Drastic speed reduction on P4 in GPS mode

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I took the P4 out tonight for some sunset shots - lovely calm evening, about 12c temp. Battery full, rc fully charged, everything normal. Got a great gps lock (20) and took off no issues. But my forward (horizontal) speed wouldn't go beyond 6mps. Switched into Sport mode and speed normal - around 19.8. Same with ATTI. But GPS mode and I'm almost in 'learner' mode - I'm not. Everything worked fine, just slow. Got some nice pics, mind.... Any ideas? [

IMG]//uploads.tapatalk-cdn.com/20161022/1596458f4b4c693f71a2097f4b36628e.jpg[/IMG]


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GPS mode is slower compared to other modes as it continuously compute it's new position and checks if it's reducing the gap between actual and reference values. It's like a complex closed loop working.

Hope you are getting enough satellites and compass is properly calibrated. I doubt if RC sticks calibration will matter but nothing wrong in getting it done again.


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I also understand OA reduces speed and turning it off increases speed in GPS mode, but haven't tried it.

Also not recommended if OA is essential to you.
 
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Thank you for your replies. However, the point I'm making is that the speed has changed dramatically in a few days - no other changes made. I wondered if it was an update and others are getting the same situation. I know that GPS mode is slower but it has suddenly dropped to less than half of the standard GPS mode.


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Thank you for your replies. However, the point I'm making is that the speed has changed dramatically in a few days - no other changes made. I wondered if it was an update and others are getting the same situation. I know that GPS mode is slower but it has suddenly dropped to less than half of the standard GPS mode.


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Could it be that it was windy that day? Have you tried calibrating your remote? Could it be that OA was turned off and some update/reset enabled it again?
 
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There are two speeds in P mode.. With object avoidance (Visual Sensing System) off, expect around 13-14 m/s. With it on, expect around 5 m/s.

Also, make sure 'Multiple Flight Modes' is on. I recall doing a firmware update update a while ago and finding out that the update turned this setting off. Until I realized this, I couldn't figure out why it flew so slowly in Sport mode.
 
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S mode uses GPS and it should do over 40mph, not slow.

Make sure multiple flight mode is enabled. In P mode with OA enabled it should only fly about 16mph, even though DJI says 22mph. Turn off OA and it should fly about 33mph in P mode.
 
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Was the camera pointing directly into the low sun? Sometimes mine thinks it's an obstacle and refuses to move further forward or goes slow.

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