Hey guys...I put together a 3DR quad (10" props, 850Kv motors) 2.9.1 firmware and after several catastrophic crashes I am sort of getting the hang of it.
This is my very first experience with anything R/C so I realize that most of the trouble that I'm experiencing is probably pilot error, but I seem to be forever chasing my quad around with the sticks. I started with a 4S 5000mah battery and started playing with tuning via CH6_RATE_KP. At first, I followed the guide and based on what I have read since I'm using a 4S I should need to tune down from the default (0.1450), but down doesn't really seem to help the wandering quad. If I tune it upwards, it seems to help - I still have to chase it around with the roll/pitch a bit, but it feels like I'm having fewer over-corrections with the rate_p sitting at around 0.2100. I am not seeing any oscillation, but I'm terrified to take it any higher.
Today's session was in very light winds. The quad seems to remain quite level. It does seem to yaw to the right a little. It also seems to have a tendency to descend quite a bit even with the throttle staying in the same position. The quad is equipped with a sonar and it seems to be working.
Today, I decided to try it with a 3S battery (2200mah) and am seeing almost identical results. I have to take rate_p quite a bit higher than the default before I start to feel like I have any control over it. Should I just keep increasing the rate_p or should I be looking for something else?
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Thanks everyone for the suggestions, I really appreciate the attempts at help. I've got it dialed in now to where it's pretty tight. Now that I have the confidence to take it a little higher it performs quite well once I get it out of its own rotor wash. This was done mostly via tuning and paying close attention to how the battery is centered.
Hi Will. This might be a long shot but take a look at this thread I started this morning. After i posted the pic, user Jim Kahl spotted that one of my props wasn't correct which led me to recognize that I had wired one of the motors the wrong way after my last crash but i had put a prop on it that allowed it to have lift. Your description of "chasing my quad around with the sticks" is very much what mine felt like. I know it's a long shot but hopefully it helps.
http://diydrones.com/forum/topics/arducopter-2-9-released?commentId...