Sensors and fusion
- Pressure sensing
- Two independent barometers
- Measured improvement
- 26% cleaner pressure input in a stationary one-minute test
- Motion sensing
- Low-noise 6-axis IMU
- Processing rate
- 100 Hz sensor fusion
FlySys paragliding variometer
Duo
We will help you find the core of the thermal.
FlySys Duo is a compact paragliding variometer and flying instrument. It provides real-time audio feedback based on gaining or losing altitude while broadcasting live vario and flight data to supported mobile applications. Pilots can fully configure the audio tone curve to match their flying style.
Sensor architecture
Fast, stable and reliable feedback
Duo measures pressure with two independent barometers and combines their averaged signal with low-noise motion data at 100 Hz. Explore the same recorded movement processed by the two barometers, the complete FlySys Duo sensor fusion, and a simulated conventional pressure-only variometer.
The same movement, processed three ways
This ten-second capture lets you see and hear the difference between the final FlySys Duo signal, its two barometers, and a simulated conventional pressure-only variometer. Every view uses the same recorded movement, making noise and response delay directly comparable.
FlySys Duo combines both barometers and then fuses their pressure signal with IMU data. The classic response remains visible in grey so its additional delay can be compared directly.
Duo Baro 1Duo Baro 2Duo combinedIMU-fusedClassic BaroClassic average
Duo Baro 1
+0.40 m/s
Duo Baro 2
-1.62 m/s
Duo combined
-0.61 m/s
IMU-fused
-0.20 m/s
Classic Baro
+2.34 m/s
Classic average
+0.22 m/s
Battery autonomy
Built for long flying days
Choose where your vario tones play, turn Bluetooth streaming on or off, and adjust the data rate, LED brightness and volume to see how each setup affects estimated flight time. The calculation uses the current 1500 mAh battery.
Choose where tones play
Estimated autonomy
2 days 8 hours
Estimated with a full 1500 mAh battery
Bluetooth live data
Duo operates independently without Bluetooth streaming.
Higher rates update the phone more frequently and reduce autonomy.
20 samples/s
1020304050 samples/s
50%
1%100%
75%
50%75%100%
Estimates use measured Duo consumption and approximate sound/LED additions. Actual autonomy varies with flight conditions, temperature, battery age and usable capacity.
Technical specifications
FlySys Duo at a glance
Processing and reliability
- Processor
- Dual-core microcontroller
- Workload separation
- Dedicated sensor-processing and communication cores
- Fusion recovery
- Automatic after unreliable motion data
- Pressure fallback
- Continues with one healthy barometer
Power and audio
- Battery autonomy
- 1500 mAh scenarios compared above
- Charging
- USB-C
- Power management
- Adaptive processing and sleep between measurements
- Audio
- Efficient piezo buzzer with customizable tones
Connectivity and control
- Wireless
- Bluetooth Low Energy
- Wired
- USB-C data connection
- Applications
- FlySys Mobile and FlySys Desktop
- Device access
- Optional Bluetooth password protection