Problem with take off

[JuniorZancan]

Hello guys, i need help with something. I've build a quad with the MultiWii PRO HK Board (the red one) with MegaPirate 3.0.1 R4, I calibrated everything, ESCs, accelerometer, compass and so on. Everything seems fine, but when I try to take off in the stabilize mode, this is what happens > http://www.youtube.com/watch?v=eDTBwmfeWeA. If I push the throttle up a little, regulate the Roll/Pitch and a lot of hard work, I can lift it up, but it doesn't stay in one place, it is going from left to right and so on.

Anyone can tell me what's going on? It's problem with the board or with the MegaPirate? How can I get a log?

PS: I'm using the Mission Planner 1.3.5. Sorry for my english, I'm from Brazil.

[JuniorZancan]

I got the telemetry log > https://drive.google.com/folderview?id=0Bw8KDvA6Mpy6enlVZHpVUUhUZ1U&usp=drive_web

[SirAlex]

Hi Try to recalibrate accel in Mission Planner. Do not increase Throttle long time by little steps. You must increase Throttle from 0% to ~40%( depends on quad hovering throttle) in 1sec.

[JuniorZancan]

Hi, I have recalibrated the accel, but I'm having trouble accelerating at once. I did it and it cost me 4 propellers rsrs, he lifted at once and turned backwards. After replacing the blades, I was accelerating and controlling with the Roll / Pitch, I could keep it stable for some time, but he was going down, then lifted again, even without touching the throttle. I tried to do the auto-trim, but not help much. What are the "symptoms" of the prop-wash in the barometer? And I'm not able to use the Yaw, when I turn left or right, he goes down, then turns and climbs. Here are the new logs telemetry > https://drive.google.com/folderview?id=0Bw8KDvA6Mpy6X2hyWkszdm1kRDQ&usp=drive_web

[sedafa]

Hello JuniorZancan can you resolve your problem? I have exactly the same problem. When I try to take off the quadcopter inclines in pitch angle. Always leans forward. The board is "Multiwii and Megapirate AIO Flight Controller w/FTDI (ATmega 2560) V2.0" from Hobbyking http://www.hobbyking.com/hobbyking/store/__657__501__Multi_Rotors_Parts-Flight_Controller.html And the firm 3.0.1 R4. I've tried everything. I also apologize for my English, I'm from Argentina

[JuniorZancan]

Hi sedafa. First of all, sorry for my english too, I'm from Brazil. Unfortunately, I caused some serious damage to my quadcopter. I lifted flight without proper calibrations and the quadcopter ended up on top of a tree. Fortunately I managed to rescue him, but with no propeller, no battery and no telemetry, (probably without the barometer too). I'm waiting to get the new parts (but as our customs in Brazil is example for the whole world, it will take a while). But before I do that little slip. I had managed to keep it stable for a while, using the auto-trim. On the internet you will find talking about it, but it was something about keeping the yaw to the right until arm up and continue holding until the lights blink intermittently. Then you fly with him and tries to keep it as stable as possible without turning sideways. After about 30 seconds, put down and disarm. After that it will be a bit more stable (at least mine was like that), but avoid changing anything in the center of his gravity, otherwise all this calibration was in vain.

After I did that, I was facing another problem (which was the main cause of my disaster). From what I imagine, I think he is accelerating much and ends up cutting the wind cycle (can not explain it better) and loses strength. Because it rises a bit and soon loses strength and falls and rises again only if I lower the throttle to zero and start again.

Because of that I could not use the RTL before I lose him that day, because he started to lose strength.

Thank you for contacting me. I'll keep you updated.