this is the Futaba S9253 Digital High Speed Rudder F3C Servo for Gyro
with High-Current Wire Lead and "J" Connector Pre-Installed.
This servo can produce high-current draw from your batteries.
If using NiMH or Li-Po batteries, make sure they are capable
of delivering sufficient Amps.
FEATURES: Digitally enhanced microprocessors cut about 1/2 the response time
from transmitter input to servo reaction.
Dual ball bearings on the output shaft
Coreless motor with Plastic/nylon gear train
High speed
High current, high capacity wire lead with low resistance
Gold plated connectors
Case is made of black plastic
Dust and water resistant (Not waterproof)
Designed exclusively as a tail rotor servo for F3C, 30, 46 and 60
sized helicopters, particularly with SMM gyros such as GY401,
GY502. (Will Not work with the GY601 gyro.)
SPECS: Speed: .08 sec/60 degrees (based on 4.8V gyro rating)
Torque: 28 oz/in (2.0 kg-cm) (based on 4.8V gyro rating)
Weight: 1.7 oz (49 g)
Power Supply: 4.8V (Futaba does not recommend using 6V)
Length: 1.6" (41mm)
Width: .8" (20mm)
Height: 1.5" (38mm)