S3154 Digital Micro 1.5Kilo .1Sec @4.8V See S3777

This is the Futaba S3154 Digital High Torque, High Speed Micro Servo.
Ideal for electric planes and small electric helis(250-450 cyclic)!

Increased precision as it is Digital
Light weight, perfect for Micro helis
Nylon gears
 

One S3154 Digital Micro Servo
One .91" x .64" (23mm x 16mm) 4 arm servo horn (comes pre-installed)
One 1.33" x 1.33" (34mm x 34mm) 4 arm servo horn

Torque:        21 oz-in (1.5kg/cm) @ 4.8V
                      24 oz-in (1.7kg/cm) @ 6V
Speed:         0.10 sec/60° @ 4.8V
                      0.09 sec/60° @ 6V
Dimensions: .  09 x 0.4 x 0.8in (22 x 11 x 20mm)
Weight:             0.28oz (7.9g)
Lead Length:   6.5" (170mm)
Output Shaft Diameter: 4mm

Do not use S3154 servos with gas or high power engine models, large
gliders, or other models that require high torque
Using supply voltage higher than 6V or applying high load to the
servo will shorten the life.
Alway use the servo horn specially designed for this servo. Do not
use conventional servo horns.
Excessive force or shock to the servo horn may damage the ultra mini
precision gears inside the servo.