This is the Futaba BLS256HV High Voltage High Speed Digital Heli Rudder Servo.

FEATURES: Designed for rudder control in Futaba high end gyros
          Brushless motor
          Handles up to 2S LiPo battery power
          One year limited warranty through Hobby Services beginning at date
            of purchase

INCLUDES: Futaba BLS256HV Servo
          0.83" (21mm) Diameter Round Horn
          1.8" (45mm) Diameter Round Horn
          1.6" (38.5mm) Diameter 4-Point Horn
          1.2" (32mm) Diameter 6-Point horn
          Mounting Hardware

REQUIRES: Installing in heli, connecting linkage and connecting to gyro

SPECS:    Speed: 0.055 sec/60° at 6.6V
                 0.050 sec/60° at 7.4V
          Torque: 61.1 oz/in (4.4 kg/cm) at 6.6V
                  69.5 oz/in (5.0 kg/cm) at 7.4V
          Pulse Width: 760µs
          Frequency: 270Hz
          Size: 1.57 x 0.79 x 1.45" (40 x 20 x 36.8mm)
          Weight: 2.15oz (61g)
          Power Supply: 6.0 - 7.4V DC

COMMENTS  The BLS256HV is designed only for gyro rudder control. Dead band is
            set as narrowly as possible. When the fuselage is static, the
            servo may jitter. This condition is normal.
          Very high current drain is normal at startup. Always use a 6V - 7.4V
            battery.

                                                                   jxs 05/27/11
                                                                         ir/jxs