The FrSky Xact BLS6505H Brushless High-Voltage Servo is the flagship powerhouse of the Xact 6500 Series, delivering an incredible 74kg.cm of torque at 8.4V while maintaining exceptional precision and reliability. Designed for giant-scale aircraft, large aerobatic models, turbine jets, sailplanes and specialist applications, the BLS6505H combines advanced brushless motor technology with intelligent FBUS functionality.

Built around a fully CNC-machined aluminium case, hardened metal gears, dual ball bearings and a precision Hall sensor, the BLS6505H is engineered to withstand the demands of high-performance RC applications. Its brushless motor delivers outstanding efficiency, fast response times and exceptional holding power, making it ideal for large control surfaces and heavy-duty installations.

When used in FBUS mode, the servo provides advanced telemetry feedback including real-time current, voltage, temperature, status and rotation position data directly to compatible FrSky radios. The integrated Servo Winch function allows continuous clockwise or counter-clockwise rotation without requiring a separate winch controller, making it ideal for scale gliders, sailplanes and specialist winch applications.

Configurable settings including centre position, travel limits and winch operation can be adjusted directly through ETHOS-compatible radios or via the FrSky PC Servo Configuration Tool.

Key Features

Powerful brushless motor technology
Massive 74kg.cm torque output at 8.4V
High-voltage operation from 4.8V to 8.4V
Fully CNC-machined aluminium protective case
Heavy-duty metal gear train
Dual precision ball bearings
Precision Hall sensor technology
Supports FBUS, SBUS and PWM protocols
Real-time telemetry feedback via FBUS
Current, voltage, temperature and status monitoring
Rotation position indicator telemetry
Integrated servo winch functionality
No separate winch controller required
Compatible with Φ6 25T winch spools
Adjustable servo centre and travel settings
Firmware updatable for future enhancements

Perfect For

Giant Scale Aircraft
IMAC Competition Models
3D Aerobatic Aircraft
Large Scale Warbirds
Turbine Jets
Large EDF Jets
Scale Aircraft
Sailplanes & Gliders
Winch Applications
Tow Release Systems
Heavy-Duty Rudder Installations
Elevator & Aileron Control Surfaces
Specialist RC Projects

Product Summary

The FrSky Xact BLS6505H is an ultra-high torque brushless servo designed for the most demanding RC applications. Producing up to 74kg.cm torque at 8.4V, it combines a brushless motor, CNC aluminium construction, precision Hall sensor technology and advanced FBUS telemetry. The integrated Servo Winch function adds versatility for glider and specialist applications, making the BLS6505H one of the most capable servos in the FrSky range.

Specifications

• Model: BLS6505H
  
• Series: FrSky Xact 6500 Brushless
  
• Servo Type: High Voltage Digital Brushless Servo
  
• Motor Type: Brushless
  
• Gear Type: Metal Gear
  
• Sensor Type: Precision Hall Sensor
  
• Bearing Type: Dual Ball Bearings
  
• Operating Voltage Range: 4.8V – 8.4V
  
• Protocols: FBUS, SBUS, PWM
  
• Servo Horn Spline: Φ6 25T
  
• Refresh Rate: 1520μs/333Hz | 760μs/700Hz
  
• Firmware: Updatable

Dimensions & Weight

• Dimensions: 40 × 20 × 29.5mm
  
• Weight: 72.3g

Performance

• At 6.0V
  
  • Torque: 56.0kg.cm (777.7oz-in)
    
  • Speed: 0.18 sec/60°
    
• At 7.0V
  
  • Torque: 67.0kg.cm (930.5oz-in)
    
  • Speed: 0.15 sec/60°
    
• At 8.4V
  
  • Torque: 74.0kg.cm (1027.7oz-in)
    
  • Speed: 0.13 sec/60°
    
• Telemetry Functions (FBUS Mode)
  
• Current Monitoring
  
• Voltage Monitoring
  
• Temperature Monitoring
  
• Servo Status Feedback
  
• Rotation Position Indicator
  
• Servo Winch Functions (FBUS Mode)
  
• Continuous Rotation Operation
  
• Clockwise or Counter-Clockwise Rotation
  
• Adjustable Rotation Speed
  
• No Additional Winch Controller Required
  
• Compatible with Φ6 25T Winch Spools
  
• Winch accessories including spool, line and hook are sold separately.

Why Buy From Probuild Aircraft?

✅ Official UK FrSky stockist
✅ 100% genuine FrSky products
✅ Trusted by top international pilots
✅ Fast UK & worldwide shipping
✅ Expert RC aircraft technical support
✅ Trusted by pilots since 1993
✅ Specialist model aviation retailer
✅ Competitive UK pricing

In The Box

• FrSky Xact BLS6505H Brushless HV Servo
  
• Servo Arm Set
  
• Mounting Hardware