FlyONSPEED · 501(c)(3) since 2018
Reduce loss of control risk.
FlyONSPEED Gen3 is a panel-mount box that hears the wing's angle of attack and tones it through your headset. Open source, for experimental aircraft. First production run ships for AirVenture 2026.
01 — What it is
Stalls happen at an angle, not a speed.
OnSpeed measures the angle of your wing to the oncoming air and turns it into a tone you hear in your headset. A pilot who hears that angle in real time can land short, climb on the edge, glide farther, and fly an engine-out approach without guessing.
We've been building this since 2018. The firmware is open source, MIT. Training material is free. The third generation of hardware is in production now, with the first run shipping for AirVenture 2026.
The Navy adopted aural angle-of-attack for carrier landings in the late 1950s. Every modern U.S. fighter — F-15, F-16, F-18, F-22, F-35 — uses it as a primary control reference. General aviation has visual AOA from Dynon, Garmin, and others, mostly tuned for stall warning. What hasn't made it across is the audio cue across the full operational range — the way the military uses AOA day to day, eyes outside the airplane. Loss of control has remained the leading cause of GA fatalities at roughly 40 to 50 percent of fatal accidents since 1962. That's the piece we're bringing.
EAA Founder's Innovation Prize · 2018
Grand Champion · 2021
501(c)(3) · EIN 83-2140220
Open source · MIT
02 — Listen
What AOA hears that the pilot can't.
Skidding stall in the base turn at 800 feet AGL. Airspeed is nominal. Stick position, attitude, G-load — nominal. Zero buffet. The AOA tone is screaming the whole time. The departure is unrecoverable at that altitude. This is one of the most common loss-of-control mishaps in the GA pattern.
03 — Gen3
Gen3 ships for AirVenture 2026.
The FlyONSPEED Gen3 box is a panel-mount unit that plumbs into your pitot-static, reads the wing's angle of attack from three Honeywell pressure sensors, and tones the result through your headset across the full operational range — not just near stall. Includes a panel-mount indexer that shows the same tone visually for IFR or noisy environments. Logs flights to SD.
Works with Dynon, Garmin, MGL, GRT, VectorNav, and standalone. Tested in eight RV variants, a Sling LSA, a Sling 4 TSI, and a Harmon Rocket so far.
04 — Who
Volunteer pilots and engineers.
Mike "Vac" Vaccaro leads the project. Retired USAF lieutenant colonel, F-4 and F-15 pilot, Fighter Weapons School graduate and instructor. The rest of the team is a mix of military test pilots, working engineers, and CFIs. Everyone is a volunteer.
FlyONSPEED, Incorporated is a Florida 501(c)(3) nonprofit, EIN 83-2140220. Donations and eventual hardware sales fund the production runs. No salaries, no investors.
05 — Help
Three ways to help.
Install one.
If you're flying or about to fly an experimental aircraft, we'd like to put a Gen 3 in it. Tell us about your aircraft and we'll keep you in the loop.
Fly the tone.
Aural angle-of-attack is a different way to fly. Read the training pages, watch the videos, and learn what flying by tone actually feels like.
Donate.
FlyONSPEED is a 501(c)(3). Donations are tax-deductible and fund the production runs and flight test work.
FlyONSPEED
501(c)(3) nonprofit · EIN 83-2140220
1202 Windward Circle
Niceville, FL 32578