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Review: DIY Air Data Computer Asgard and Pitot-Static on SkyEye RC Model
Pictures, Assembly, Getting Started, Breadboard, Project Progress Page, DIY Resources, So what’s next?
An air data computer (ADC) is an essential avionics component found in modern aircraft. This unit can determine True Airspeed, Mach number, Altitude, and common air properties from a pitot-static probe data and an outside air temperature probe.
This repository, together with the media published on the BasicAirData website, contains the information to build from scratch a recreational grade DIY Air Data Computer. This device can transmit data via USB serial port and Bluetooth, and log all data on a MicroSD.
This Air Data Computer can be controlled sending plain text messages from any serial / Bluetooth terminal.We are developing Air Data Bridge, a simple app for Android devices to connect via Bluetooth and use this ADC on-the-field in an easy way.
Reference ConfigurationSince it is possible to change some characteristic of the unit selecting different hardware, we propose a reference configuration. The reference configuration will have the following characteristics (complete hardware). This unit can determine True Airspeed, Mach number, Altitude, and common air properties from a pitot-static probe data and an outside air temperature probe.
Overall weight: 47 grams
Overall dimensions: Without push in fittings 66x41x24 mm; With push-in fittings 81x41x24 mm. Fixing tabs dimensions are equal to those of a standard servo
Assembly time: About 1.5 hours
Overall cost: 160 Eur (June 2017)
Power and Supply Current: Power to the ADC is supplied through a standard micro USB port, the same can be used to transfer data. Typical power source is a cell phone power bank
Ratings: Maximum measurable IAS @ standard conditions 382.06 km/h. Raw sensor Range (-1,+1) Psi. Sample speed 50 Hz (user selectable). Altitude, ISA (<4000, ) MSL. Raw sensor Range (0, 160000) Pa. Sample speed 50 Hz (user selectable).
Bluetooth: Present, usable with custom library to interact with an Android phone
Micro SD Card Reader: Present, micro SD Card 4GB
Temperature measurement: Present, uncalibrated typical 2 deg accuracy
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