The KST X15-855X mini tail servo is a great choice for helicopters ranging from 430mm-570mm rotor blade sizes, such as the Align T-Rex 500, Mikado Logo 480, MSH Protos 500, and SAB Goblin 570. Features with a brilliant 15kgf.cm torque and and extremely fast 0.05sec/60° speed at 8.4V with fantastic precision and reliability.
Additionally, these servos can be used in other RC applications where the physical dimensions and torque/speed ratings suit the needs of the RC application.

Features
- Support High Voltage 8.4V
- Extreme Torque and Excellent Speed
- Programmable
- Dual Ball Bearings
- Brushless DC Motor
- Hardened Steel Gears
- CNC Aluminium Case
Specification
- Item: X15-855X Tail Servo
- Rated Voltage: DC7.4V
- Voltage Range: DC6.0V-8.4V
- Torque: 10Kgf.cm@6.0V, 13Kgf.cm@7.4V, 15Kgf.cm@8.4V
- Speed: 0.07sec/60°@6.0V, 0.06sec/60°@7.4V, 0.05sec/60°@8.4V
- Working Frequency: 760μs/560Hz
- Temperature Range: -10℃……+65℃
- Case Material: Aluminum Alloy
- Motor Type: Brushless DC Motor
- Gear Set Material: Hardened Steel
- Position Sensor: Potentiometer
- Ball Bearing: 2BB
- Case Dimensions: 35.5mm*15mm*35.5mm±0.2mm
- Weight: 45g±10%