unstable hovering

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i have a 3 p standard and it tends to go down. a foot or two when it is hovering
is this normal?


Sent from my iPhone using PhantomPilots mobile app
 
Yea when you first start flying it'll do that but then figure it out and be good. Auto take off will stop this behavior


Sent from my iPad using PhantomPilots mobile app
 
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You're talking about the initial launch-hover, right?

I think there is some fuzzy math going into the launch and that causes the craft to make adjustments a few secs after the launch. Since the altitude is calculated by air pressure, and since the accelerating props blow air into the ground around the phantom, the air pressure builds significantly just before it lifts. Ordinarily that would mean the aircraft is dropping in altitude, but it hasn't launched yet. So the algorithm allows for this and tries to correct for that adjustment. Then after you launch, the software in the next few secs readjusts to what it believes is correct. So this will cause a little bouncing the first few secs but it should level out quickly...
 

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