This is the Futaba S9254 Digital Coreless High Torque,
High Speed Helicopter Gyro Servo with J Connector.
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.
FEATURES: Coreless motor for reduced weight and high-speed response
Digitally enhanced microprocessors cut the response time in half
from transmitter input to servo reaction
Dual ball bearing gear train
Dust and water resistant-not water proof
Black plastic case
One year warranty
INCLUDES: One S9254 Digital Coreless High Torque High Speed Helicopter Servo
One round servo wheel, one six arm servo horn, one four arm servo
horn, four grommets, four mounting screws and four rubber mounts.
SPECS: Speed: 0.06 sec/60° @ 4.8V
Torque: 47 oz-in @ 4.8V
Dimensions: 1.6 x 0.8 x 1.4" (40 x 20 x 37mm)
Weight: 1.7oz (49g)
Power Supply: 4.8V (Futaba does NOT recommend using 6V)
COMMENTS: S9254 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
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. A conventional servo motor has 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 servo is rated as high-torque for helicopter gyro applications,
the rating would not be considered high-torque for airplane control
surface or monster truck steering applications.
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 *****
***** Replacement servo horns are FUTM3551
***** The gear set for this servo is FUTM3445 (gear set S9253)*****
The servo case is FUTM3057.
Update EEW 3/17/04
updt jxs 11/01/04
updt jpg 07/13/05