Thrust Issues

[dbutlerquad]

My friend helped me build my quad. Both built on the MWC X-mode Alien chassis, and both use the MT2213 935kv EMAX motors w/1045 props. Both also run a 3S 5000mah battery,the same exact brand.

The first, (his)Quad #1, I built using a MultiWii Pro 3.0, from whitespy, and hobbyking red 30A ESC's & deans connectors. The second, (mine)Quad #2, uses a Naza-M Lite w/Multistar 20A ESC's ... which were strangely within spec for the motor, and XT60 connectors. Both use a Turnigy 9x...

Quad #1 flies great. It has good balance, good thrust & throttle, and the battery life is reasonable... even with a gimbal and GoPro.

Quad #2 doesn't. It has ok throttle for about 5 minutes, then it can barely maintain altitude... and that's without a gimbal or GoPro.

I've adjusted and configured the throttle curve and gains on the Naza & 9x without much luck. Modes don't change the thrust level much either. My question. Since the quads are so similar in other areas, is it the Naza or 20A ESC's causing the issue? After some research, I have determined a 4S is probably the best option for the size & weight... but since the first quad flies so well with the 3S, even weighing a little more, I thought the second should too.

Ideas? Thanks!

 

[holtneil]

Hi mate does it start out ok then loose power, if yes then check the naza for the battery save menu its may be going into power reduce as it has hit the limit set in the software,you can set it to 3.5v a cell
If its not this then it could be the ESC can you give me a link the ESC may have the lipo save like the Naza
In the naza it comes under advanced then battery

 

[GJH105775]

If what Neil suggested does not work add some Links, you should have 5 amps more ESC than motor's max draw.

 

[holtneil]

George they only recommend a 15amp esc for the motor ,I think its the power save in the Naza

 

[GJH105775]

I did not think it was the ESCs, I think your right from what I could find online. The ESCs would probably burn out before causing a problem.

 

[holtneil]

Some ESCs have lipo protection and its in 3 stages off, low or high and this shuts power off to a landing

 

[dbutlerquad]

Here are my current settings, if I'm in the right place.
Advanced>Voltage
First level Protection
No Load 11.20v Loss.5 v Loaded 10.7v
Second Level Protection
No Load 11v Loss .5 v Loaded 10.5v
The only cell I can edit is the loss, and only up to 1 v.
Thanks for the reply

 

[dbutlerquad]

If I have an external low voltage alarm do I need to use the one in the Naza?

 

[holtneil]

no you can dis able it do this and try it see if it still plays up it will answer the question

 

[dbutlerquad]

I just flew it. Flew much better! Little windy, but I think you all may have solved my issue.
Ready for a calmer day.
Owe you guys!!!!

 

[holtneil]

Hi mate glad its working

 

[dbutlerquad]

When I rotate CW it will tick back CCW. This doesn't happen regularly and it only turns a small amount, probably less than 5 deg. Any ideas?
Thanks

 

[holtneil]

Hi mate do you mean tilt?

 

[dbutlerquad]

I think yaw is the terminology in the Naza software.

 

[holtneil]

Yaw is rotate did you say tilt when it yaws

 

[dbutlerquad]

when you rotate it CW, right after that it rotates a bit CCW

 

[holtneil]

That sound like stop gains there is Yaw gain in the basic set up on naza assist I never needed to play with them so try changing them just keep note of what they are now so you can go back if you need to , but I think when you test it needs to be in manual mode