That last couple time I've flown my P3S,  It has taken about 2 minutes for the warmup period before I get the "GPS Ready To Fly" status.  All flights were taken off from the same location that I originally calibrated the compass.  Prior to the last couple times, I would get the ready to fly status within a couple seconds. Anyone know what I may be doing wrong. I am a newbee only having the P3S for a couple weeks.


Thank you

Has it been colder recently, taking longer to warm up, doesn't take much of a drop to increase the time quite a bit. I think doing a calibration in the cold will shorten warm up times, but there are reasons why they want to get up to a certain temp.

I get very nervous flying with a cold battery warning but having a lipo in my pants for 20 minutes is a pain sometimes

Thank you for your reply.  Mid to high 50s when flying but that is a bit cooler than it has been.

kmastro66 Posted at 2017-5-15 17:14
Thank you for your reply.  Mid to high 50s when flying but that is a bit cooler than it has been.

1-2 minutes is usual for mine, but on a chilly morning can be 3-4 minutes. If I'm in a heated car I try not to take it out and leave it standing to long.

kmastro66 Posted at 2017-5-15 17:14
Thank you for your reply.  Mid to high 50s when flying but that is a bit cooler than it has been.

See if the warm up time improves in slightly warmer temperatures. Just to clarify, are you seeing just a "warm up" status or "IMU initializing"?

Just a warmup status

kmastro66 Posted at 2017-5-15 19:37
Just a warmup status

I would say, then, just keep an eye on it along with the temperature, like Matt-and-Riley mentioned. Let us know if the "warm up" period continues to be longer than normal after a few more flights.

Do a cold IMU calibration

Like Phantom3ProPilo mentioned,  IMU calibration.  

Thanks Guys,  I'll do the IMU calibration today and let you all know how it went.

If the IMU calibration check says "Calibration not required", should I still perform the calibration?

kmastro66 Posted at 2017-5-16 07:07
If the IMU calibration check says "Calibration not required", should I still perform the calibration?

I've never seen it say anything else! You can still do the calibration to reset all it's sensors and bits.

Been flying in 60 degrees weather.. Ive noticed the extended "aircraft warmup" period as well

So I performed an IMU calibration indoors, at 70 degrees Fahrenheit and on a level surface.  When I flew this morning, warmup time was 30 to 45 seconds and it was also quite a bit cooler than it was yesterday so it appears the IMU calibration helped.