Absolute AoA System Introduced

Holy Micro!, creator of the SkyVoice Alert 500 and SkyVoice Glassy Guide 400, has introduced the FAA-approved Absolute AoA System.

The new system addresses the FAA’s SAIB 2024-07, which recommends all aircraft owners install Angle of Attack (AoA) systems, according to company officials.

Unlike traditional single-sensor differential pressure systems that are limited to near-stall warnings, the Absolute AoA system provides AoA information for climbing, cruising, and landing. It is unaffected by density altitude, weight, or loading, company officials noted.

The fully independent system utilizes multiple sensors to calculate and calibrate normalized pressure ratio — an accurate method proven through studies and flight tests to maintain precision across all phases of flight, company officials explain.

The system features a Flap Scanner with LiDAR (Light Detection and Ranging) technology, which automatically detects and adjusts for flap position and landing configuration.

Made from high-quality 6061 aluminum, the system is designed for installation under the inspection plate in smooth, undisturbed airflow. Installation usually takes three to four hours using existing inspection panels, company officials said.

The AoA Sensor Unit communicates with the AoA CPU Unit either via a wired connection or Wi-Fi, based on user preference. Flexible power options allow the system to draw power from wing lights or navigation lights.

To address mounting challenges near the flap area, particularly for twin-engine and complex-wing aircraft, Holy Micro has also introduced the optional Flap Scanner Pod. This separate sensor housing, crafted from aircraft-quality aluminum, can be mounted away from the main AoA probe and is available as an add-on purchase.

Pilots can choose either 2.8-inch panel or dash-mounted IPS touch displays. These feature the Lift Reserve Remaining, providing immediate visual feedback on the aerodynamic margin above stall.

A one-point calibration allows setup in three minutes. Pilots press Start in cruise and Stop at the stall warning.

The system provides either audio tones or voice announcements, based on user selection. Audio tones use 400 Hz and 1600 Hz frequencies with distinct pulse rates to indicate different phases of flight, aligned with Navy and Air Force standards, according to company officials. Alternatively, voice announcements such as “Getting Slow” and “Too Slow” can be enabled. Audio output is available via wired connection or Bluetooth, based on user preference.

Pilots can create custom labels on the Performance Presentation display, allowing them to easily mark and reference AoA corresponding to non-calibration speeds such as Vx and Vy. This eliminates the need to memorize additional performance points, improving situational awareness and reducing cockpit workload, company officials explain.

Price: $2,650.

For more information: HolyMicro.com