[NSRCA-discussion] Futaba S9155 Hi Torque servos

[Chad Northeast]

I am running them on ailerons and rudder with a 6V regulator powered 
from a 2s lipo.  Near 100 flights on them trouble free :)  Cant see why 
0.4V lower is going to make any difference at all.

Great servo.

Chad

ppennisi wrote:

>I am thinking of purchasing some of the new Futaba S9155 servos for rudder
>use on F3A models. Information taken from Tower's website state that it
>should only be used in 6 volt NiCad powered systems.
>
>Does anyone see any problems using this servo in a regulated 5.6 volt
>environment using a Duralite regulator and 2 cell 2350 mah Lithium Ion
>supply.  
>
>
>Here is the information taken from their site
>
>
>This is the Futaba S9155 Digital High Torque Metal Gear Servo.
>                           with J Connector.
>                      Designed for aircraft applications
>            This servo requires high-current draw from batteries.
>                         Use 6V NiCd batteries only.
>
>FEATURES: Coreless motor, see COMMENTS
>          Digitally enhanced microprocessors cut in half the response time
>            from transmitter input to servo reaction
>          Center of case is metal
>          One year warranty
>
>INCLUDES: One S9155 Digital High Torque Servo with J Connector
>          Round servo wheel 1.8" (45mm) diameter
>          Four point servo wheel 1.5" (38.5mm) diameter
>          Six point servo wheel 1.2" (32mm) diameter
>          Four rubber grommets
>          Four metal eyelets
>          Four 2x11mm mounting screws
>          3x8mm horn set screw
>
>SPECS:    Speed:        0.13 sec/60 deg @ 6.0V
>          Torque:       192 oz-in @ 6.0V
>          Length:       1.57"  (40mm)
>          Width:        0.79"  (20mm)
>          Height:       1.44"  (36mm)
>          Weight:       2.15oz (61g)
>          Power Supply: 6V required
>
>COMMENTS: S9155 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
>                 battery.
>
>         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 any AM transmitters
>including
>           the following Futaba models as the servo neutral signal is:
>1310us.
>           CONQUEST AM, FG Series (T4FG, T5FGK,T6FG, T6FGK, T7FGK), New
>Terra-
>           top, T3EGX, T3PGE, T2NL, T2LGX, T2FR, T2PK series.
>
>
>
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>  
>