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Non-profit, open-source organization dedicated to providing high quality Angle of Attack and education resources to the Experimental Amateur Built Aviation Community to reduce LOC mishaps.

Listen to Your AOA
What is ONSPEED?
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Our Mission:  Loss-of-Control Risk Mitigation for General and Experimental Aviation

Listen to Your AOA, Energy, Yaw, G and Airspeed

Simple, intuitive tone cues that allow the pilot to hear key performance AOA's and energy state as well as providing outstanding progressive stall warning. ONSPEED AOA is used for approach and landing, maximum performance takeoff and optimum maneuvering (neutral energy, maximum sustained turn rate).  The aural logic simplifies energy management and helps the pilot maintain positive aircraft control.  If you have a stereo ICS or headset with bluetooth, the 3D audio feature "slews" the tone to follow the slip/skid ball, so you know if rudder input is required to coordinate flight without having to look in the cockpit.  The system also provides over-load (G) and airspeed warning.  You can hear the entire flight envelope.

Learn more about flying with the AOA tone on the ONSPEED 101 page.

Education Resources

Learn more about angle of attack and energy management, and how to apply that knowledge to improve your flying skills. For engineers, programmers and experimenters, our library also includes AOA and energy maneuverability technical information. 


The FlyONSPEED team also develops and maintains the "RV-Type Transition Syllabus," a collection of transition training resources for the Van's Aircraft community.


Hardware and Software

All of our work is open source. Anyone can download the software and hardware designs (including schematics, parts lists and instructions).  Our current hardware version is Generation Two, Version 3 or "Gen 2 V3" for short.  It is a "through hole" configuration using off the shelf components designed to be assembled by hobbyists and experimenters. Unfortunately, the processor used in this design was a victim of COVID and is no longer available. We are currently designing new "V4" hardware.  The system is completely stand-alone and features AOA with automatic calibration, and overload and airspeed warning systems that allow the pilot to listen to the entire flight envelope when maneuvering.   


Visit our GitHub site: for builder resources.

We are happy to collaborate and answer any questions.  We will work with any experimenter or manufacturer that is interested in adapting our aural logic, hardware and/or software; and always welcome qualified volunteers that want to join the project.  Use the Contact Us option at the bottom of each website page, email, join our forums and comment on our blogs, or write a guest blog!

ONSPEED System Overview Video

A 17 minute narrated power-point presentation that presents a detailed overview of the FlyONSPEED system.

Visit our Project Update Blog and Forum for Latest Discussion

Please check our blog for project updates and technical discussion.  Click on the "Project Updates" link at the top of this page.  The blog allows readers to comment, and since we are an open-source project; we are always looking for feed-back, collaboration and discussion.  Our forum section also allows for interchange of information and ideas, so don't hesitate to post or add to the blog discussion.  Also, if you would like to guest blog and comment on any of our work or your own experience experimenting; please drop us a line and we'll be happy to publish it.  Feel free to contribute to the project--there is substantial expertise in the EAB community, and we can all benefit when more of us participate by asking questions and offering expertise.  The FlyONSPEED team is constantly learning, often as a result of thoughtful folks helping us out!

Visit our YouTube Channel

Fly along with us during flight test!  Some videos are edited, in others, you can watch the sausage getting made, warts and all.  Other videos are designed for training and familiarization.

Visit our GitHub Page is an open-source organization.  Our hardware designs and software are available for down-load on our GitHub page.  We freely share our work and always welcome collaboration.

All-volunteer, All the Time! is an all-volunteer organization that operates organically.  That means we have lots of talented folks that contribute their time and skills to develop a world-class angle-of-attack cuing system that we think is a better way to fly airplanes.  Our operating budget consists of donations and grant money.  100% of our budget goes to hardware acquisition, internet and other expenses.  All flight test is funded out-of-pocket by volunteers.  All engineering is performed by volunteers.  We don't have established program milestones.  Our blog is our primary means for publishing progress or lack thereof.  We will always engage via e-mail, message, phone call, etc. to the extent we can, but we don't have tech support team per se.  We know the Arduino Integrated Development Environment is a challenge for folks not well versed in computers.  We ask your patience as we can't always respond quickly to queries.  We also ask your persistence, since we sometimes simply miss a message or a forum post.  No excuse!  As we move forward with new hardware, our goal for new software is simplicity--a system that is relatively easy to install, requires little or no user programming and simple user interfaces (including automatic calibration) that work with any smart phone.

Our strategic objective is to assist with a paradigm shift in the way we think about flying and how we teach general aviation pilots to fly, all with an eye toward ensuring the first step of every "stand-up" emergency procedures evaluation is second nature:  "Sir, first I'll maintain aircraft control."  Our objective is to provide simple, intuitive "how hard my wing is working" and "how much power do I need?" information to the pilot.  


FlyONSPEED is an all-volunteer organization of aviation and engineering professionals dedicated to providing accurate, easy to calibrate angle of attack/energy management information and ergonomic cuing to EAB pilots.  The organization is also dedicated to provide high-quality training and flight test resources to the EAB community.  All information is available via open-source for download.  We are always interested in collaborating with anyone interested in any of our projects!   FlyONSPEED, Incorporated is an IRS 501(c)3 non-profit organization dedicated to flight safety and research.  Donations are gladly accepted, always appreciated and fully-tax deductable.  100% of our operating budget is internet expenses,  hardware and software acquisition.   All flight test is funded out-of-pocket by volunteers.

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