G+_Michael Heinz Posted May 14, 2015 Share Posted May 14, 2015 #quadcopter trigger warning... So, I swapped my 3x5030 props for 2x6030 props, it's going well, but I'd really like some advice on tuning my PI settings since I can't seem to get them right - In this 60 video you will since the quad "bounce" a lot in the air - is this because of (a) gusts of wind, (b) the "P" values are too high, © the "I" levels are too high or, (d) I'm a terrible pilot and I should just stop. Any and all advice welcomed... Link to comment Share on other sites More sharing options...
G+_Phorest Sherwood Posted May 15, 2015 Share Posted May 15, 2015 A- don't give up! B-I am going through the same, haven't found the answer yet, but I have a different FC (flip 32) and bigger motors. Once I get back into town, I'll be tweaking the p and I and share what I find. It's nice to see another noob that is going through the same stuff I am! Keep the faith! Link to comment Share on other sites More sharing options...
G+_Michael Heinz Posted May 15, 2015 Author Share Posted May 15, 2015 Thanks - I've looked into joining a local RC club, just to get some f2f time with experienced people, but everyone in the club is flying fixed wing planes. Link to comment Share on other sites More sharing options...
G+_Michael Heinz Posted May 15, 2015 Author Share Posted May 15, 2015 I know, right? They were weird. I mean, they're kind of like quadcopters but the propellers face forward and they never stop moving. Fast suckers, too. Link to comment Share on other sites More sharing options...
G+_Jason Marsh Posted May 15, 2015 Share Posted May 15, 2015 No obligatory quad selfie? First let me say that I don't know quads worth a squat, and certainly not the numbering conventions for propellers. I can't speak to the characteristics of your chosen props, I do know that the same concept applies to propellers of any use, regardless of the fluid they're moving. More blades generally means more "bite", at the cost of more drag. So, while going from 3 to 2 blades you'd likely go with a higher pitch, your energy expenditure for a given thrust will generally be lower, as you're cutting through the air with fewer blades. This is why drag boats, with need to accelerate very quickly even at the cost of losing some MPH on the top end, have 4- or 5-bladed props. Bass boats, which don't necessarily need to accelerate quickly, favor 3-bladed props for their lower parasitic drag and higher top end. This explains your %throttle change in going from 3 to 2 blade props. As for the stability, I remember Fr. Robert Ballecer, SJ going over his general procedure for tuning P and I in an episode of KH. When you watch that episode again you'll know what you need to do, I'm sure. After all, this is "Know How", right? Link to comment Share on other sites More sharing options...
G+_Michael Heinz Posted May 18, 2015 Author Share Posted May 18, 2015 Actually, I did go over Fr. Robert Ballecer, SJ 's procedure, first thing, but I see this wobble at even extremely low settings for the PID, low enough that I'm seeing very poor reaction to gusts of wind. Link to comment Share on other sites More sharing options...
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