
🚁 The KST BLS905X HV Brushless Tail Servo is a high-performance tail servo designed for fast response, strong holding power, and reliable centering. Featuring a brushless motor, metal gears, and a rigid aluminum case, it’s an excellent upgrade for pilots looking for a more locked-in and precise tail feel.
⚡ Built for modern high-voltage setups, the BLS905X delivers smooth, consistent tail control even under high loads. It’s well suited for demanding flight styles and higher headspeeds where tail authority really matters.
✨ Key Features
- 🔋 High-voltage capable (6.0–8.4V)
- ⚙️ Brushless motor for fast response and long service life
- 🧱 Aluminum case for durability and heat dissipation
- 🦾 Metal gears for strength under high tail loads
- 🎯 Fast, precise response for locked-in tail control
- 🔄 Dual ball bearings for smooth operation
- 🚀 Ideal for performance-focused helicopter setups
📊 Specifications
| Operating Voltage | 6.0V – 8.4V (HV) |
| Torque | 6 kg·cm @ 6.0V / 7 kg·cm @ 7.4V / 8 kg·cm @ 8.4V |
| Speed | 0.045s/60° @ 6.0V / 0.040s/60° @ 7.4V / 0.035s/60° @ 8.4V |
| Signal / Frequency | 760µs / 560Hz |
| Motor Type | Brushless |
| Gear Type | Metal |
| Bearings | Dual Ball Bearings |
| Case | Aluminum |
| Dimensions | Approx. 40.5 × 20 × 37 mm |
| Weight | Approx. 72 g |
✅ Recommended Use: High-performance tail servo for helicopters (550-700 class) requiring fast, precise tail control.