A change in pressure reveals movement in the air.
Give your next climb a listen.
Sound preview · Customise pitch, climb repeat timing and active thresholds.
Clear audio feedback helps you follow the lift and focus on your flight.
Shape your climb and sink tones. Preview the sound, then send your tone curve to the FlySys Duo or save the profile for later use.
Dual barometers. One clear signal.
Dual core. Always on time.
Simplified. Easy to use.
Sensor architecture
Duo measures pressure with two independent barometers and combines their averaged signal with low-noise motion data at 100 Hz. Compare how a classic variometer, Duo’s two barometers and full sensor fusion respond to the same changing conditions.
See how dual sensors and IMU fusion reduce noise compared with a classic variometer. This continuous simulation uses measured noise patterns and the same generated movement in every view.
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.
Classic Baro
-1.69 m/s
Classic average
-0.20 m/s
Duo Baro 1
+0.32 m/s
Duo Baro 2
+0.66 m/s
Duo combined
+0.49 m/s
IMU-fused
+0.41 m/s
Battery autonomy
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 FlySys Duo 1050 mAh battery.
Choose where tones play
FlySys Duo plays the climb and sink tones.
Estimated autonomy
1 day 12 hours
Estimated with a full 1050 mAh battery
Bluetooth live data
Duo operates independently without Bluetooth streaming.
Higher rates update the phone more frequently and reduce autonomy.
20 samples/s
Estimates use measured Duo consumption and approximate sound/LED additions, with a full 1050 mAh battery. Actual autonomy varies with flight conditions, temperature, battery age and usable capacity.
Estimates use measured Duo consumption and approximate sound/LED additions. Actual autonomy varies with flight conditions, temperature, battery age and usable capacity.
Technical specifications
