Hitec HS-81 Ball Bearing, Hi-Speed Servo. The HS-81 is among the most popular mini servos. Available in both resin and metal gear versions. With a fine balance between speed and torque, the HS-81’s were designed to be both economical and reliable. They are perfect for small electric aircraft as well as throttle servos on gas aircraft. By utilizing the standard size Hitec spline, any horn or arm that fits on a standard Hitec servo will fit on the HS-81.

Specifications:

• Speed:
• 4.8V: 0.11 sec/60 deg.
• 6.0V: 0.09 sec/60 deg.
• Torque:
• 4.8V: 36.1 oz/in
• 6.0V: 41.6 oz/in
• Weight: 16.6g (.58 oz)
• Length: 29.8mm (1.17")
• Width: 12mm (0.47")
• Height: 29.6mm (1.16")