GFS-UAV N-01A - New improvements
Hovering test flights at 5 meters above
the ground
created on April 19, 2006 - JLN
Labs - April 19, 2006
Toutes les
informations et schémas sont publiés gratuitement ( opensource
) et sont destinés à un usage personnel et non commercial
All informations and
diagrams are published freely (opensource) and are
intended for a private use
and a non commercial use.
On April 18, 2006, I have conducted a new serie of test flights in a wide open space with the GFS-UAV N-01A.
The purpose of these flights test are to :
- Check the stability of the hovering at least at 5 meters above the ground.
- Check efficiency of the yaw control during a high speed vertical take off and a vertical landing phase.
Since the previous flight done on April 11, 2006, some improvements have done on the model.
- The gains of the piezo gyro which are in charge to control the roll and the pitch axis have been reduced so as to avoid the oscillations of the craft observed in the previous tests.
- The four curved flaps have been replaced by flat and rectilinear flaps to increase the efficiency of the control on the roll and the pitch axis (see the photo below).
- The gap between the blades and the streamlined body has been greatly reduced to increase the efficiency of the propeller.
- The Center Of Gravity (COG) has been moved upward, the Lipo battery has been put on the top and just below the hull.
The gap between the blades and the streamlined body have been
greatly reduced to increase the efficiency of the propeller.
The Center Of Gravity (COG) have been moved upward, the Lipo
battery have been put on the top and just below the hull.
The Lipo battery used is a PowerHouse (selected cells) 3S1P at
11.1V 950mA (rated for 25C)
Lipo pack weight : 96 g
At 5 meters above the ground, the hovering is very stable...
Click here
to download a video for Windows (WMV) (7.0 Mb)
Click
here to download a DivX video (AVI) (16 Mb)
Click
here to download a video for Quicktime (MPEG) (22.5 Mb)
Comments from Jean-Louis Naudin : These flights tests are very encouraging, I have been very surprised by the stability of the hovering at 5 meters above the ground. The yaw can be very easily controled by the pilot (myself) and the UAV is able to rotate on demand on its yaw axis while it do a stable hovering. The latest improvements have greatly contributed to these results.
This device can be an excellent VTOL UAV plateform to observe the surrounding...
For more informations, please contact Jean-Louis Naudin : JNaudin509@aol.com
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