Im new to flyin gso today I went out to fly a little more aggresively because Im getting better.  I flew out about 50 yards at about 20 feet off the ground.  I used forward stick only to fly the UAS back towards me.  The drone would slowly lose altittude while coming back.  I checked the other stick to be sure it was centered and not stuck in downward position.  And then I did the same manuever a few more times.  Each time the drone would lose altitude.  Is this normal?

Hello ,could you please clarify which Phantom model you have ? And please try to calibrate the RC and do the IMU calibration.

DJI Mindy Posted at 2016-9-9 20:34
Hello ,could you please clarify which Phantom model you have ? And please try to calibrate the RC an ...

phantom 4. i did a compass calibration before the flight only. what do you mean RC?

EagleEyeDrone Posted at 2016-9-10 14:07
phantom 4. i did a compass calibration before the flight only. what do you mean RC?

RC means remote control.Please try to do the IMU calibration and update the aircraft firmware to latest version.

DJI Mindy Posted at 2016-9-10 09:13
RC means remote control.Please try to do the IMU calibration and update the aircraft firmware to l ...

Hello, DJI Mindy.
Wanted to ask if lastest firmware have fixed this problem on PH4?
We have ordered just now our PH4 (it should arrive on next week) and I have seen people complaining about this issue. Just want to know if DJI fixed this?

drone-filters.c Posted at 2016-9-10 14:23
Hello, DJI Mindy.
Wanted to ask if lastest firmware have fixed this problem on PH4?
We have order ...

Yes, the latest firmware have fixed this problem.

hey i have problem like you, in 2 month i get altitude drop every flight almost 10-20m! very scary!!
try factory reset, upgrade FW no luck. altitude still drop like crazy

and then i try calibrate sensor VPS with dji assistant, now my ph4 solid like a rock!!

you must try

asimokid Posted at 2016-9-9 23:45
hey i have problem like you, in 2 month i get altitude drop every flight almost 10-20m! very scary!! ...

My firmware is up to sate. There is no message saying I need to update firmware.  I will re calibrate things to see if that helps.  Do you think it's the windy conditions maybe?

EagleEyeDrone Posted at 2016-9-11 05:29
My firmware is up to sate. There is no message saying I need to update firmware.  I will re calibr ...

I mean after dji relase new fw, And I upgraded new fw altitude still drop.
New fw, calibrate imu, factory reset altitude still drop


And last i calibrate vps sensor with dji assistant. My ph4 never drop altitude again
Wind? I think not, because ph4 use gps for hover. So my opinion sensor get wrong data so altitude get drop
Cmiiw

DJI Mindy Posted at 2016-9-10 02:35
Yes, the latest firmware have fixed this problem.

Does the P4 use the ultrasonic readings as the primary source to maintain altitude when it is flying below 30 feet? Please explain.

I do not have an altitude drop after the recent firmware upgrade, I just see some limited yoyo affect once in a while once flying low and over tall grass. But my altitude readings are off many times by many feet.  

MD_Icarus Posted at 2016-9-11 21:45
Does the P4 use the ultrasonic readings as the primary source to maintain altitude when it is flyin ...

Yes, please refer to our manual.