The Turnigy TGY-50090M 9g analog all Metal Gear Micro Servo is great for most all small to medium park fliers, micro planes and helis.
It is a very reliable analog micro servo offering good torque, high speed, excellent centering and features a strong gear train that is all metal geared.
Specs:
Weight: 14g
Size: 23.1mmx12.0mmx25.9mm
Torque: 1.6kg.cm (4.8v)2 kg.cm (6.0v)
Speed: 0.08 sec/60deg (4.8v)0.07 sec/deg (6.0v)
Voltage: 4.8-6.0v
Type: Analog Micro
Gear Train: Metal
Motor: Brushed
Ball Bearing: No
Lead Length: 240mm
Plug: JR/Futaba
Spline Count: 20