Graupner yaw problems

[Cgott]

I recently build my DJI F550 with stock ESC, Motors and 10" propellers, wookong M, x468 gimbal with GoPro H3, 2 2.2amp 11.1 3S batteries in parallel, Boscam 5.8 ghz FPV, and Futaba T8FG. Everything was OK, Fly nice, but with a lot of vibrations and some instability. Then I change the stock propellers by a 10x5 Graupner-E... It flew very stable without vibrations... But with a constantly yaw rotation to CCW... I try configure my transmitter with right trim... Apparently the Hexacopter flew better, but with a constant CCW turn resistance. Very hard to turn to CW... And sometimes loose control and the Hexacopter turns abruptly about 90o CCW.

I install the stock propellers and the yaw rotation gone, but vibrations come back!

Any comments are welcome!

 

[Dewster]

I don't think you should use your transmitter trim. Try adjusting your gains to see if that will stop or reduce the yaw. I had APC props and Graupners and my craft yawed on both. Adjusting the gains stopped the issue for my craft.

 

[Cgott]

Thanks a lot Dewster... I try with 120 and 180 in yaw... But the same result.
I'll try with Transmitter knob to change yaw value on the fly...

 

[bruce365]

Hi Cgott, Sounds to me like your props are fitted incorrectly or you have the wrong combination of props. Do you have graupner left hand and right hand props? 3 of each and are they fitted the right way round?
Regards - bruce

 

[Cgott]

Thanks Bruce... I have Graupner left and right props... And I check again the prop combination according the Wookong manual, but still having the same issue... Today I change the props position... (Obviously left propellers with left propellers and right with right) but exactly the same thing... Then, set gains to 250 250 190 150 and fly gets better... Stills more stable but when I try to turn CW, is slower than CCW... When the battery drops to first alert the Craft turns to CCW and is very hard to control it.

 

[stanleyy]

I had similar issues on my Tarot FY680 during maiden flight. It was very stable, but it was heavily rotating counter clockwise. I was really desperate... Then I came home, clicked "use defaults" in Naza assistant (the last page, where you can load/save settings), set again all gains, did compass calibration and the problem was gone!Maybe this was different problem, but I guess it is worth trying...

 

[OneStopRC]

I used to have slight yaw on mine also, but mine was with DJI props. Turns out my props was on incorrectly, I used this to make sure they was correctly set and the motors turned the right way.

Note, this is looking from behind and above the Hex. M1 is your Right Front.

 

[Cgott]

Thanks stanleyy and deanot...
I double check the propellers position/direction... And everything is according these diagram... MI,M3, M5 CCW... And M2,M4,M6 turns CW... With DJI props Fly without yaw problems... But using Graupner yaw problem appears... I reset the Wookong and start again all the configuration... Now with 230 230 200 130/150 150... And did compass calibration just like stanleyy said. The craft fly much better... But turns CW remains hard...

The problem appear aleatory... Sometimes turns CW without problem... Then I thing that one ESC or motor is damaged.

Even more... I burn out a Gimbal's servo when resetting Wookong setting because I forget unplug it from main unit...
:black_eyed::upset:

 

[OneStopRC]

Wow, sorry to hear that.... you could try to move a suspect esc/motor to another position and see if you get the same thing. I would also be inclined to check the pitch on the props to eliminate a bad prop.... I could be very possible that it had something laying on it when in the store or shipping.... just a thought.

 

[Cgott]

Thanks deanot... I'll keep trying get more stable fly... Or I'll change motors and ESC.

 

[schoem]

Sorry for reviving this old thread, but I just found it on Google, and I happen to have the very same problem with my quadcopter and Graupner e-Props 10x5.
My quad is always yawing CW, when I pitch forward, also about 90° and has a hard time yawing CCW.
I've tried the suggestions, but nothing really helped.

Cgott, have you actually resolved this, or has anyone else had this problem?

 

[Cgott]

Sorry for reviving this old thread, but I just found it on Google, and I happen to have the very same problem with my quadcopter and Graupner e-Props 10x5.
My quad is always yawing CW, when I pitch forward, also about 90° and has a hard time yawing CCW.
I've tried the suggestions, but nothing really helped.

Cgott, have you actually resolved this, or has anyone else had this problem?

Actually I change almost all my F550, with different arms, motors and propellers... in fact, these problem never was solve... on these configuration... now, I have installed Androix aluminium ams, 3110-KV700 T-Motors, and APC 12x4.5 composite propellers... obviously the yaw problem was resolved, It was a very drastic solution, but now I have a very stable, heavy load, and different than f550 stuff.

I learn some important things on the way to get a useful and comfortable flying device... the second one (the first one is to be absolutely sure to have all well connected and installed) to get a nice fly, you have to get the correct combination of battery-propellers... months ago, when I change motors, arms, batteries and props, I still having exactly the same yaw issue!!! I try with a lot of kind of propellers... DJI, Gemfan, Graupner, Maytech and different sizes... until I get APC props... I don't now if APC are good stuff, even more, I read on some forums that 12" propellers are not recommended.... but... it works for me...

Another thing... try with different kind of batteries... I don't know what kind of batteries you have, but I you have 3s, try with 4s... or vice versa.

Actually, I use both of them on the same device... (not at the same time of course) when I use 3s the fly are very softly with almost no-vibration , but dangerous because its on the lower voltage limit. When I use 4s, the device is very responsive, wind resistant, fast... but a very nervous. I use different voltage batteries with the same gains.

I recently build a new f450 quadrocopter... this week I receive a new kit of Graupner 10x5 propellers... I will install it this weekend... then I´ll comment you on monday how was my fly...

 

[schoem]

Wow, thanks a lot, Cgott.I appreciate your effort in answering my post very much.
I'm very excited to hear what you have to say about the Graupner eprops on Monday.


The main thing I could do, indeed, would be to change batteries.
At the moment I'm flying 3S. I'll try it with 4S, but then I have to remove all my FPV gear beforehand, as it can only take 12 V.
I'll let you know how that turns out.


Again, thanks a lot!