Absolute Angle of Attack: True Lift, Total Safety
Angle of Attack (AoA) is critical for maintaining safe flight, but most traditional indicators are limited to fixed-point stall warnings. The Absolute AoA System solves this by using an advanced, precise normalized pressure ratio method. This technique, widely recognized as superior, provides a true, linear total lift gauge across all phases of flight.
Unlike conventional pressure differential systems that rapidly lose accuracy outside of stall conditions, the Absolute AoA System ensures dependable, precise readings regardless of density altitude, aircraft loading, or flap settings. This means you get accurate AoA indications for critical performance speeds, including Vx, Vy, and Best Glide.
By providing a precise performance instrument, the Absolute AoA eliminates the need for useless speed memory drills. You can truly fly the wing, not the speed.
Advanced Technology & Pilot Focus
The system is designed as a powerful Single Pilot Resource Management (SRM) tool to reduce workload and enhance safety:
Multi-Sensor Pressure System
Utilizes four airflow ports with multiple pressure sensors for accurate AoA readings in all flight phases
Flap Position Auto-Detection
LiDAR technology detects flap position without physical connections to the flap system.
Highlights of the Absolute AoA System
Easy Installation – Quick installation using WiFi/Bluetooth, no long tubes and minimal wiring or a wired version, typically completed in 3–4 hours using existing inspection panels.
Reliable Connectivity – Choose between WiFi (wireless) or a wired connection for sensor-to-processor communication.
Flexible Power Options – With wireless connection you can take power from your wing lights or navigation lights, reducing installation time.
AoA Display Options – Choose between the Absolute AoA 2.8-inch panel-mount and dash-mount IPS touch displays, both offering brilliant clarity, responsive control, and customizable AoA presentations for intuitive visual feedback. Our displays use TFT LCD IPS technology which operates on electric fields, not magnetic fields, unlike older display types. Moreover, our thick ABS plastic enclosure significantly minimizes magnetic signature. Magnetic fields from internal electronics and LED backlight are very low. To be most safe, you may maintain 6 to 12 inches of distance.
Dedicated HMI Calibration – A 6.5-inch digital HMI interface simplifies setup and AoA calibration. The HMI Phone is only required for setup and calibration.
Absolute AoA Probe – Designed for installation under the inspection plate. Made from high-quality 6061 aluminum, it’s built for precision and durability. As for probe icing, here are a few important details:
First, observe the shape of our probe and the opening for the air intake. The air intake channels have a significant slope, so water will not remain on them. Second, the anchoring screw hole in the forward position features a deep cavity. This can be used to install an appropriate heating element. Additionally, there is enough surface area to drill extra hole needed for most standard-sized heating elements. Please note that we do not supply heating elements as part of the kit.
Easy One-Point Calibration – Simplify Absolute AoA setup—press Start in cruise, Stop at stall warning. Precise data in just 3 minutes.
Custom Audio Tones - 400 Hz and 1600 Hz and pulse rates to clearly indicate different phases of flight, similar to Navy and Air Force standards.
Lift Reserve Display - Prominently shows Lift Reserve Remaining for immediate, visual feedback on the aerodynamic margin above stall.
Over-the-Air (OTA) Updates - Easily perform all future software updates and system enhancements wirelessly, to ensure the latest features and firmware.
Solution for Flap Position Sensing: The New AoA Flap Scanner Pod : To solve mounting challenges near the flap area—especially for twin-engine aircraft—we created the AoA Flap Scanner Pod —a durable, aircraft-quality aluminum housing that mounts separately from the main AOA probe—to overcome challenge of finding a suitable mounting location near the flap area for LiDAR flap position detection, now available as an optional add-on.
Features of the Absolute AoA System
Multi-Sensor Pressure System
Utilizes four airflow ports with multiple pressure sensors for accurate AoA readings in all flight phases
Flap Position Auto-Detection
LiDAR technology detects flap position without physical connections to the flap system.
Advanced Processor Integration
Sensor electronics mount directly above the inspection plate, with the processor installed behind the instrument panel.
True Normalized Pressure Ratio System
Provides highly accurate, non-linear AoA data unaffected by density altitude, loading conditions, or flap deployment.
