Had a chance to compare the Naza M to AMP 2 this weekend and wanted to share the experience.
The comparison was done on two similarly sized custom built quads at ~24" span running the same props, motors, PDU and ESCs. The Naza quad had a Go Pro and Fat Shark FPV 5.8Ghz Transmitter and weighted in at about 3.1 Lbs. The APM Quad (mine) had no additional equipment besides a Sonar and it weighed about 2.75 Lbs.
In general both performed very well with a nod going to the Naza in Loiter, RTL and auto landing due to what appears to be a better GPS. Clearly APM has auto mode and Naza does not.. for the price the APM appears to be a solid value.
As expected both quads were equally stable with no real noticeable difference in stability. The only big difference was NO TUNING on the Naza... it just worked out of the box.
The Naza quad had a noticeable difference in loiter stability and accuracy. Granted my quad my not be tuned perfectly but the Naza held its position more accurately and with less twitching in the wind to do so. The Naza's corrections to the wind seemed to be invisible.. where the APM corrections were noticeable in both pitch and prop noise.
We did a RTL comparison taking off from the same spot and flying about 100 yards away at about 35 feet. The Naza returned to the exact spot of take off. APM got within 10 feet (see below).
Testing the auto landing during RTL..... the Naza descended from 35 feet in what appeared to be about 5 foot increments. It was a very controlled decent. It landed perfectly on home and shutoff. As mentioned the APM quad hit the launch point within 10 feet. Its decent to landing was steadily and constant. When it touched down it then proceeded to skip around on the ground and went another 10 feet from its landing point before shutting down.
The Naza has no autopilot. I finally got all the gremlins out of my APM and flew several successful missions which was very cool.
APM is ~$200 with GPS and Autopilot
Naza is ~$240 + and additional ~$160 for GPS. = $400
Here is a video that shows where the Naza baro is found (not my video):
I think that little rectangle is an oscillator, and the big rectangle is the GPS chipset shield. A spoiler can reduce the 'bubble', but I don't think that's the problem. The APM2.5 baro with foam insulation is seeing stagnation pressure for the most part, just like Naza.
i think there are too many released for apm 2.5....the team should wait before to release a new version and try to fix all bugs
it s the reason why arducopter is not very famous like multiwii..in the begining of the project lots of people had not happy because nothing working really well
now the project seem to be better..but not enaught userfriendly!
i am very happy to see this project move on but i think we need to aim in the good way the development..less features but with better results for example
New version ArduCopter-2.9-rc1.
Where can i get this files compiled ready for upload to my APM 2.5 board?
You can't. If you are a developer and would like to TEST, get it from http://code.google.com/p/arducopter/downloads/list and upload via Arduino, etc. Have fun.
Walther: once it's thoroughly tested by the dev team, it will be released to the public via the Mission Planner, as usual. Probably in the next couple weeks.
I gave myself a crash course in Arduino this evening, and compiled an AC2.9rc1 hex file (605kB). I uncommented the APM2 hardware line in APM_Config.h, and left the source otherwise untouched. Can I simply flash the file to my APM2.5 with the latest MP and USB, then configure/tune the rest of my parameters through MP as usual? ...or am I asking to brick my board? ;)
The best place to follow the progress of the next release is on the previous release's discussion thread. So in this case, the discussion on the 2.9 release is going on on the 2.8.1 release thread which is here. You'll see on that page my post with all the changes in 2.9 (it's a big list!).
The biggest change is to landing and altitude hold so you need to be careful that you get the PID settings correct and that you do the new accelerometer calibration (the "Beta" button at the bottom of the "ArduCopter Level" screen in the mission planner). The new alt hold controller won't make any different to regular manual throttle (i.e no difference when in stabilize flight mode) but the moment you enter Loiter, Alt-Hold or Auto the new altitude hold controller will be used.
It's definitely "use at your own risk" at this point. Lots of developers have flown it but you need to be careful.
By the way, the major hold-up on releasing to the mission planner is the inertial nav isn't working well for the APM1 because of differences with it's accel sensors and baro. hopefully that'll be fixed within a few days.
UPDATE: APM is now $240 with GPS and NAZA-M Lite with GPS is $200. The NAZA-M Lite is simply the earlier version of NAZA-M that they were selling before that worked extremely well.
and buy one, but I'm married to my three apm
2 apm 2.5
and apm 1.4
This is a very old thread but for those that may stumble upon it, with the right equipment and good tuning (Auto Tune is now available) the APM can equal or exceed the NAZA all around.