Using a Parallax Propeller Jason Dorie built this Quadrotor. Watch the video below to see it in action. It looks to be very stable and with the Propeller processor on board there is sure to be no lack of processing power to keep things nice and stable.
“The control board is a Parallax Propeller protoboard (a quick prototyping board you can buy for about $20). The only sensor currently in use is a single 3-axis gyroscope (an ITG-3200). I have an ADXL-345 accelerometer mounted as well, but it’s not currently used.
Without batteries, it weighs 1kg (or 2lb, 4oz).”