From Separate Parts to Duo
A circuit on a workbench can prove that an individual idea works. A complete prototype has to prove that all those ideas can work together. In July 2026, the first integrated prototype of the FlySys Duo reached that point.
It brings together two barometric pressure sensors, an inertial measurement unit, our vertical-speed algorithms, audio feedback, Bluetooth Low Energy, battery operation, and the physical controls a pilot uses in the field.
This is the first Duo we can test as a complete flight instrument, not just as a collection of promising components.
Why Two Pressure Sensors?
Pressure is the foundation of a variometer's altitude and vertical movement estimate. Duo measures it with two independent barometric sensors and combines their readings when both are healthy.
The second sensor gives us another view of the same atmosphere. It lets us compare readings, identify disagreement during testing, and continue with the healthy sensor if one becomes unavailable. The aim is not to add complexity for its own sake, but to make the main measurement more dependable.
What the Prototype Lets Us Validate
The prototype is where measurements meet real use. We can examine how quickly the instrument responds, whether the tone remains stable, how the two pressure sensors agree, and how reliably data reaches the mobile application.
It also exposes interactions that isolated bench tests cannot: the effect of wireless activity on power consumption, the behaviour of the device during charging, the visibility of its indicators, and the way the enclosure influences everyday operation.
Each test produces something concrete to improve. Some changes are algorithmic, some belong in firmware or the mobile application, and others influence the next hardware revision.
A Prototype, Not the Finish Line
Reaching the first complete Duo is an important milestone, but it is not a finished production device. Calibration, repeated flights, power measurements, fault testing, and feedback from pilots still have to challenge every assumption we made at the workbench.
That process is exactly why the prototype exists. It turns the project from something we believe should work into something we can measure, fly, refine, and eventually trust.
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