We took a proven concept the aerospace world set aside seventy years ago and made it work — because the three things it always needed, modern batteries, modern control systems, and modern manufacturing, finally exist.
A conventional helicopter spins its rotor from the center. That forces a heavy transmission, a driveshaft, and a tail rotor whose only job is to cancel the torque the engine creates. Our aircraft drives the rotor from its tips instead. With thrust applied at the tips, there is no reaction torque to fight — so there is no tail rotor, no central transmission, and no central fuselage.
Tip-powered rotorcraft were built and flown in the 1950s. They were never practical then. What changed isn't the aerodynamics — it's everything around it: high-density batteries, precise electronic motor control, and flight computers fast enough to hold a delicate balance in real time. We found that balance through a combination of simulation and physical testing, and added our own refinements to make the concept excel at one thing in particular: lifting heavy loads.
A rotor's ability to lift is governed by disc loading — weight carried per unit of swept area. Lower disc loading means more lift for less power, and a gentler, more efficient downwash.
Here's the leverage: making the rotor bigger is mostly a one-dimensional increase in blade length, but swept area grows with the square of the radius. A little more length buys a lot more disc. That single geometric fact is why a large-diameter, tip-powered rotor is such an efficient heavy lifter.
We place the batteries out at the rotor tips. That does two jobs at once. It puts the power source right next to the motors that need it — no long, heavy runs of conductor to the center. And the mass at the tip dramatically increases centripetal force, which flattens the blade's coning angle. As the cone flattens, that centripetal force carries more of the load and offsets the lift, so the bending moment at the blade root practically disappears — and the blade root can be lighter. Less structure, more payload.
We drive the tips with propellers, not jets. Tip-jets are simple but thirsty; propellers are far more efficient, and efficiency is what turns a curiosity into a working heavy lifter.
Because each tip carries its own propeller, motor, and battery, the propulsion is fully distributed. There's no single point of failure at the center of the aircraft to lose.
Fuel-powered tip-rotors can claim longer range, and we expect to see them at the competition. But our high-efficiency large rotor sips power, so on the challenge's 5 nmi profile batteries are the best choice: cleaner, quieter, simpler, and more controllable. For missions that demand more range, the same airframe accepts a fuel-powered variant — so the platform scales with the customer's need rather than locking them in.
A tethered powered-lift test carrying a 95 lb payload — roughly 3× the aircraft's empty weight — in spin mode.
Two clean weight-bearing hovers — at 45 and 65 lb, on on-board telemetry — anchor our hover-power model, so the curve below is measured-in rather than simulated. The 5 nmi mission closes today at 4.3–4.9× the aircraft's empty weight, and 5× clears with 7–27% margin — with headroom to 5.2–6.0× as efficiency and mass improve.
A big, low-disc-loading rotor is a superb lifter. But with no payload it's sluggish: it can't reposition quickly, and a stiff headwind can pin it in place and keep it from completing a mission. Every large tip-rotor faces this. We expect other tip-powered aircraft at the competition — but we haven't seen one that solves the unloaded case as cleanly as this.
On the ground, the aircraft converts into a T-shaped tilt-wing airplane. The rotor stops spinning and becomes a fixed wing; the same tip propellers now pull it forward as a conventional aircraft at roughly 60 mph.
The result: it lifts like a large rotor when there's a load to move, and it flies like an airplane when it needs to cover ground empty or punch through wind. One airframe, two flight regimes, and no compromise forced on either.
Efficient, scalable vertical heavy lift opens doors that today's aircraft can't afford to. The heavy-lift drone is the first step.
Precision crop spraying, remote-area delivery in places like Alaska, and defense logistics — missions defined by moving real weight to hard-to-reach places.
Lift scales with rotor diameter, and range scales with the choice of battery or fuel — so one design language serves many payloads and ranges.
The same efficient-lift thinking points toward airborne wind energy — power generation aloft to help meet the enormous energy demand of AI data centers.
Designed with AI, engineered by a third-generation team of aircraft builders, and backed by Turner Systems. AI + Aerospace + Turner Systems = opportunity.