FrSky Twin TW GR6 Receiver – Dual 2.4GHz Variometer Telemetry (6CH)

FrSky Twin TW GR6 Receiver – Dual 2.4GHz Variometer Telemetry System

The FrSky Twin TW GR6 is a dual-band 2.4GHz telemetry receiver featuring a built-in high-precision variometer sensor and 6 PWM channel outputs. Designed for advanced RC aircraft and gliders, it combines long-range signal reliability with real-time altitude and vertical speed telemetry.

Key Features

• Dual 2.4GHz TW protocol with simultaneous active-active signal redundancy
• Built-in high-precision variometer for altitude and climb rate telemetry
• 6 PWM channel outputs for standard servo connections
• SBUS output supporting 16CH / 24CH expansion
• FBUS and S.Port telemetry compatibility
• Long-range signal performance with enhanced reliability
• 4ms race mode with telemetry support
• Over-the-Air (OTA) firmware updates
• Black-box data logging capability

Built-In Variometer Telemetry

The integrated variometer provides real-time altitude and vertical speed data directly to your transmitter. This is especially useful for glider pilots, thermal flying, and any application where climb rate and altitude awareness are critical.

Dual 2.4GHz Active-Active Redundancy

Unlike traditional receiver redundancy systems, the TW protocol uses simultaneous dual-band transmission. Both RF paths are active at the same time, improving signal reliability and reducing the risk of signal loss during flight.

Specifications

• Channels: 6 PWM outputs
• Protocol: FrSky TW (Twin Dual 2.4GHz)
• Telemetry: Variometer (altitude & vertical speed)
• Outputs: PWM + SBUS (16CH / 24CH)
• Telemetry Ports: FBUS / S.Port / Inverted S.Port
• Update Method: OTA (Over-the-Air)
• Data Logging: Black-box function

What’s Included

• FrSky Twin TW GR6 Receiver
• Dual antennas

What You’ll Need

• FrSky Twin-compatible transmitter or RF module (TW mode)
• RC airplane or glider setup
• Servos and power system

Best Use Applications

• RC gliders and sailplanes (thermal flying)
• Scale aircraft requiring telemetry feedback
• Long-range RC airplane setups
• Pilots wanting real-time altitude and climb rate data

Why This Receiver Stands Out

The TW GR6 combines advanced telemetry with true dual-band redundancy. The built-in variometer eliminates the need for a separate sensor, simplifying installation while giving pilots critical flight data in real time.

What Is a Variometer?

A variometer is a sensor that measures changes in altitude, allowing pilots to see whether their aircraft is climbing or descending. In RC applications, it provides real-time vertical speed data (climb rate or sink rate) directly to your transmitter through telemetry.

Instead of just showing altitude, a variometer tells you how fast your aircraft is gaining or losing height. This is especially useful for detecting lift, thermals, or inefficient flight conditions.

Why It Matters for RC Aircraft

• Find thermals: Identify rising air to extend flight time (critical for gliders)
• Improve efficiency: Optimize climb rates and power usage
• Real-time feedback: Know instantly if your aircraft is gaining or losing altitude
• Safer flying: Avoid unexpected sink or loss of lift

What You See on Your Radio

• Altitude (current height)
• Vertical speed (climb or sink rate)
• Audio tones (beeps increase with climb rate on compatible radios)

Many FrSky transmitters support audio variometer feedback, where rising tones indicate lift and falling tones indicate sink—allowing pilots to “hear” air movement without looking at the screen.

Built-In vs External Variometers

• Built-in: Integrated into receivers like the FrSky TW GR6 for a clean, simple setup
• External: Separate sensors used when additional precision or placement flexibility is needed

Modeler’s Tip

If you're flying a glider or sailplane, enable variometer audio tones on your transmitter. This allows you to detect lift without looking down, making it much easier to stay in thermals and extend flight time.

Modeler’s Tip

For glider pilots, use the variometer audio feedback on your transmitter to detect lift and thermals. This feature can significantly improve flight time and performance.