Uavp Fc-600

[bitusbates]

Hi,

I'm David from Barcelona (Spain).
I'm trying to ask some questions:
- First, I want that you see my UAVP video >>> http://www.youtube.com/watch?v=u2Er_V_H5jY
- The UAVP can fly and I managed to do an stationary and a translation flight, but when I try to descend it, it begin to destabilize; it makes oscillations and quickly,
I must put the throttle in up position. By the way, my T-REX 450 helicopter is more stable than this; but I bought it,
thinking that it would be more stable than my T-REX 450 helicopter. I bought it for do aerial photography, and it's diffucult as flies.

I attach the .auv file (UAVPSet Parameter File) and you will can advise some UAVPSet Parameter File, better than the mine.

Thank you very much !!! & Best Regards !!!

David Méndez aircraft23@gmail.com

P.D.: I've got a UAVP with the next hardware and 3.14 software:

- FC600 Frame 24x23 inches (61x58 cm) of Lipoly.de
- 1x Populated Black Wolferl-Board V3.1
- 1x PIC with 3.14 Firmware
- 3x Gyro Breakout Board - ADXRS300 - 300 degree/sec
- 1x Triple Axis Accelerometer Breakout - LIS3LV02DQ
- 1x Compass Module - HMC6352 Breakout
- 4x Motors AXI 2217/20 Gold Line
- 4x YGE-30i Quadrocopter Version
- 4x EPP 10x4,5 propellers
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Here are the EPA settings that I used in my Futaba 6EX (2.4Ghz):

Ch1- Normal mode, 90% / 90%
Ch2- Normal mode, 90% / 90%
Ch3- Reverse mode, 110% / 95%
Ch4- Reverse mode, 95% / 95%
Ch5- Normal mode, 75% / 75%
Ch6- Normal mode, 80% / 80%
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Here are my Dual Rates settings that I used:
Ch1- 50%
Ch2- 50%
Ch4- 65%
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Here are my Digital Trims Numbers:
Ch1 = +8
Ch2 = -76
Ch3 = 0
Ch4 = +52

[smh20502]

I hear quite a bit of wind there which may be an issue. You have 3 rotating wings which means that you have more area for the wind to act on. Don't know if that is the problem or just part of it.

descending issue. Maybe rotor wash is a contributing factor. remember you have 3 rotating wings producing quite a bit of turbulent air. Have you tried to descend at an angle, say 45deg?

[MadSmasher]

From what I can see the axis that destablizes might be set just a bit too sencitive for the gyro.

I can't tell you how to set it, but all I can say is decrease the sencitivity of the gyro on that axis.

[aero_k]

Descent in any rotorcraft can cause some instability and vibration as the aircraft passes through its own rotor wake. The gyros are probably trying to compensate for this, but the sensitivity is set too high, as MadSmasher said. Descending faster or at an angle might help, but I think you probably need to adjust your gyro.