Corona DS633BP Digital Micro Servo

Fantastic little micro servos at a reasonable price of $6.68. This would be a great fit for the FireFly due to its low weight of 6.2 grams and torque of on a single cell lip battery 4.8v. The speed of the servo at .12sec travel to 60 degrees is great for slope gliding and gentle flying. For a more aerobatic maneuvers, a faster servo might be needed.
Model: DS633BP
Operating Voltage: 4.8V / 6.0V
Operating Speed: 0.12sec.60°/ 0.10sec.60°
Stall Torque: /
Size: 23.5×9.5×19.5mm
Weight: 6.2g
Dead Band: ≤5uSec
Gear: Plastic
Gear Type: Digital
Motor: Coreless
Connector wire: 215mm
Operating Temperature Range: -20°c ~ + 60°c
Spline count: 19