A quadcopter with a real flight model: four rotors with spool-up lag,
body-axis aerodynamic drag, gyroscopic coupling, blade inflow, ground
effect, wind and a lithium pack that sags under load.
Sticks
WSThrottle
ADYaw left / right
↑↓Pitch forward / back
←→Roll left / right
A gamepad is picked up automatically, Mode 2.
Commands
SpaceArm / disarm
MCycle flight mode
CCycle camera
HReturn to home
LAuto land
GStart / stop the course
RReset on the pad
PPause
First flight
Press Space to arm — the throttle must be at idle.
Hold W to lift off. In Angle mode the aircraft levels itself when you let go of the sticks.
Switch to Altitude hold with M and the throttle becomes a climb-rate stick that holds height at centre.
Lost? H climbs over the terrain, flies home and lands on the pad.