Real flight physics
A rigid-body model with motor lag, rotor drag, ground effect, a battery that sags under load, gusty wind, shelter behind buildings and a parcel that swings on its line.
Coming Soon
DroneSim
Fly the delivery. Learn the job. Run the depot.
DroneSim is a drone operations simulator that runs in a web browser. You can hand-fly a parcel quadcopter through a neighborhood, take scored lessons, plan deliveries that are checked before launch, and watch a depot dispatch several aircraft at once.
Chrome or Edge with WebGPU recommended; phone touch sticks are Early Alpha.
At a glance
400 Hz
fixed-step deterministic flight physics
820
passing automated tests at hand-over
16
scored lessons across two tracks
0.29 m
hover height error; 0.01 m drift with real autopilot firmware
6 aircraft
0 conflicts; 11.98 m closest approach in a fleet hour
1.1 MB
whole app before compression
Explore DroneSim
DroneSim models the whole job of a civil delivery drone, not just the flying. A quadcopter with a winch carries a parcel from a depot to a garden, lowers it on a line, releases it and comes home, through wind, near trees, wires and houses. The same simulation trains two kinds of people: a pilot flying by hand within sight, and a flight coordinator supervising automated deliveries and handling what goes wrong (a gust, a low battery, a lost link, a person standing on the delivery point).
A real autopilot
The built-in autopilot flies on simulated sensors in ArduCopter's modes and missions. Real ArduCopter firmware can replace it and has flown the same physics.
Talks to real ground stations
It speaks MAVLink, so QGroundControl connects like a real aircraft: modes, parameters, missions and telemetry. ArduPilot and QGroundControl were used only to verify compatibility.
Training with a debrief
Lessons set a standard, measure every attempt live and end with a scored debrief that says exactly what to fix. A portfolio demonstration, not certified training equipment.
Plans are checked before launch
The mission desk tests a route against airspace, obstacles, clearance and battery reserve, and refuses an unsafe plan leg by leg.
A depot, not just a drone
The dispatcher runs several aircraft against a stream of orders, keeps them apart by plan, re-plans when wind rises or a site closes, and reports on-time share and energy per delivery.
Fly it your way
Keyboard and mouse, a gamepad or a radio transmitter, with a quick-start guide for first-time visitors. Touch sticks for phones are in Early Alpha, not yet tested on real phones.
Built to be integrated
The simulation is a plain library that also runs on a server, and the app embeds in another page; deliveries, sites and airspace go in and out as standard data.
Your first flight
Take the controls from the opening flight. The app pauses to show a quick-start guide for your device.
| Action | Input |
|---|---|
| Motors on | Enter |
| Climb to 10 m | T |
| Move | Arrow keys |
| Climb and descend | W and S |
| Turn | A and D |
| Come home | 4 |
| Land | 5 |
| Reset after a crash | R |
| Quick-start guide | H |
Let go and the aircraft holds position. Gamepad and touch controls are shown in the app's guide for the device in use.
How it is built
- A custom WebGPU renderer written in TypeScript with no runtime libraries; every model, texture and sound is generated in code, so the whole app is about 1.1 MB.
- The simulation core is pure and deterministic, so the same code runs in the browser, on a server and in more than 800 automated tests.
- Flight, autopilot, protocols, world, training, fleet and rendering are separate modules joined by one small contract, so each can be replaced: the world can come from another host and the autopilot from real firmware.
- Built by an AI orchestration session directing AI coding agents, with every result reviewed and verified in a real browser and against real tools.
Development
Now
- A fictional delivery district with fields, hedgerows, gardens and furniture
- Hand flying, 16 lessons, mission desk, dispatcher, replay
- Real ArduCopter firmware and QGroundControl compatibility
- Keyboard, gamepad and radio; Early Alpha touch sticks
In development
- Real neighborhoods from a streamed 3D world
- More natural people and houses; clouds
- The six-rotor model flying under real firmware
- Touch controls tested on real phones
Requirements and controls
A browser with WebGPU (current Chrome or Edge recommended on desktop). Phones and tablets get touch sticks (Early Alpha, not yet tested on real phones).
Keyboard flight starts with the first-flight controls. Let go and the aircraft holds position. Gamepad and touch controls are shown in the app's guide for the device in use.
Credits
- No third-party art, models, textures, fonts, music or sound: all are generated in code.
- MAVLink message layouts are generated from the MAVLink project's definitions (MIT license for generated code).
- ArduPilot (GPL-3.0) and QGroundControl were used only as separate programs to verify compatibility; nothing from them is included.
Ready for your first delivery?
The flight build is coming soon to your browser.
Chrome or Edge with WebGPU recommended; phone touch sticks are Early Alpha.