Aircraft speed. Car-like freedom.

Join us

Next test

S1.4 · Hover test

Goal
Demonstrate a stable hover in The pilot commands how far the aircraft pitches or rolls, and how quickly it yaws. Release the pitch and roll controls, and it levels itself. The pilot still maintains altitude and corrects any drift. with S1.4, our 20%-scale winged prototype.
Target date
Sunday Sep 6th

Latest test

S1.4 · Hover hop · September 1, 2026

Goal
Demonstrate a stable hover in stabilized mode with S1.4, our 20%-scale winged prototype.
Outcome

We were testing simpler firmware, a new landing gear design and tilt mechanism design. It was unsuccessful and ended in a hard landing.

We want to share unsuccessful tests because showing our progress helps us move faster. And it’s more fun to share more of the journey.

Next
We’re validating yaw behavior in software-in-the-loop (SIL) and correcting any thrust asymmetries that may have contributed to the yaw issue. We’re also reinforcing the fuselage with composite layups, and adding damping to the landing gear.

Earlier tests

S1.4 · Hover hop · August 20, 2026

S1.4 lifted off, but the hover attempt was unsuccessful. We returned to ground testing before trying again.

S1.3 · Hover hop · August 6, 2026

S1.3 lifted off and hovered. The test ended in a light crash that damaged that airframe.

S1.2 · Stabilized maneuvering · July 16, 2026

S1.2 completed stabilized roll and pitch maneuvers in winds gusting up to 16 mph.

S1.2 · First hover · July 13, 2026

S1.2 completed its first hover, including liftoff, hover, and touchdown.

S1.1 · Hover attempt · June 26, 2026

S1.1 aircraft after its hover attempt S1.1 Hover attempt

S1.1, our first 20%-scale prototype, lifted off, but a control-software configuration issue drove half the motors higher as the aircraft tried to correct its yaw. We then iterated to S1.2, a hover-only airframe built to prove out hover faster.

Follow our testing

Watch new tests and get announcements for upcoming streams.