Custom Audio Tones
The system includes 400 Hz and 1600 Hz frequencies and pulse rates to clearly indicate different phases of flight, such as approach and critical AOA warnings, similar to Navy and Air Force standards.
Over-the-Air (OTA) Updates
For effortless maintenance and future enhancements, the system supports Over-the-Air (OTA) updates. You can easily perform all future software updates and system enhancements wirelessly, ensuring your AOA system always runs the latest features and firmware.
Audio Annunciation Options
It provides critical information with both visual cues and customizable audio annunciation. You can select to hear either distinct tones, or clear human voice , or no audio.
400Hz intermittent tone begins at Best Glide. Hate displays; just follow the tones.Beyond Best Approach, a 1600Hz tone starts Fly the wing; like the Navy and Airforce not the speed numbers.
'Getting Slow' plays immediately after Best Approach, then 'Too Slow' as the aircraft gets closer to the beginning of aircraft’s built-in Stall warning you calibrated.
Choose the starting point for your intermittent tones from a convenient dropdown menu, tailoring alerts to your preference.
AoA Display Presentation Styles
The Absolute AoA System offers multiple presentation styles ¬ Chevron, Bar Meter, Sweep Needle, and Performance. Each provides precise, real-time visualization of your wing’s Lift Reserve (LR%) and calibrated angle of attack
Perfect for club planes or shared ownership, our software lets you switch instantly between any presentation style at any time. This flexibility means every pilot can select and fly with their preferred AoA Presentation, guaranteeing .Universal Lift, Zero Re-Learning across any aircraft.
There is no separate calibration required for each presentation style. We simply plot the same calibrated data onto the presentation you select.
Wired or Wireless Communication
Connect the sensor electronics to the processor via WiFi or a wired connection based on your preference.
Accurate Across All V-Speeds
Unlike pressure differential systems, the Absolute AoA System ensures linear and precise AoA indications beyond just stall warnings.
Customizable AoA Display
Choose between the 2.8-inch panel-mount and dash-mount IPS touch displays, ensuring brilliant clarity and responsive control. Adjusting display brightness is intuitive. Simply double-tap the screen and a slider appear. Drag up or down to ideal brightness. Each display includes necessary enclosures to ensure a professional fit; secure panel mount display using the supplied mounting bracket.
Easy One-Point Calibration
This dramatically simplifies setting your Absolute Angle of Attack (AoA). While cruising, press Start, and when you hear the stall warning, press Stop. Get precision AoA data in 3 minutes, with zero hassle.
Lift Reserve Display
The display prominently features the Lift Reserve Remaining, providing pilots with intuitive, immediate visual feedback on the aerodynamic margin above stall.
HMI
Manage all your preferences including AoA Presentations and audio options in the Absolute AoA software. This software run inside the Absolute AoA’s CPU box. Access this software using any device with a browser and of course from the included Holy Micro’s Human to Machine Interface device also known as HMI device. HMI is included in the Absolute AoA kit at no additional cost.
This HMI makes it easier to connect and manage all our current and future products from Holy Micro. Enter your basic aircraft data to calculate the important speed you need to fly for calibration.
AoA Display Presentation Modes
Absolute AoA offers two presentation modes – Standard Mode and Advanced Mode– giving you more flexibility in presenting AoA information.
Standard Mode is quick and easy with no flap detection or audio over Bluetooth etc and you have access to three presentation options - Chevron, Bar Meter, and Sweep Needle.
For the most comprehensive set up, select Advanced Mode. This unlocks 4 presentations, including Chevron, Bar Meter, Sweep Needle, AND Performance. You also enable Flap Detection, Bluetooth audio and more in Advance Mode.
To know more about the Absolute AoA display options and other details, please check our YouTube video here.
Click here to view the video
Solution for Flap Position Sensing: The New AoA Flap Scanner Pod
We heard the feedback from many owners, particularly those with twin-engine aircraft, regarding the challenge of finding a suitable mounting location near the flap area for LiDAR flap position detection.
To solve this mounting constraint, we have designed and developed a dedicated solution:
AoA Flap Scanner Pod
This is a separate sensor housing crafted from aircraft-quality aluminum that can be mounted away from the main AOA probe. This pod is specifically designed to overcome placement issues on complex wing configurations.
AoA Flap Scanner Pod is ready for purchase as an optional add-on.
