed for high-
torque or high-speed, therefore very high current drain is normal
at startup. For ultimate performance when using this servo please
review the following points.
1. Radio systems with the Battery Fail Safe function have a
higher cut-off voltage setting which will cause shorter
operation time.
2. When installing the servo, please check pushrod linkage to
make sure there is no binding in order to prevent excessive
power consumption and decrease the life of the motor and

A note on Coreless motors: conventional servo motors have a steel
core armature wrapped with wire that spins inside the magnets. In
a Coreless design, the armature uses a thin wire mesh that forms a
cup that spins around the outside of the magnet eliminating the
heavy steel core. This design results in smoother operation and
faster response time.

This digital servo cannot be used with the following * AM *
transmitters as the servo neutral signal is: 1310us.
CONQUEST AM, FG Series (T4FG, T5FGK,T6FG, T6FGK, T7FGK), New Terratop,
T3EGX, T3PGE, T2NL, T2LGX, T2FR, T2PK series.

***** Otherwise they will work fine with current AM systems *****

No other arms will work on this servo, because of the unique
spline size.
JXS 2/16/04
updated JPG 3/2/04
updt jxs 11/01/04

– If you need more information, use these Futaba resources –
Web Site:
Phone: 217-398-8970
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