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Old Feb 05, 2015, 04:42 PM
AMA member since May 2013
Supreme Balloon's Avatar
United States, CA, Petaluma
Joined May 2013
1,537 Posts
Post a picture of your ship, that may help diagnose.
Are you sure your flight modes are setup correctly? Not accidentally flying in manual mode?
While the NAZA is forgiving on a few things, like GPS offset measurements, it isn't forgiving if you either mount the controller off the CG and/or do not use the supplied double sided tape (or something similar) to secure it. No velco, no housings, no rubber bands etc.
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Old Feb 06, 2015, 03:59 AM
Registered User
Sweden, Stockholm County, Stockholm
Joined Sep 2013
472 Posts
Hi
Props are spinning in the right direction
GOG OK (no tipping if I hold the quad between two oposite motors)
Controlled GPS mode in the app before flight.
Checked in flight that I hadnt switched to ATTI or Manual
Naza taped on the CG of the frame as advised by the frame manufacturer

I can see one possible point of failure and it is the battery. My hypothesis just now is that I might have had a voltage drop, not enough to let the quad fall down like a stone, but enough to reduce lift so much that it would crash like a bullet, in diagonal, flying on the momentum of the speed it had (with just enough power to keep the props to turn) and in the direction of its movement.

The battery had 3.8 V per cells after 30mn, which mean that they must have been around 3.5 - 3.6V under load, maybe even less than that. I usually have a buzzer but not this time.
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Old Feb 06, 2015, 05:59 AM
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College Place, WA.
Joined Apr 2004
1,184 Posts
Try flying it with a fresh full charge on the battery. Do you have the cell count set right in the assistant screen? 3s or 4s?
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Old Feb 06, 2015, 12:41 PM
SirEdward
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Philippines, NCR, Pateros
Joined Apr 2004
677 Posts
....
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Old Feb 07, 2015, 08:24 AM
Registered User
Germany
Joined Sep 2011
206 Posts
Quote:
Originally Posted by fanch72 View Post
Hi
I can see one possible point of failure and it is the battery. .........
Before time I have such crash too.
I disassembled and assembled the FY680 again and I have not found any problems.
Later I found, that one of the battery, which I used for the crash flight have a bad cell.
The battery work without any problems, no external damages.
But I found, that wen this cell reach 3.8-3.9 volts, the voltage drop immediately and this caused my crash.

Krasimir
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Old Feb 07, 2015, 03:32 PM
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Sweden, Stockholm County, Stockholm
Joined Sep 2013
472 Posts
Quote:
Originally Posted by kmihalkov View Post
Before time I have such crash too.
I disassembled and assembled the FY680 again and I have not found any problems.
Later I found, that one of the battery, which I used for the crash flight have a bad cell.
The battery work without any problems, no external damages.
But I found, that wen this cell reach 3.8-3.9 volts, the voltage drop immediately and this caused my crash.

Krasimir
this is what I think happened. The crashing pattern was really weird.

Anyway, I'll keep you posted when I get my new props
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Old Feb 08, 2015, 09:56 AM
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Joined Aug 2011
5 Posts
What's the best firmware for the original Naza-M with GPS?
I haven't flown it very much in the last two years, so it probably has the 2.01 or 2.02 firmware - the one where it ocassionally drifts away for the first one or two minutes, but i've got used to this.

In the meantime, i've been reading about the different problems with the 3.10 firmware and afterwards ( i think this was 2013) , so i haven't updated it at that time.

Now i've checekd DJI's website and saw that there is a 4.00 firmware. Does this solve the problems, or should i stay with the old firmware?

Thanks.
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Old Feb 08, 2015, 10:07 AM
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United Kingdom, Bracknell
Joined Nov 2000
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4.02 has been around for almost 16 months and is fine.
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