6-DoF rigid-body physics (RK4), a motor model, a mixer and a cascaded PID — fly it, or tune it and read the step response.
Mode
Drone
Keyboard: W/S pitch · A/D roll · ↑/↓ throttle · ←/→ yaw · Shift finer · R restart · C camera · Esc menu.
Gamepad: left stick throttle / yaw, right stick pitch / roll. Touch: the two on-screen sticks.