phantom hovers then goes into spiral crash

[mheynen]

Hi,
I took of with my phantom 4 today and it was hovering fine but when i went to accelerate the drone went into downward spiral and crashed. The problem was repeated 3 times with the same result. I calibrated the IMU and the same thing happened. the drone seem to hover fine but thats it. Is there a way to look at the flight record and see what failed?

Any suggestions?
Thanks,
Mitch


Phantom 4

 

[sar104]

Follow the instructions in these links:

DJI Flight Log Viewer

How to retrieve a V3 .DAT File from the AC

 

[Firedrone]

I recommend researching 'vortex ring state'.
Assuming that when you say 'accelerate' you mean increase altitude, try (if your happy to risk it) moving the drone forward when you increase altitude.


Disclaimer: I hold no responsibility for anything suggested here or anywhere else.

 

[N017RW]

I recommend researching 'vortex ring state'.
Assuming that when you say 'accelerate' you mean increase altitude, try (if your happy to risk it) moving the drone forward when you increase altitude.


Disclaimer: I hold no responsibility for anything suggested here or anywhere else.

This is only an issue when descending into prop-wash. It has virtually been eliminated by a f/w reduction in descent rate and the canting of the motors since the P3 introduction.

 

[macoman]

Check the propellers... Make sure you put it in the correct order and they are tied.

 

[Firedrone]

This is only an issue when descending into prop-wash. It has virtually been eliminated by a f/w reduction in descent rate and the canting of the motors since the P3 introduction.

Okay but does everyone run the latest fermware?

 

[N017RW]

Okay but does everyone run the latest fermware?

Doesn’t matter. Included in every revision since inception.

 

[Firedrone]

I have a P4 that I bought in early 2017 and it does have a problem 'prop wash'.

 

[sar104]

I have a P4 that I bought in early 2017 and it does have a problem 'prop wash'.

That would be most unusual. Can you post a flight log or DAT file showing that happening?

 

[N017RW]

Prop wash is not a problem per se. All props create ‘wash’.
VRS is a very specific condition and is virtually unheard of any more since late P2 firmware revs combined with design changes since the P3s.
Of course there are conditions which could exacerbate this such entering sinking air such as a downdraft or similar conditions.
I too await to see evidence of this truly being descent induced VRS.