KST A12-S High-Speed Wing Servo
The KST A12-S is a premium wing servo engineered for maximum transit speed and precision. Designed for high-performance sailplanes and demanding aerobatic applications, it combines exceptional responsiveness with long-term durability.
Its hardened steel gear train ensures outstanding mechanical strength under high loads, while the CNC-machined aluminum case provides superior rigidity and heat dissipation. Thanks to its contactless Hall sensor position feedback system, the A12-S operates with minimal wear, delivering smooth, accurate centering and an extended service life compared to traditional potentiometer-based servos.
At Aerobertics, we particularly appreciate the A12-S for its perfect balance of speed, torque, and reliability—making it a top choice for pilots who refuse to compromise on control performance in competitive or high-end builds.
Technical Specifications
Operating Voltage: 6.0 – 8.4 V (HV compatible)
Torque:
- 11.0 kgf·cm @ 6.0 V
- 12.8 kgf·cm @ 7.4 V
- 13.5 kgf·cm @ 8.4 V
Transit Speed (60°):
- 0.11 s @ 6.0 V
- 0.09 s @ 7.4 V
- 0.08 s @ 8.4 V
Dimensions:
- Width: 12.0 mm
- Length: 30.0 mm
- Height: 35.5 mm
Weight:
Features
- Coreless motor technology
- Hardened steel gears
- Dual ball bearings (2BB)
- Digital electronics
- Contactless Hall sensor position feedback
- Programmable soft start
- Fully programmable (KST Tool #3 & #5)
- Frequency range: 1520 µs / 333 Hz (1000–2000 µs)
- 25T-6 spline output shaft
- Horizontal mounting tabs
- Not waterproof
Note: Always follow the model manufacturer’s servo specifications when selecting installation components.
