The FlyONSPEED mission is to provide high-quality angle of attack, energy management and flight training resources to the Experimental Amateur Built community.
Angle of Attack and Energy Management
Start here to learn more about the ONSPEED concept and energy management and how to apply them when you fly.
What We've Learned: Technical Resources
This section contains a collection of downloadable technical papers that address angle of attack and cockpit warning systems. It also contains excerpts from the F-4 flight manual that explain the original F-4 AOA system, as well as the way fighter aircraft fly approach and landing using AOA references.
Van's RV Transition Training Resources
Downloadable training resources for the Van's RV community. This section includes academic briefings and the "RV Transition Syllabus," a collection of transition training resources for pilots and flight instructors. Information is available in pdf format for use on any device, and original Word and PowerPoint files are also available for folks that want to edit any of the materials.
How To Build an AOA Tone Generator
This section contains detailed information about circuit design and software for Gen 1 and Gen 2 Systems. Parts lists, assembly instructions, calibration and installation information are provided.
Our Collaborative Work Site at GitHub.Com
Visit our GitHub.com site for the latest versions of our software and hardware designs.
The FlyONSPEED Project
The FlyONSPEED team is a group of aviation professionals with experience in general aviation, airline and military flying. All of our volunteers are active members of the EAB community. Our pilots are former instructors at the USAF's Fighter Weapons School or experimental test pilots and active civilian flight instructors. They have extensive experience developing, testing and teaching aircraft handling techniques. All of our engineers are also pilots. All of our team members are volunteers--we do this work because we enjoy it and want to give something back to the aviation community. Our objective is to help reduce loss-of-control mishaps by merging lessons learned and best practices from all aviation communities (GA, airline and military) to benefit the EAB community. Our hardware designs, software and training resources are open source and available to anyone. FlyONSPEED.org is an IRS 501(c)3 non-profit, collaborative organization dedicated to public safety and we gladly accept donations to support our work. Donations are fully tax-deductible. We are always willing to collaborate with folks, organizations or manufacturers interested in our work.
The project was started by two retired Air Force aviators and an engineer who simply wanted to adapt a successful military AOA system to their personal airplanes. Initial efforts used the AOA signal from a commercial EFIS equipped with a coefficient of pressure AOA sensor. A small computer read the serial output from the EFIS and generated the aural AOA signal. The initial focus was simply to get the system working and demonstrate the utility of the tone. The hardware developed in this initial effort is called the "Gen 1" system.
After developing and beta testing the first generation ONSPEED system with a group of volunteers representing a cross-section of the the EAB community, we realized that we could do better. The biggest lesson learned was how critical calibration of any AOA system is, and how challenged a coefficient of pressure system can be to provide accurate, usable AOA information. Based on this experience and with the help of aerodynamicist Dr. David Rogers, Professor Emeritus at the United States Naval Academy, the FlyONSPEED team set out to develop a stand-alone AOA air data and attitude platform that was easy to install, calibrate and operate in any EAB airplane equipped with coefficient of pressure sensors. The system can accurately measure absolute AOA to within a 1/2 degree 40 times per second and provide an accurate, damped audio cue to the pilot at G onset rates of up to 4 G's per second. We call the new system "Gen 2."
In addition to accurately measuring AOA, capturing the power required curve for the airplane and making calibration simple; our biggest engineering challenge is damping a very accurate, "noisy" AOA signal. The aural logic is different than a visual display, and with proper filtering provides timely, accurate AOA under most conditions using just the differential pressure sensors on the motherboard. The attitude platform and static source also included on the Gen 2 board will allow future exploitation of those capabilities to improve filtering.