FLIGHT UNSTABLE

[CHAD LYONS]

AFTER RECENTLY CRASHING MY DRONE I MADE THE REPAIRS AND REPLACE PROPS WITH BALANCED ONES. WHEN I TAKE OFF I CAN HEAR MY MOTORS REVVING UP AND DOWN AND MY ALTITUDE IS UP AND DOWN. PLEASE HELP!!!!!

 

[With The Birds]

Did you calibrate the IMU? Are they DJI props?

 

[Alex Baxter]

Does it do this in Atti and GPS modes?

 

[CHAD LYONS]

Did you calibrate the IMU? Are they DJI props?

yes i have recalibrated IMU and no change. thanks though

 

[CHAD LYONS]

Does it do this in Atti and GPS modes?

i will get back to you on this Alex Baxter. Thank You

 

[Jim Massey]

Total newbie-so do all the Phantom 3's require some type of mobile devise such as a iPhone or iPad?

 

[B4x4wrangler]

Have this same exact problem with mine, thanks for posting this question cause I was about too

 

[B4x4wrangler]

On mine it does it in all modes

 

[With The Birds]

Total newbie-so do all the Phantom 3's require some type of mobile devise such as a iPhone or iPad?

Not to fly however you do need a tablet/smartphone for video downlink and to control a lot of the functions. The exception being the P4P that can be ordered with a dedicated display included.

 

[With The Birds]

yes i have recalibrated IMU and no change. thanks though

What props are you using?

 

[CHAD LYONS]

What props are you using?

I have used aftermarket and DJI props. Im just curious, how would this affect it? Thanks for all your help With The Birds.

 

[Alex Baxter]

I'm guessing that the next step will be to upload a flight log for the gurus (I'm in awe...)on the site to look at, maybe pressure sensor issues..

 

[CHAD LYONS]

I'm guessing that the next step will be to upload a flight log for the gurus (I'm in awe...)on the site to look at, maybe pressure sensor issues..

I will do that when i figire out how to. I will also try to post a video of flight. Thank u.

 

[With The Birds]

I have used aftermarket and DJI props. Im just curious, how would this affect it? Thanks for all your help With The Birds.

Props probably not the culprit here... I was curious what you were using and if they arrived balanced or you balanced them. If the geometry was significantly different to standard, ie greater pitch for example, less RPM would be required for equivalent thrust (or the inverse may apply). This could confuse the flight controller as it would be required to command a significantly lower or higher line frequency from the ESC's than expected (outside expected operating range).

 

[CHAD LYONS]

Props probably not the culprit here... I was curious what you were using and if they arrived balanced or you balanced them. If the geometry was significantly different to standard, ie greater pitch for example, less RPM would be required for equivalent thrust (or the inverse may apply). This could confuse the flight controller as it would be required to command a significantly lower or higher line frequency from the ESC's than expected (outside expected operating range).

That makes sense. I always check the balance before use. This particular set of props were pretty darn close right out of the package. I really appreciate all of your input. Hopefully we can figure this out soon. Its driving me crazy.

 

[With The Birds]

Do your motors all feel similar (axial play and end float) when manually manipulated? No signs of roughness (magnet interaction with stator disregarded) or binding?

 

[CHAD LYONS]

Do your motors all feel similar (axial play and end float) when manually manipulated? No signs of roughness (magnet interaction with stator disregarded) or binding?

Yes they feel good. I think i am gonna swap them out. I have a new set and thats the only hing i can think to do.

 

[B4x4wrangler]

I been following the post I just swapped mine out an still doing the same thing, I don't know what to do

 

[B4x4wrangler]

In relation to this also sence the crash, when I hit the return to home and it returns it is 10 ft or so off from where is suppose to land, never had that problem before the crash

 

[RodPad]

Total newbie-so do all the Phantom 3's require some type of mobile devise such as a iPhone or iPad?

Welcome to the forum, nobody replied, because this wasn't related to the topic, but yes.

P3S without mobile device

Check out this web sight.
DJI Phantom Accessories & Tips - Phantom Help

and

Here is search that will keep you busy

http://www.phantompilots.com/search/19786719/?q=mobile+device&o=relevance

Rod