I have several Naza's in different models and I cant see any evidence at all that the stab algorithm is different. They all fly the same and very well I would say. The key is getting the Calib. done right. It is quite amazing just how much lean from level can be set and it still levels itself on lift off. Try doing that with a 2.6 Ardupilot....
I don't even see any difference in the flight characteristics when I swop to a WKM FWIW. A few firmware versions ago I did notice a difference in the initial lift off but that seems to have been used on all of them now.
The one thing that worries me (besides the lack of direct support) with the NAZA systems is the Fly-Away issues that have been reported.
I had 2 such incedents almost happen to me... and I say almost because I was able to hard land the MR, and by that I mean it hit some bushes before it could escape my grasp, and the damage was minimal.
Worth Noting: I noticed something which I am certain is the cause of some of these reports.
I was twaeking my Phantom on a workbench and I had it armed but the motors hadn't been started yet. I was moving it about the bench (not supposed to move once powered up) and then after a while I armed it and ran up the motors. I began moving it around the bench some more to observe what would happen. Without powering down the TX or Phantom, I brought it to the garage to see how it would hover after the motion tests I had just put it through.
Well it didn't hover, in fact it made a B-line (on the ground) to the side of the garage and the wall stopped it. In the process I tried to kill the motors, but they wouldn't respond.
An Aha moment.
I powered everything down and brought the Phantom outside and whent through the normal power-up sequence and it flew just fine.
Another time I had the Phantom outside and I went through the power-up sequence as normal, but I had to wait for clearance and prior to getting it I moved the Phantom when turning on the camera. In flight I experienced the "almost" fly-away mentioned above.
Another time I had my Octo out and after a couple of successful flights, instead of powering down to reload my new batteries, I just swapped one out at a time, leaving the unit powered up. I may or may not have moved the octo in the process.
Once I took off it flew fine for a few minutes, and then some very erratic behavior ensued. It was windy and the octo was fighting for stability and suddenly it took a huge dip forward, loosing about 3' of altitude in the process. It happened again and again (because I needed to know what was happening and why, I didn't land).
I noticed that my M1 motor was stalling. For a split second the M1 motor would stop and start up again causing the erratic flight.
Upon landing I checked my amperage on that motor and found that it had spiked to 23.5 amps. That motor never pulled more than 18.5 amps before so this was a significant event.
I shut the system down and waited for about an hour then put it back up in the air, and after 15 or so flights, the problem never resurfaced.
My conclusion is that a) Naza No Like being moved on the ground... b) Naza No Like long periods of time between arming and initial motor start-up.
These tests were conducted under loose conditions and are not scientific, or to be construed as authoritative, bu they are observances that I think have merit.
I consider this a bit too erratic for my tastes so that coupled with the lack of support that I have received from DJI, I'm looking for more stable solutions.
I have read really good things about the XAircraft SuperX and have decided to put that in my current build, which is a 1200mm+ Heavy Lift Camera Platform.
I'll keep you posted
