The sensing, state estimation and aircraft integration live in a dedicated Flight Data Computer. The iPad does what it does best: a bright, familiar display.
Synthetic vision
A 3D view of the terrain ahead, drawn behind the attitude display, with runways, taxiways and aprons in place. Choose terrain-clearance colouring, satellite imagery or a hybrid of both. Terrain and airport data live on the iPad, so terrain works with no internet.
Primary flight display on the iPad
Attitude, airspeed and altitude tapes, heading and vertical speed on a bright, high-resolution native iPad app. Not a web page and not a remote screen: a real instrument on hardware you already know.
Custom Flight Data Computer
Purpose-built hardware running custom firmware and a custom extended Kalman filter for attitude and air data. Triple-redundant inertial sensors and dual barometers are continuously cross-checked, so a failing sensor is voted out instead of reaching your display.
Radio voice-to-text
Radio calls are transcribed live on the iPad as you hear them, so a missed clearance is there to read back. Speech recognition runs on the device, with no internet needed.
Transcription runs in the app today. The audio link from the radio is in development.
Com radio on the screen
Integrates with the MGL V16 com radio over CAN. Tune frequencies and see radio status right on the iPad.
Moving map
A satellite or hybrid map that follows the aircraft, with airport layouts drawn in. Track-up or north-up.
GPS heading, no magnetometer
Two GPS receivers measure heading from the baseline between their antennas. There is no magnetometer to calibrate, and no interference from the engine or wiring.
Works with your EFB
Standard GDL90 over WiFi feeds your EFB with no extra software, including attitude into OzRunways via the AHRS extension. Your charts and these instruments, side by side.
High-speed CAN bus network
GPS and airspeed sensors connect over a high-speed CAN bus network. Fewer wires, sensors mounted where they belong, and a network built to grow with your panel.
QNH altimetry with METAR
Altitude is QNH-aware throughout. When the iPad has internet, it fetches the local QNH from the nearest METAR automatically.
SouthPAN SBAS
The GPS receivers use SouthPAN satellite-based augmentation for better accuracy across Australia and New Zealand.
Lifetime clock
A power-on hours counter that survives power loss, shown on the display.
One box, one stream, every screen
The Flight Data Computer sends a single GDL90 stream over WiFi. The native app and your EFB both read it, so there is nothing extra to install on the EFB side.
SensorsGPS and airspeed on a high-speed CAN bus
Flight Data ComputerCustom firmware, custom EKF, redundant sensors
GDL90 over WiFiOne stream for every display
iPad + your EFBNative display app, OzRunways and other GDL90 apps
Built by a builder
Gardner Avionics is Kyle Gardner's company, and Crux EFIS is being built for Kyle's own homebuilt aircraft. It is designed by a builder who wants the same things from a panel that you do: clear instruments, honest engineering and hardware that makes sense in an experimental aircraft.
Roadmap
What's coming
These are on the roadmap. None of them is part of the product today.
In development
AI copilot
AI features that read Flight Data Computer data on the iPad: a voice copilot, engine-anomaly detection and a flight advisor.
In development
Autopilot
Heading and altitude targets set on the iPad, flown through MGL servos. The on-screen autopilot panel is built; the servo drive is not yet.
In development
Flight recorder
Every piece of flight data recorded on the iPad, with replay after the flight.
In development
Alerts in your headset
Audio alerts and voice callouts from the iPad played through the intercom.
Planned
Engine monitoring
Engine data from an MGL RDAC on the iPad.
Planned
ADS-B traffic
Nearby traffic shown on the display.
Planned
Weather overlay
Weather layered over the map.
Planned
Angle of attack
Angle of attack from a second airspeed and static sensor.
Planned
Electronic circuit breakers
MGL ECB circuit-breaker control from the iPad.
Planned
Thermal camera
A live thermal or infrared camera feed on the iPad, for night and haze.
Planned
Live checklists
Interactive checklists on the display.
Planned
Aircraft profiles
Display setups saved per aircraft.
Planned
iPad heat watch
Watches the iPad's temperature and battery on a hot glareshield, and eases the graphics load before it overheats.
From the workshop
Recent engineering milestones, drawn straight from the development history.
Commits
93
Automated test suites
22
Last update
6 Nov 2026
In development since 10 Aug 2026.
Rebrand to Gardner Avionics EFIS: app icon, lockup, display name
Send magnetic variation in EFIS_NAV from an on-board WMM2025 model