[NSRCA-discussion] Futaba S9155 Hi Torque servos
Chad Northeast
chad at f3acanada.org
Tue Jul 11 04:53:38 AKDT 2006
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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>
>
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