Successful high altitude (>100m AGL) position hold tests flights with an optical flow sensor on a Tricopter (OFT) UAV.
1) Fast climb rate to about 100 m AGL in hold position mode with only the throttle command.
2) At 100 m AGL, a 360° turn has been done (wind 14 km/h from SE) with only the yaw command.
3) Fast descend from 100 m AGL whith the horizontal stabilisation active.
All the tests flights have been recorded with a GoPro HD Wide video camera
More infos at: http://diydrones.com/profile/JeanLouisNaudin