What kind of on-board stabilization are you using?
I'm a new member but I have been building a 4 motor tilt wing VTOL (think Osprey with 2 tilt shafts) for the last several months. It will hover at 50% throttle but is still not very pitch or roll stable. I have roll and pitch gyros (GWS PG-03) augmenting the throttle input for some of the motors but they tend to drift and once the VTOL drops one end or the other, the gyros don't recover completely.
So...I am wondering if anyone has corrected a similar stability problem using other gyros, accelerometers, or onboard microprocessors. Any advice / recomendations will be appreciated.